diff --git a/README.md b/README.md
index 21edf20a..bff4b1c7 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,14 @@ Open source. Self-hosted. No Paperclip account required.
 npx paperclipai onboard --yes
 ```
 
+That quickstart path now defaults to trusted local loopback mode for the fastest first run. To start in authenticated/private mode instead, choose a bind preset explicitly:
+
+```bash
+npx paperclipai onboard --yes --bind lan
+# or:
+npx paperclipai onboard --yes --bind tailnet
+```
+
 If you already have Paperclip configured, rerunning `onboard` keeps the existing config in place. Use `paperclipai configure` to edit settings.
 
 Or manually:
diff --git a/cli/README.md b/cli/README.md
index 1826e376..4de796b5 100644
--- a/cli/README.md
+++ b/cli/README.md
@@ -177,6 +177,14 @@ Open source. Self-hosted. No Paperclip account required.
 npx paperclipai onboard --yes
 ```
 
+That quickstart path now defaults to trusted local loopback mode for the fastest first run. To start in authenticated/private mode instead, choose a bind preset explicitly:
+
+```bash
+npx paperclipai onboard --yes --bind lan
+# or:
+npx paperclipai onboard --yes --bind tailnet
+```
+
 If you already have Paperclip configured, rerunning `onboard` keeps the existing config in place. Use `paperclipai configure` to edit settings.
 
 Or manually:
diff --git a/cli/src/__tests__/network-bind.test.ts b/cli/src/__tests__/network-bind.test.ts
new file mode 100644
index 00000000..4c2bc555
--- /dev/null
+++ b/cli/src/__tests__/network-bind.test.ts
@@ -0,0 +1,35 @@
+import { describe, expect, it } from "vitest";
+import { resolveRuntimeBind, validateConfiguredBindMode } from "@paperclipai/shared";
+
+describe("network bind helpers", () => {
+  it("rejects non-loopback bind modes in local_trusted", () => {
+    expect(
+      validateConfiguredBindMode({
+        deploymentMode: "local_trusted",
+        deploymentExposure: "private",
+        bind: "lan",
+        host: "0.0.0.0",
+      }),
+    ).toContain("local_trusted requires server.bind=loopback");
+  });
+
+  it("resolves tailnet bind using the detected tailscale address", () => {
+    const resolved = resolveRuntimeBind({
+      bind: "tailnet",
+      host: "127.0.0.1",
+      tailnetBindHost: "100.64.0.8",
+    });
+
+    expect(resolved.errors).toEqual([]);
+    expect(resolved.host).toBe("100.64.0.8");
+  });
+
+  it("requires a custom bind host when bind=custom", () => {
+    const resolved = resolveRuntimeBind({
+      bind: "custom",
+      host: "127.0.0.1",
+    });
+
+    expect(resolved.errors).toContain("server.customBindHost is required when server.bind=custom");
+  });
+});
diff --git a/cli/src/__tests__/onboard.test.ts b/cli/src/__tests__/onboard.test.ts
index df1a91b8..f686e071 100644
--- a/cli/src/__tests__/onboard.test.ts
+++ b/cli/src/__tests__/onboard.test.ts
@@ -74,6 +74,11 @@ function createExistingConfigFixture() {
   return { configPath, configText: fs.readFileSync(configPath, "utf8") };
 }
 
+function createFreshConfigPath() {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), "paperclip-onboard-fresh-"));
+  return path.join(root, ".paperclip", "config.json");
+}
+
 describe("onboard", () => {
   beforeEach(() => {
     process.env = { ...ORIGINAL_ENV };
@@ -105,4 +110,43 @@ describe("onboard", () => {
     expect(fs.existsSync(`${fixture.configPath}.backup`)).toBe(false);
     expect(fs.existsSync(path.join(path.dirname(fixture.configPath), ".env"))).toBe(true);
   });
+
+  it("keeps --yes onboarding on local trusted loopback defaults", async () => {
+    const configPath = createFreshConfigPath();
+    process.env.HOST = "0.0.0.0";
+    process.env.PAPERCLIP_BIND = "lan";
+
+    await onboard({ config: configPath, yes: true, invokedByRun: true });
+
+    const raw = JSON.parse(fs.readFileSync(configPath, "utf8")) as PaperclipConfig;
+    expect(raw.server.deploymentMode).toBe("local_trusted");
+    expect(raw.server.exposure).toBe("private");
+    expect(raw.server.bind).toBe("loopback");
+    expect(raw.server.host).toBe("127.0.0.1");
+  });
+
+  it("supports authenticated/private quickstart bind presets", async () => {
+    const configPath = createFreshConfigPath();
+
+    await onboard({ config: configPath, yes: true, invokedByRun: true, bind: "tailnet" });
+
+    const raw = JSON.parse(fs.readFileSync(configPath, "utf8")) as PaperclipConfig;
+    expect(raw.server.deploymentMode).toBe("authenticated");
+    expect(raw.server.exposure).toBe("private");
+    expect(raw.server.bind).toBe("tailnet");
+    expect(raw.server.host).toBe("0.0.0.0");
+  });
+
+  it("ignores deployment env overrides during --yes quickstart", async () => {
+    const configPath = createFreshConfigPath();
+    process.env.PAPERCLIP_DEPLOYMENT_MODE = "authenticated";
+
+    await onboard({ config: configPath, yes: true, invokedByRun: true });
+
+    const raw = JSON.parse(fs.readFileSync(configPath, "utf8")) as PaperclipConfig;
+    expect(raw.server.deploymentMode).toBe("local_trusted");
+    expect(raw.server.exposure).toBe("private");
+    expect(raw.server.bind).toBe("loopback");
+    expect(raw.server.host).toBe("127.0.0.1");
+  });
 });
diff --git a/cli/src/checks/deployment-auth-check.ts b/cli/src/checks/deployment-auth-check.ts
index 580e7e08..6434ede0 100644
--- a/cli/src/checks/deployment-auth-check.ts
+++ b/cli/src/checks/deployment-auth-check.ts
@@ -1,24 +1,21 @@
+import { inferBindModeFromHost } from "@paperclipai/shared";
 import type { PaperclipConfig } from "../config/schema.js";
 import type { CheckResult } from "./index.js";
 
-function isLoopbackHost(host: string) {
-  const normalized = host.trim().toLowerCase();
-  return normalized === "127.0.0.1" || normalized === "localhost" || normalized === "::1";
-}
-
 export function deploymentAuthCheck(config: PaperclipConfig): CheckResult {
   const mode = config.server.deploymentMode;
   const exposure = config.server.exposure;
   const auth = config.auth;
+  const bind = config.server.bind ?? inferBindModeFromHost(config.server.host);
 
   if (mode === "local_trusted") {
-    if (!isLoopbackHost(config.server.host)) {
+    if (bind !== "loopback") {
       return {
         name: "Deployment/auth mode",
         status: "fail",
-        message: `local_trusted requires loopback host binding (found ${config.server.host})`,
+        message: `local_trusted requires loopback binding (found ${bind})`,
         canRepair: false,
-        repairHint: "Run `paperclipai configure --section server` and set host to 127.0.0.1",
+        repairHint: "Run `paperclipai configure --section server` and choose Local trusted / loopback reachability",
       };
     }
     return {
@@ -86,6 +83,6 @@ export function deploymentAuthCheck(config: PaperclipConfig): CheckResult {
   return {
     name: "Deployment/auth mode",
     status: "pass",
-    message: `Mode ${mode}/${exposure} with auth URL mode ${auth.baseUrlMode}`,
+    message: `Mode ${mode}/${exposure} with bind ${bind} and auth URL mode ${auth.baseUrlMode}`,
   };
 }
diff --git a/cli/src/commands/auth-bootstrap-ceo.ts b/cli/src/commands/auth-bootstrap-ceo.ts
index dc720f63..d07b9a70 100644
--- a/cli/src/commands/auth-bootstrap-ceo.ts
+++ b/cli/src/commands/auth-bootstrap-ceo.ts
@@ -3,6 +3,7 @@ import * as p from "@clack/prompts";
 import pc from "picocolors";
 import { and, eq, gt, isNull } from "drizzle-orm";
 import { createDb, instanceUserRoles, invites } from "@paperclipai/db";
+import { inferBindModeFromHost } from "@paperclipai/shared";
 import { loadPaperclipEnvFile } from "../config/env.js";
 import { readConfig, resolveConfigPath } from "../config/store.js";
 
@@ -40,9 +41,13 @@ function resolveBaseUrl(configPath?: string, explicitBaseUrl?: string) {
   if (config?.auth.baseUrlMode === "explicit" && config.auth.publicBaseUrl) {
     return config.auth.publicBaseUrl.replace(/\/+$/, "");
   }
-  const host = config?.server.host ?? "localhost";
+  const bind = config?.server.bind ?? inferBindModeFromHost(config?.server.host);
+  const host =
+    bind === "custom"
+      ? config?.server.customBindHost ?? config?.server.host ?? "localhost"
+      : config?.server.host ?? "localhost";
   const port = config?.server.port ?? 3100;
-  const publicHost = host === "0.0.0.0" ? "localhost" : host;
+  const publicHost = host === "0.0.0.0" || bind === "lan" ? "localhost" : host;
   return `http://${publicHost}:${port}`;
 }
 
diff --git a/cli/src/commands/configure.ts b/cli/src/commands/configure.ts
index 83ff089b..b7d2dcbc 100644
--- a/cli/src/commands/configure.ts
+++ b/cli/src/commands/configure.ts
@@ -54,6 +54,7 @@ function defaultConfig(): PaperclipConfig {
     server: {
       deploymentMode: "local_trusted",
       exposure: "private",
+      bind: "loopback",
       host: "127.0.0.1",
       port: 3100,
       allowedHostnames: [],
diff --git a/cli/src/commands/onboard.ts b/cli/src/commands/onboard.ts
index d9b325a8..0fabfd0a 100644
--- a/cli/src/commands/onboard.ts
+++ b/cli/src/commands/onboard.ts
@@ -3,10 +3,14 @@ import path from "node:path";
 import pc from "picocolors";
 import {
   AUTH_BASE_URL_MODES,
+  BIND_MODES,
   DEPLOYMENT_EXPOSURES,
   DEPLOYMENT_MODES,
   SECRET_PROVIDERS,
   STORAGE_PROVIDERS,
+  inferBindModeFromHost,
+  resolveRuntimeBind,
+  type BindMode,
   type AuthBaseUrlMode,
   type DeploymentExposure,
   type DeploymentMode,
@@ -23,6 +27,7 @@ import { promptLogging } from "../prompts/logging.js";
 import { defaultSecretsConfig } from "../prompts/secrets.js";
 import { defaultStorageConfig, promptStorage } from "../prompts/storage.js";
 import { promptServer } from "../prompts/server.js";
+import { buildPresetServerConfig } from "../config/server-bind.js";
 import {
   describeLocalInstancePaths,
   expandHomePrefix,
@@ -46,6 +51,7 @@ type OnboardOptions = {
   run?: boolean;
   yes?: boolean;
   invokedByRun?: boolean;
+  bind?: BindMode;
 };
 
 type OnboardDefaults = Pick<PaperclipConfig, "database" | "logging" | "server" | "auth" | "storage" | "secrets">;
@@ -59,6 +65,9 @@ const ONBOARD_ENV_KEYS = [
   "PAPERCLIP_DB_BACKUP_DIR",
   "PAPERCLIP_DEPLOYMENT_MODE",
   "PAPERCLIP_DEPLOYMENT_EXPOSURE",
+  "PAPERCLIP_BIND",
+  "PAPERCLIP_BIND_HOST",
+  "PAPERCLIP_TAILNET_BIND_HOST",
   "HOST",
   "PORT",
   "SERVE_UI",
@@ -104,29 +113,62 @@ function resolvePathFromEnv(rawValue: string | undefined): string | null {
   return path.resolve(expandHomePrefix(rawValue.trim()));
 }
 
-function quickstartDefaultsFromEnv(): {
+function describeServerBinding(server: Pick<PaperclipConfig["server"], "bind" | "customBindHost" | "host" | "port">): string {
+  const bind = server.bind ?? inferBindModeFromHost(server.host);
+  const detail =
+    bind === "custom"
+      ? server.customBindHost ?? server.host
+      : bind === "tailnet"
+        ? "detected tailscale address"
+        : server.host;
+  return `${bind}${detail ? ` (${detail})` : ""}:${server.port}`;
+}
+
+function quickstartDefaultsFromEnv(opts?: { preferTrustedLocal?: boolean }): {
   defaults: OnboardDefaults;
   usedEnvKeys: string[];
   ignoredEnvKeys: Array<{ key: string; reason: string }>;
 } {
+  const preferTrustedLocal = opts?.preferTrustedLocal ?? false;
   const instanceId = resolvePaperclipInstanceId();
   const defaultStorage = defaultStorageConfig();
   const defaultSecrets = defaultSecretsConfig();
   const databaseUrl = process.env.DATABASE_URL?.trim() || undefined;
-  const publicUrl =
-    process.env.PAPERCLIP_PUBLIC_URL?.trim() ||
-    process.env.PAPERCLIP_AUTH_PUBLIC_BASE_URL?.trim() ||
-    process.env.BETTER_AUTH_URL?.trim() ||
-    process.env.BETTER_AUTH_BASE_URL?.trim() ||
-    undefined;
-  const deploymentMode =
-    parseEnumFromEnv<DeploymentMode>(process.env.PAPERCLIP_DEPLOYMENT_MODE, DEPLOYMENT_MODES) ?? "local_trusted";
+  const publicUrl = preferTrustedLocal
+    ? undefined
+    : (
+      process.env.PAPERCLIP_PUBLIC_URL?.trim() ||
+      process.env.PAPERCLIP_AUTH_PUBLIC_BASE_URL?.trim() ||
+      process.env.BETTER_AUTH_URL?.trim() ||
+      process.env.BETTER_AUTH_BASE_URL?.trim() ||
+      undefined
+    );
+  const deploymentMode = preferTrustedLocal
+    ? "local_trusted"
+    : (parseEnumFromEnv<DeploymentMode>(process.env.PAPERCLIP_DEPLOYMENT_MODE, DEPLOYMENT_MODES) ?? "local_trusted");
   const deploymentExposureFromEnv = parseEnumFromEnv<DeploymentExposure>(
     process.env.PAPERCLIP_DEPLOYMENT_EXPOSURE,
     DEPLOYMENT_EXPOSURES,
   );
   const deploymentExposure =
     deploymentMode === "local_trusted" ? "private" : (deploymentExposureFromEnv ?? "private");
+  const bindFromEnv = parseEnumFromEnv<BindMode>(process.env.PAPERCLIP_BIND, BIND_MODES);
+  const customBindHostFromEnv = process.env.PAPERCLIP_BIND_HOST?.trim() || undefined;
+  const hostFromEnv = process.env.HOST?.trim() || undefined;
+  const configuredBindHost = customBindHostFromEnv ?? hostFromEnv;
+  const bind = preferTrustedLocal
+    ? "loopback"
+    : (
+      deploymentMode === "local_trusted"
+        ? "loopback"
+        : (bindFromEnv ?? (configuredBindHost ? inferBindModeFromHost(configuredBindHost) : "lan"))
+    );
+  const resolvedBind = resolveRuntimeBind({
+    bind,
+    host: hostFromEnv ?? (bind === "loopback" ? "127.0.0.1" : "0.0.0.0"),
+    customBindHost: customBindHostFromEnv,
+    tailnetBindHost: process.env.PAPERCLIP_TAILNET_BIND_HOST?.trim(),
+  });
   const authPublicBaseUrl = publicUrl;
   const authBaseUrlModeFromEnv = parseEnumFromEnv<AuthBaseUrlMode>(
     process.env.PAPERCLIP_AUTH_BASE_URL_MODE,
@@ -183,7 +225,9 @@ function quickstartDefaultsFromEnv(): {
     server: {
       deploymentMode,
       exposure: deploymentExposure,
-      host: process.env.HOST ?? "127.0.0.1",
+      bind: resolvedBind.bind,
+      ...(resolvedBind.customBindHost ? { customBindHost: resolvedBind.customBindHost } : {}),
+      host: resolvedBind.host,
       port: Number(process.env.PORT) || 3100,
       allowedHostnames: Array.from(new Set([...allowedHostnamesFromEnv, ...(hostnameFromPublicUrl ? [hostnameFromPublicUrl] : [])])),
       serveUi: parseBooleanFromEnv(process.env.SERVE_UI) ?? true,
@@ -220,12 +264,49 @@ function quickstartDefaultsFromEnv(): {
     },
   };
   const ignoredEnvKeys: Array<{ key: string; reason: string }> = [];
+  if (preferTrustedLocal) {
+    const forcedLocalReason = "Ignored because --yes quickstart forces trusted local loopback defaults";
+    for (const key of [
+      "PAPERCLIP_DEPLOYMENT_MODE",
+      "PAPERCLIP_DEPLOYMENT_EXPOSURE",
+      "PAPERCLIP_BIND",
+      "PAPERCLIP_BIND_HOST",
+      "HOST",
+      "PAPERCLIP_AUTH_BASE_URL_MODE",
+      "PAPERCLIP_AUTH_PUBLIC_BASE_URL",
+      "PAPERCLIP_PUBLIC_URL",
+      "BETTER_AUTH_URL",
+      "BETTER_AUTH_BASE_URL",
+    ] as const) {
+      if (process.env[key] !== undefined) {
+        ignoredEnvKeys.push({ key, reason: forcedLocalReason });
+      }
+    }
+  }
   if (deploymentMode === "local_trusted" && process.env.PAPERCLIP_DEPLOYMENT_EXPOSURE !== undefined) {
     ignoredEnvKeys.push({
       key: "PAPERCLIP_DEPLOYMENT_EXPOSURE",
       reason: "Ignored because deployment mode local_trusted always forces private exposure",
     });
   }
+  if (deploymentMode === "local_trusted" && process.env.PAPERCLIP_BIND !== undefined) {
+    ignoredEnvKeys.push({
+      key: "PAPERCLIP_BIND",
+      reason: "Ignored because deployment mode local_trusted always uses loopback reachability",
+    });
+  }
+  if (deploymentMode === "local_trusted" && process.env.PAPERCLIP_BIND_HOST !== undefined) {
+    ignoredEnvKeys.push({
+      key: "PAPERCLIP_BIND_HOST",
+      reason: "Ignored because deployment mode local_trusted always uses loopback reachability",
+    });
+  }
+  if (deploymentMode === "local_trusted" && process.env.HOST !== undefined) {
+    ignoredEnvKeys.push({
+      key: "HOST",
+      reason: "Ignored because deployment mode local_trusted always uses loopback reachability",
+    });
+  }
 
   const ignoredKeySet = new Set(ignoredEnvKeys.map((entry) => entry.key));
   const usedEnvKeys = ONBOARD_ENV_KEYS.filter(
@@ -239,6 +320,10 @@ function canCreateBootstrapInviteImmediately(config: Pick<PaperclipConfig, "data
 }
 
 export async function onboard(opts: OnboardOptions): Promise<void> {
+  if (opts.bind && !["loopback", "lan", "tailnet"].includes(opts.bind)) {
+    throw new Error(`Unsupported bind preset for onboard: ${opts.bind}. Use loopback, lan, or tailnet.`);
+  }
+
   printPaperclipCliBanner();
   p.intro(pc.bgCyan(pc.black(" paperclipai onboard ")));
   const configPath = resolveConfigPath(opts.config);
@@ -293,7 +378,7 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
         `Database: ${existingConfig.database.mode}`,
         existingConfig.llm ? `LLM: ${existingConfig.llm.provider}` : "LLM: not configured",
         `Logging: ${existingConfig.logging.mode} -> ${existingConfig.logging.logDir}`,
-        `Server: ${existingConfig.server.deploymentMode}/${existingConfig.server.exposure} @ ${existingConfig.server.host}:${existingConfig.server.port}`,
+        `Server: ${existingConfig.server.deploymentMode}/${existingConfig.server.exposure} @ ${describeServerBinding(existingConfig.server)}`,
         `Allowed hosts: ${existingConfig.server.allowedHostnames.length > 0 ? existingConfig.server.allowedHostnames.join(", ") : "(loopback only)"}`,
         `Auth URL mode: ${existingConfig.auth.baseUrlMode}${existingConfig.auth.publicBaseUrl ? ` (${existingConfig.auth.publicBaseUrl})` : ""}`,
         `Storage: ${existingConfig.storage.provider}`,
@@ -336,7 +421,13 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
 
   let setupMode: SetupMode = "quickstart";
   if (opts.yes) {
-    p.log.message(pc.dim("`--yes` enabled: using Quickstart defaults."));
+    p.log.message(
+      pc.dim(
+        opts.bind
+          ? `\`--yes\` enabled: using Quickstart defaults with bind=${opts.bind}.`
+          : "`--yes` enabled: using Quickstart defaults.",
+      ),
+    );
   } else {
     const setupModeChoice = await p.select({
       message: "Choose setup path",
@@ -365,7 +456,9 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
   if (tc) trackInstallStarted(tc);
 
   let llm: PaperclipConfig["llm"] | undefined;
-  const { defaults: derivedDefaults, usedEnvKeys, ignoredEnvKeys } = quickstartDefaultsFromEnv();
+  const { defaults: derivedDefaults, usedEnvKeys, ignoredEnvKeys } = quickstartDefaultsFromEnv({
+    preferTrustedLocal: opts.yes === true && !opts.bind,
+  });
   let {
     database,
     logging,
@@ -375,6 +468,16 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
     secrets,
   } = derivedDefaults;
 
+  if (opts.bind === "loopback" || opts.bind === "lan" || opts.bind === "tailnet") {
+    const preset = buildPresetServerConfig(opts.bind, {
+      port: server.port,
+      allowedHostnames: server.allowedHostnames,
+      serveUi: server.serveUi,
+    });
+    server = preset.server;
+    auth = preset.auth;
+  }
+
   if (setupMode === "advanced") {
     p.log.step(pc.bold("Database"));
     database = await promptDatabase(database);
@@ -462,7 +565,13 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
     );
   } else {
     p.log.step(pc.bold("Quickstart"));
-    p.log.message(pc.dim("Using quickstart defaults."));
+    p.log.message(
+      pc.dim(
+        opts.bind
+          ? `Using quickstart defaults with bind=${opts.bind}.`
+          : `Using quickstart defaults: ${server.deploymentMode}/${server.exposure} @ ${describeServerBinding(server)}.`,
+      ),
+    );
     if (usedEnvKeys.length > 0) {
       p.log.message(pc.dim(`Environment-aware defaults active (${usedEnvKeys.length} env var(s) detected).`));
     } else {
@@ -521,7 +630,7 @@ export async function onboard(opts: OnboardOptions): Promise<void> {
       `Database: ${database.mode}`,
       llm ? `LLM: ${llm.provider}` : "LLM: not configured",
       `Logging: ${logging.mode} -> ${logging.logDir}`,
-      `Server: ${server.deploymentMode}/${server.exposure} @ ${server.host}:${server.port}`,
+      `Server: ${server.deploymentMode}/${server.exposure} @ ${describeServerBinding(server)}`,
       `Allowed hosts: ${server.allowedHostnames.length > 0 ? server.allowedHostnames.join(", ") : "(loopback only)"}`,
       `Auth URL mode: ${auth.baseUrlMode}${auth.publicBaseUrl ? ` (${auth.publicBaseUrl})` : ""}`,
       `Storage: ${storage.provider}`,
diff --git a/cli/src/commands/run.ts b/cli/src/commands/run.ts
index b39ab06c..9bc9655b 100644
--- a/cli/src/commands/run.ts
+++ b/cli/src/commands/run.ts
@@ -22,6 +22,7 @@ interface RunOptions {
   instance?: string;
   repair?: boolean;
   yes?: boolean;
+  bind?: "loopback" | "lan" | "tailnet";
 }
 
 interface StartedServer {
@@ -58,7 +59,7 @@ export async function runCommand(opts: RunOptions): Promise<void> {
     }
 
     p.log.step("No config found. Starting onboarding...");
-    await onboard({ config: configPath, invokedByRun: true });
+    await onboard({ config: configPath, invokedByRun: true, bind: opts.bind });
   }
 
   p.log.step("Running doctor checks...");
diff --git a/cli/src/commands/worktree-lib.ts b/cli/src/commands/worktree-lib.ts
index d2b6c5f7..5d4a0721 100644
--- a/cli/src/commands/worktree-lib.ts
+++ b/cli/src/commands/worktree-lib.ts
@@ -214,6 +214,8 @@ export function buildWorktreeConfig(input: {
     server: {
       deploymentMode: source?.server.deploymentMode ?? "local_trusted",
       exposure: source?.server.exposure ?? "private",
+      ...(source?.server.bind ? { bind: source.server.bind } : {}),
+      ...(source?.server.customBindHost ? { customBindHost: source.server.customBindHost } : {}),
       host: source?.server.host ?? "127.0.0.1",
       port: serverPort,
       allowedHostnames: source?.server.allowedHostnames ?? [],
diff --git a/cli/src/config/server-bind.ts b/cli/src/config/server-bind.ts
new file mode 100644
index 00000000..93cd3eff
--- /dev/null
+++ b/cli/src/config/server-bind.ts
@@ -0,0 +1,156 @@
+import {
+  ALL_INTERFACES_BIND_HOST,
+  LOOPBACK_BIND_HOST,
+  inferBindModeFromHost,
+  isAllInterfacesHost,
+  isLoopbackHost,
+  type BindMode,
+  type DeploymentExposure,
+  type DeploymentMode,
+} from "@paperclipai/shared";
+import type { AuthConfig, ServerConfig } from "./schema.js";
+
+type BaseServerInput = {
+  port: number;
+  allowedHostnames: string[];
+  serveUi: boolean;
+};
+
+export function inferConfiguredBind(server?: Partial<ServerConfig>): BindMode {
+  if (server?.bind) return server.bind;
+  return inferBindModeFromHost(server?.customBindHost ?? server?.host);
+}
+
+export function buildPresetServerConfig(
+  bind: Exclude<BindMode, "custom">,
+  input: BaseServerInput,
+): { server: ServerConfig; auth: AuthConfig } {
+  const host = bind === "loopback" ? LOOPBACK_BIND_HOST : ALL_INTERFACES_BIND_HOST;
+
+  return {
+    server: {
+      deploymentMode: bind === "loopback" ? "local_trusted" : "authenticated",
+      exposure: "private",
+      bind,
+      customBindHost: undefined,
+      host,
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+    },
+    auth: {
+      baseUrlMode: "auto",
+      disableSignUp: false,
+    },
+  };
+}
+
+export function buildCustomServerConfig(input: BaseServerInput & {
+  deploymentMode: DeploymentMode;
+  exposure: DeploymentExposure;
+  host: string;
+  publicBaseUrl?: string;
+}): { server: ServerConfig; auth: AuthConfig } {
+  const normalizedHost = input.host.trim();
+  const bind = isLoopbackHost(normalizedHost)
+    ? "loopback"
+    : isAllInterfacesHost(normalizedHost)
+      ? "lan"
+      : "custom";
+
+  return {
+    server: {
+      deploymentMode: input.deploymentMode,
+      exposure: input.deploymentMode === "local_trusted" ? "private" : input.exposure,
+      bind,
+      customBindHost: bind === "custom" ? normalizedHost : undefined,
+      host: normalizedHost,
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+    },
+    auth:
+      input.deploymentMode === "authenticated" && input.exposure === "public"
+        ? {
+          baseUrlMode: "explicit",
+          disableSignUp: false,
+          publicBaseUrl: input.publicBaseUrl,
+        }
+        : {
+          baseUrlMode: "auto",
+          disableSignUp: false,
+        },
+  };
+}
+
+export function resolveQuickstartServerConfig(input: {
+  bind?: BindMode | null;
+  deploymentMode?: DeploymentMode | null;
+  exposure?: DeploymentExposure | null;
+  host?: string | null;
+  port: number;
+  allowedHostnames: string[];
+  serveUi: boolean;
+  publicBaseUrl?: string;
+}): { server: ServerConfig; auth: AuthConfig } {
+  const trimmedHost = input.host?.trim();
+  const explicitBind = input.bind ?? null;
+
+  if (explicitBind === "loopback" || explicitBind === "lan" || explicitBind === "tailnet") {
+    return buildPresetServerConfig(explicitBind, {
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+    });
+  }
+
+  if (explicitBind === "custom") {
+    return buildCustomServerConfig({
+      deploymentMode: input.deploymentMode ?? "authenticated",
+      exposure: input.exposure ?? "private",
+      host: trimmedHost || LOOPBACK_BIND_HOST,
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+      publicBaseUrl: input.publicBaseUrl,
+    });
+  }
+
+  if (trimmedHost) {
+    return buildCustomServerConfig({
+      deploymentMode: input.deploymentMode ?? (isLoopbackHost(trimmedHost) ? "local_trusted" : "authenticated"),
+      exposure: input.exposure ?? "private",
+      host: trimmedHost,
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+      publicBaseUrl: input.publicBaseUrl,
+    });
+  }
+
+  if (input.deploymentMode === "authenticated") {
+    if (input.exposure === "public") {
+      return buildCustomServerConfig({
+        deploymentMode: "authenticated",
+        exposure: "public",
+        host: ALL_INTERFACES_BIND_HOST,
+        port: input.port,
+        allowedHostnames: input.allowedHostnames,
+        serveUi: input.serveUi,
+        publicBaseUrl: input.publicBaseUrl,
+      });
+    }
+
+    return buildPresetServerConfig("lan", {
+      port: input.port,
+      allowedHostnames: input.allowedHostnames,
+      serveUi: input.serveUi,
+    });
+  }
+
+  return buildPresetServerConfig("loopback", {
+    port: input.port,
+    allowedHostnames: input.allowedHostnames,
+    serveUi: input.serveUi,
+  });
+}
diff --git a/cli/src/index.ts b/cli/src/index.ts
index 11739459..b2208798 100644
--- a/cli/src/index.ts
+++ b/cli/src/index.ts
@@ -50,7 +50,8 @@ program
   .description("Interactive first-run setup wizard")
   .option("-c, --config <path>", "Path to config file")
   .option("-d, --data-dir <path>", DATA_DIR_OPTION_HELP)
-  .option("-y, --yes", "Accept defaults (quickstart + start immediately)", false)
+  .option("--bind <mode>", "Quickstart reachability preset (loopback, lan, tailnet)")
+  .option("-y, --yes", "Accept quickstart defaults (trusted local loopback unless --bind is set) and start immediately", false)
   .option("--run", "Start Paperclip immediately after saving config", false)
   .action(onboard);
 
@@ -108,6 +109,7 @@ program
   .option("-c, --config <path>", "Path to config file")
   .option("-d, --data-dir <path>", DATA_DIR_OPTION_HELP)
   .option("-i, --instance <id>", "Local instance id (default: default)")
+  .option("--bind <mode>", "On first run, use onboarding reachability preset (loopback, lan, tailnet)")
   .option("--repair", "Attempt automatic repairs during doctor", true)
   .option("--no-repair", "Disable automatic repairs during doctor")
   .action(runCommand);
diff --git a/cli/src/prompts/server.ts b/cli/src/prompts/server.ts
index e5c26180..78810188 100644
--- a/cli/src/prompts/server.ts
+++ b/cli/src/prompts/server.ts
@@ -1,6 +1,17 @@
 import * as p from "@clack/prompts";
+import { isLoopbackHost, type BindMode } from "@paperclipai/shared";
 import type { AuthConfig, ServerConfig } from "../config/schema.js";
 import { parseHostnameCsv } from "../config/hostnames.js";
+import {
+  buildCustomServerConfig,
+  buildPresetServerConfig,
+  inferConfiguredBind,
+} from "../config/server-bind.js";
+
+function cancelled(): never {
+  p.cancel("Setup cancelled.");
+  process.exit(0);
+}
 
 export async function promptServer(opts?: {
   currentServer?: Partial<ServerConfig>;
@@ -8,69 +19,37 @@ export async function promptServer(opts?: {
 }): Promise<{ server: ServerConfig; auth: AuthConfig }> {
   const currentServer = opts?.currentServer;
   const currentAuth = opts?.currentAuth;
+  const currentBind = inferConfiguredBind(currentServer);
 
-  const deploymentModeSelection = await p.select({
-    message: "Deployment mode",
+  const bindSelection = await p.select({
+    message: "Reachability",
     options: [
       {
-        value: "local_trusted",
-        label: "Local trusted",
-        hint: "Easiest for local setup (no login, localhost-only)",
+        value: "loopback" as const,
+        label: "Trusted local",
+        hint: "Recommended for first run: localhost only, no login friction",
       },
       {
-        value: "authenticated",
-        label: "Authenticated",
-        hint: "Login required; use for private network or public hosting",
+        value: "lan" as const,
+        label: "Private network",
+        hint: "Broad private bind for LAN, VPN, or legacy --tailscale-auth style access",
+      },
+      {
+        value: "tailnet" as const,
+        label: "Tailnet",
+        hint: "Private authenticated access using the machine's detected Tailscale address",
+      },
+      {
+        value: "custom" as const,
+        label: "Custom",
+        hint: "Choose exact auth mode, exposure, and host manually",
       },
     ],
-    initialValue: currentServer?.deploymentMode ?? "local_trusted",
+    initialValue: currentBind,
   });
 
-  if (p.isCancel(deploymentModeSelection)) {
-    p.cancel("Setup cancelled.");
-    process.exit(0);
-  }
-  const deploymentMode = deploymentModeSelection as ServerConfig["deploymentMode"];
-
-  let exposure: ServerConfig["exposure"] = "private";
-  if (deploymentMode === "authenticated") {
-    const exposureSelection = await p.select({
-      message: "Exposure profile",
-      options: [
-        {
-          value: "private",
-          label: "Private network",
-          hint: "Private access (for example Tailscale), lower setup friction",
-        },
-        {
-          value: "public",
-          label: "Public internet",
-          hint: "Internet-facing deployment with stricter requirements",
-        },
-      ],
-      initialValue: currentServer?.exposure ?? "private",
-    });
-    if (p.isCancel(exposureSelection)) {
-      p.cancel("Setup cancelled.");
-      process.exit(0);
-    }
-    exposure = exposureSelection as ServerConfig["exposure"];
-  }
-
-  const hostDefault = deploymentMode === "local_trusted" ? "127.0.0.1" : "0.0.0.0";
-  const hostStr = await p.text({
-    message: "Bind host",
-    defaultValue: currentServer?.host ?? hostDefault,
-    placeholder: hostDefault,
-    validate: (val) => {
-      if (!val.trim()) return "Host is required";
-    },
-  });
-
-  if (p.isCancel(hostStr)) {
-    p.cancel("Setup cancelled.");
-    process.exit(0);
-  }
+  if (p.isCancel(bindSelection)) cancelled();
+  const bind = bindSelection as BindMode;
 
   const portStr = await p.text({
     message: "Server port",
@@ -84,15 +63,109 @@ export async function promptServer(opts?: {
     },
   });
 
-  if (p.isCancel(portStr)) {
-    p.cancel("Setup cancelled.");
-    process.exit(0);
+  if (p.isCancel(portStr)) cancelled();
+  const port = Number(portStr) || 3100;
+  const serveUi = currentServer?.serveUi ?? true;
+
+  if (bind === "loopback") {
+    return buildPresetServerConfig("loopback", {
+      port,
+      allowedHostnames: [],
+      serveUi,
+    });
   }
 
+  if (bind === "lan" || bind === "tailnet") {
+    const allowedHostnamesInput = await p.text({
+      message: "Allowed private hostnames (comma-separated, optional)",
+      defaultValue: (currentServer?.allowedHostnames ?? []).join(", "),
+      placeholder:
+        bind === "tailnet"
+          ? "your-machine.tailnet.ts.net"
+          : "dotta-macbook-pro, host.docker.internal",
+      validate: (val) => {
+        try {
+          parseHostnameCsv(val);
+          return;
+        } catch (err) {
+          return err instanceof Error ? err.message : "Invalid hostname list";
+        }
+      },
+    });
+
+    if (p.isCancel(allowedHostnamesInput)) cancelled();
+
+    return buildPresetServerConfig(bind, {
+      port,
+      allowedHostnames: parseHostnameCsv(allowedHostnamesInput),
+      serveUi,
+    });
+  }
+
+  const deploymentModeSelection = await p.select({
+    message: "Auth mode",
+    options: [
+      {
+        value: "local_trusted",
+        label: "Local trusted",
+        hint: "No login required; only safe with loopback-only or similarly trusted access",
+      },
+      {
+        value: "authenticated",
+        label: "Authenticated",
+        hint: "Login required; supports both private-network and public deployments",
+      },
+    ],
+    initialValue: currentServer?.deploymentMode ?? "authenticated",
+  });
+
+  if (p.isCancel(deploymentModeSelection)) cancelled();
+  const deploymentMode = deploymentModeSelection as ServerConfig["deploymentMode"];
+
+  let exposure: ServerConfig["exposure"] = "private";
+  if (deploymentMode === "authenticated") {
+    const exposureSelection = await p.select({
+      message: "Exposure profile",
+      options: [
+        {
+          value: "private",
+          label: "Private network",
+          hint: "Private access only, with automatic URL handling",
+        },
+        {
+          value: "public",
+          label: "Public internet",
+          hint: "Internet-facing deployment with explicit public URL requirements",
+        },
+      ],
+      initialValue: currentServer?.exposure ?? "private",
+    });
+    if (p.isCancel(exposureSelection)) cancelled();
+    exposure = exposureSelection as ServerConfig["exposure"];
+  }
+
+  const defaultHost =
+    currentServer?.customBindHost ??
+    currentServer?.host ??
+    (deploymentMode === "local_trusted" ? "127.0.0.1" : "0.0.0.0");
+  const host = await p.text({
+    message: "Bind host",
+    defaultValue: defaultHost,
+    placeholder: defaultHost,
+    validate: (val) => {
+      if (!val.trim()) return "Host is required";
+      if (deploymentMode === "local_trusted" && !isLoopbackHost(val.trim())) {
+        return "Local trusted mode requires a loopback host such as 127.0.0.1";
+      }
+    },
+  });
+
+  if (p.isCancel(host)) cancelled();
+
   let allowedHostnames: string[] = [];
   if (deploymentMode === "authenticated" && exposure === "private") {
     const allowedHostnamesInput = await p.text({
-      message: "Allowed hostnames (comma-separated, optional)",
+      message: "Allowed private hostnames (comma-separated, optional)",
       defaultValue: (currentServer?.allowedHostnames ?? []).join(", "),
       placeholder: "dotta-macbook-pro, your-host.tailnet.ts.net",
       validate: (val) => {
@@ -105,15 +178,11 @@ export async function promptServer(opts?: {
       },
     });
 
-    if (p.isCancel(allowedHostnamesInput)) {
-      p.cancel("Setup cancelled.");
-      process.exit(0);
-    }
+    if (p.isCancel(allowedHostnamesInput)) cancelled();
     allowedHostnames = parseHostnameCsv(allowedHostnamesInput);
   }
 
-  const port = Number(portStr) || 3100;
-  let auth: AuthConfig = { baseUrlMode: "auto", disableSignUp: false };
+  let publicBaseUrl: string | undefined;
   if (deploymentMode === "authenticated" && exposure === "public") {
     const urlInput = await p.text({
       message: "Public base URL",
@@ -133,32 +202,17 @@ export async function promptServer(opts?: {
         }
       },
     });
-    if (p.isCancel(urlInput)) {
-      p.cancel("Setup cancelled.");
-      process.exit(0);
-    }
-    auth = {
-      baseUrlMode: "explicit",
-      disableSignUp: false,
-      publicBaseUrl: urlInput.trim().replace(/\/+$/, ""),
-    };
-  } else if (currentAuth?.baseUrlMode === "explicit" && currentAuth.publicBaseUrl) {
-    auth = {
-      baseUrlMode: "explicit",
-      disableSignUp: false,
-      publicBaseUrl: currentAuth.publicBaseUrl,
-    };
+    if (p.isCancel(urlInput)) cancelled();
+    publicBaseUrl = urlInput.trim().replace(/\/+$/, "");
   }
 
-  return {
-    server: {
-      deploymentMode,
-      exposure,
-      host: hostStr.trim(),
-      port,
-      allowedHostnames,
-      serveUi: currentServer?.serveUi ?? true,
-    },
-    auth,
-  };
+  return buildCustomServerConfig({
+    deploymentMode,
+    exposure,
+    host: host.trim(),
+    port,
+    allowedHostnames,
+    serveUi,
+    publicBaseUrl,
+  });
 }
diff --git a/doc/CLI.md b/doc/CLI.md
index 6f945656..c124b447 100644
--- a/doc/CLI.md
+++ b/doc/CLI.md
@@ -32,10 +32,12 @@ Mode taxonomy and design intent are documented in `doc/DEPLOYMENT-MODES.md`.
 Current CLI behavior:
 
 - `paperclipai onboard` and `paperclipai configure --section server` set deployment mode in config
+- server onboarding/configure ask for reachability intent and write `server.bind`
+- `paperclipai run --bind <loopback|lan|tailnet>` passes a quickstart bind preset into first-run onboarding when config is missing
 - runtime can override mode with `PAPERCLIP_DEPLOYMENT_MODE`
-- `paperclipai run` and `paperclipai doctor` do not yet expose a direct `--mode` flag
+- `paperclipai run` and `paperclipai doctor` still do not expose a direct low-level `--mode` flag
 
-Target behavior (planned) is documented in `doc/DEPLOYMENT-MODES.md` section 5.
+Canonical behavior is documented in `doc/DEPLOYMENT-MODES.md`.
 
 Allow an authenticated/private hostname (for example custom Tailscale DNS):
 
diff --git a/doc/DEPLOYMENT-MODES.md b/doc/DEPLOYMENT-MODES.md
index 9d58d50a..a7b8d7fb 100644
--- a/doc/DEPLOYMENT-MODES.md
+++ b/doc/DEPLOYMENT-MODES.md
@@ -17,6 +17,11 @@ Paperclip supports two runtime modes:
 
 This keeps one authenticated auth stack while still separating low-friction private-network defaults from internet-facing hardening requirements.
 
+Paperclip now treats **bind** as a separate concern from auth:
+
+- auth model: `local_trusted` vs `authenticated`, plus `private/public`
+- reachability model: `server.bind = loopback | lan | tailnet | custom`
+
 ## 2. Canonical Model
 
 | Runtime Mode | Exposure | Human auth | Primary use |
@@ -25,6 +30,15 @@ This keeps one authenticated auth stack while still separating low-friction priv
 | `authenticated` | `private` | Login required | Private-network access (for example Tailscale/VPN/LAN) |
 | `authenticated` | `public` | Login required | Internet-facing/cloud deployment |
 
+## Reachability Model
+
+| Bind | Meaning | Typical use |
+|---|---|---|
+| `loopback` | Listen on localhost only | default local usage, reverse-proxy deployments |
+| `lan` | Listen on all interfaces (`0.0.0.0`) | LAN/VPN/private-network access |
+| `tailnet` | Listen on a detected Tailscale IP | Tailscale-only access |
+| `custom` | Listen on an explicit host/IP | advanced interface-specific setups |
+
 ## 3. Security Policy
 
 ## `local_trusted`
@@ -38,12 +52,14 @@ This keeps one authenticated auth stack while still separating low-friction priv
 - login required
 - low-friction URL handling (`auto` base URL mode)
 - private-host trust policy required
+- bind can be `loopback`, `lan`, `tailnet`, or `custom`
 
 ## `authenticated + public`
 
 - login required
 - explicit public URL required
 - stricter deployment checks and failures in doctor
+- recommended bind is `loopback` behind a reverse proxy; direct `lan/custom` is advanced
 
 ## 4. Onboarding UX Contract
 
@@ -55,14 +71,22 @@ pnpm paperclipai onboard
 
 Server prompt behavior:
 
-1. ask mode, default `local_trusted`
-2. option copy:
-- `local_trusted`: "Easiest for local setup (no login, localhost-only)"
-- `authenticated`: "Login required; use for private network or public hosting"
-3. if `authenticated`, ask exposure:
-- `private`: "Private network access (for example Tailscale), lower setup friction"
-- `public`: "Internet-facing deployment, stricter security requirements"
-4. ask explicit public URL only for `authenticated + public`
+1. quickstart `--yes` defaults to `server.bind=loopback` and therefore `local_trusted/private`
+2. advanced server setup asks reachability first:
+- `Trusted local` → `bind=loopback`, `local_trusted/private`
+- `Private network` → `bind=lan`, `authenticated/private`
+- `Tailnet` → `bind=tailnet`, `authenticated/private`
+- `Custom` → manual mode/exposure/host entry
+3. raw host entry is only required for the `Custom` path
+4. explicit public URL is only required for `authenticated + public`
+
+Examples:
+
+```sh
+pnpm paperclipai onboard --yes
+pnpm paperclipai onboard --yes --bind lan
+pnpm paperclipai run --bind tailnet
+```
 
 `configure --section server` follows the same interactive behavior.
 
diff --git a/doc/DEVELOPING.md b/doc/DEVELOPING.md
index f7e17195..dd203196 100644
--- a/doc/DEVELOPING.md
+++ b/doc/DEVELOPING.md
@@ -55,10 +55,23 @@ pnpm dev:stop
 Tailscale/private-auth dev mode:
 
 ```sh
-pnpm dev --tailscale-auth
+pnpm dev --bind lan
 ```
 
-This runs dev as `authenticated/private` and binds the server to `0.0.0.0` for private-network access.
+This runs dev as `authenticated/private` with a private-network bind preset.
+
+For Tailscale-only reachability on a detected tailnet address:
+
+```sh
+pnpm dev --bind tailnet
+```
+
+Legacy aliases still map to the old broad private-network behavior:
+
+```sh
+pnpm dev --tailscale-auth
+pnpm dev --authenticated-private
+```
 
 Allow additional private hostnames (for example custom Tailscale hostnames):
 
diff --git a/doc/OPENCLAW_ONBOARDING.md b/doc/OPENCLAW_ONBOARDING.md
index bdb098b3..32f27ea9 100644
--- a/doc/OPENCLAW_ONBOARDING.md
+++ b/doc/OPENCLAW_ONBOARDING.md
@@ -3,7 +3,7 @@ Use this exact checklist.
 1. Start Paperclip in auth mode.
 ```bash
 cd <paperclip-repo-root>
-pnpm dev --tailscale-auth
+pnpm dev --bind lan
 ```
 Then verify:
 ```bash
diff --git a/docs/cli/setup-commands.md b/docs/cli/setup-commands.md
index 448ab7bb..bb3cf17f 100644
--- a/docs/cli/setup-commands.md
+++ b/docs/cli/setup-commands.md
@@ -89,6 +89,8 @@ Show resolved environment configuration:
 pnpm paperclipai env
 ```
 
+This now includes bind-oriented deployment settings such as `PAPERCLIP_BIND` and `PAPERCLIP_BIND_HOST` when configured.
+
 ## `paperclipai allowed-hostname`
 
 Allow a private hostname for authenticated/private mode:
diff --git a/docs/deploy/deployment-modes.md b/docs/deploy/deployment-modes.md
index ae567f49..7d5e6032 100644
--- a/docs/deploy/deployment-modes.md
+++ b/docs/deploy/deployment-modes.md
@@ -3,13 +3,14 @@ title: Deployment Modes
 summary: local_trusted vs authenticated (private/public)
 ---
 
-Paperclip supports two runtime modes with different security profiles.
+Paperclip supports two runtime modes with different security profiles. Reachability is configured separately with `bind`.
 
 ## `local_trusted`
 
 The default mode. Optimized for single-operator local use.
 
 - **Host binding**: loopback only (localhost)
+- **Bind**: `loopback`
 - **Authentication**: no login required
 - **Use case**: local development, solo experimentation
 - **Board identity**: auto-created local board user
@@ -31,6 +32,7 @@ For private network access (Tailscale, VPN, LAN).
 - **Authentication**: login required via Better Auth
 - **URL handling**: auto base URL mode (lower friction)
 - **Host trust**: private-host trust policy required
+- **Bind**: choose `loopback`, `lan`, `tailnet`, or `custom`
 
 ```sh
 pnpm paperclipai onboard
@@ -50,6 +52,7 @@ For internet-facing deployment.
 - **Authentication**: login required
 - **URL**: explicit public URL required
 - **Security**: stricter deployment checks in doctor
+- **Bind**: usually `loopback` behind a reverse proxy; `lan/custom` is advanced
 
 ```sh
 pnpm paperclipai onboard
@@ -81,5 +84,5 @@ pnpm paperclipai configure --section server
 Runtime override via environment variable:
 
 ```sh
-PAPERCLIP_DEPLOYMENT_MODE=authenticated pnpm paperclipai run
+PAPERCLIP_DEPLOYMENT_MODE=authenticated PAPERCLIP_BIND=lan pnpm paperclipai run
 ```
diff --git a/docs/deploy/environment-variables.md b/docs/deploy/environment-variables.md
index bc5e4bcc..5ebef728 100644
--- a/docs/deploy/environment-variables.md
+++ b/docs/deploy/environment-variables.md
@@ -10,11 +10,14 @@ All environment variables that Paperclip uses for server configuration.
 | Variable | Default | Description |
 |----------|---------|-------------|
 | `PORT` | `3100` | Server port |
-| `HOST` | `127.0.0.1` | Server host binding |
+| `PAPERCLIP_BIND` | `loopback` | Reachability preset: `loopback`, `lan`, `tailnet`, or `custom` |
+| `PAPERCLIP_BIND_HOST` | (unset) | Required when `PAPERCLIP_BIND=custom` |
+| `HOST` | `127.0.0.1` | Legacy host override; prefer `PAPERCLIP_BIND` for new setups |
 | `DATABASE_URL` | (embedded) | PostgreSQL connection string |
 | `PAPERCLIP_HOME` | `~/.paperclip` | Base directory for all Paperclip data |
 | `PAPERCLIP_INSTANCE_ID` | `default` | Instance identifier (for multiple local instances) |
 | `PAPERCLIP_DEPLOYMENT_MODE` | `local_trusted` | Runtime mode override |
+| `PAPERCLIP_DEPLOYMENT_EXPOSURE` | `private` | Exposure policy when deployment mode is `authenticated` |
 
 ## Secrets
 
diff --git a/docs/deploy/local-development.md b/docs/deploy/local-development.md
index 874477c1..3bc42334 100644
--- a/docs/deploy/local-development.md
+++ b/docs/deploy/local-development.md
@@ -38,19 +38,26 @@ This does:
 2. Runs `paperclipai doctor` with repair enabled
 3. Starts the server when checks pass
 
-## Tailscale/Private Auth Dev Mode
+## Bind Presets In Dev
 
-To run in `authenticated/private` mode for network access:
+Default `pnpm dev` stays in `local_trusted` with loopback-only binding.
+
+To open Paperclip to a private network with login enabled:
+
+```sh
+pnpm dev --bind lan
+```
+
+For Tailscale-only binding on a detected tailnet address:
+
+```sh
+pnpm dev --bind tailnet
+```
+
+Legacy aliases still work and map to the older broad private-network behavior:
 
 ```sh
 pnpm dev --tailscale-auth
-```
-
-This binds the server to `0.0.0.0` for private-network access.
-
-Alias:
-
-```sh
 pnpm dev --authenticated-private
 ```
 
diff --git a/docs/deploy/tailscale-private-access.md b/docs/deploy/tailscale-private-access.md
index 1e0d2467..bb40fa30 100644
--- a/docs/deploy/tailscale-private-access.md
+++ b/docs/deploy/tailscale-private-access.md
@@ -1,6 +1,6 @@
 ---
 title: Tailscale Private Access
-summary: Run Paperclip with Tailscale-friendly host binding and connect from other devices
+summary: Run Paperclip with Tailscale-friendly bind presets and connect from other devices
 ---
 
 Use this when you want to access Paperclip over Tailscale (or a private LAN/VPN) instead of only `localhost`.
@@ -8,20 +8,25 @@ Use this when you want to access Paperclip over Tailscale (or a private LAN/VPN)
 ## 1. Start Paperclip in private authenticated mode
 
 ```sh
-pnpm dev --tailscale-auth
+pnpm dev --bind tailnet
 ```
 
-This configures:
+Recommended behavior:
 
 - `PAPERCLIP_DEPLOYMENT_MODE=authenticated`
 - `PAPERCLIP_DEPLOYMENT_EXPOSURE=private`
-- `PAPERCLIP_AUTH_BASE_URL_MODE=auto`
-- `HOST=0.0.0.0` (bind on all interfaces)
+- `PAPERCLIP_BIND=tailnet`
 
-Equivalent flag:
+If you want the old broad private-network behavior instead, use:
 
 ```sh
+pnpm dev --bind lan
+```
+
+Legacy aliases still map to `authenticated/private + bind=lan`:
+
 pnpm dev --authenticated-private
+pnpm dev --tailscale-auth
 ```
 
 ## 2. Find your reachable Tailscale address
@@ -73,5 +78,5 @@ Expected result:
 ## Troubleshooting
 
 - Login or redirect errors on a private hostname: add it with `paperclipai allowed-hostname`.
-- App only works on `localhost`: make sure you started with `--tailscale-auth` (or set `HOST=0.0.0.0` in private mode).
+- App only works on `localhost`: make sure you started with `--bind lan` or `--bind tailnet` instead of plain `pnpm dev`.
 - Can connect locally but not remotely: verify both devices are on the same Tailscale network and port `3100` is reachable.
diff --git a/packages/adapters/openclaw-gateway/doc/ONBOARDING_AND_TEST_PLAN.md b/packages/adapters/openclaw-gateway/doc/ONBOARDING_AND_TEST_PLAN.md
index 66ff2a4a..7382c67a 100644
--- a/packages/adapters/openclaw-gateway/doc/ONBOARDING_AND_TEST_PLAN.md
+++ b/packages/adapters/openclaw-gateway/doc/ONBOARDING_AND_TEST_PLAN.md
@@ -66,7 +66,7 @@ OPENCLAW_RESET_STATE=1 OPENCLAW_BUILD=1 ./scripts/smoke/openclaw-docker-ui.sh
 
 ### 1) Start Paperclip
 ```bash
-pnpm dev --tailscale-auth
+pnpm dev --bind lan
 curl -fsS http://127.0.0.1:3100/api/health
 ```
 
diff --git a/packages/shared/src/config-schema.ts b/packages/shared/src/config-schema.ts
index 2399ceae..efa1bdee 100644
--- a/packages/shared/src/config-schema.ts
+++ b/packages/shared/src/config-schema.ts
@@ -1,11 +1,13 @@
 import { z } from "zod";
 import {
   AUTH_BASE_URL_MODES,
+  BIND_MODES,
   DEPLOYMENT_EXPOSURES,
   DEPLOYMENT_MODES,
   SECRET_PROVIDERS,
   STORAGE_PROVIDERS,
 } from "./constants.js";
+import { validateConfiguredBindMode } from "./network-bind.js";
 
 export const configMetaSchema = z.object({
   version: z.literal(1),
@@ -46,6 +48,8 @@ export const loggingConfigSchema = z.object({
 export const serverConfigSchema = z.object({
   deploymentMode: z.enum(DEPLOYMENT_MODES).default("local_trusted"),
   exposure: z.enum(DEPLOYMENT_EXPOSURES).default("private"),
+  bind: z.enum(BIND_MODES).optional(),
+  customBindHost: z.string().optional(),
   host: z.string().default("127.0.0.1"),
   port: z.number().int().min(1).max(65535).default(3100),
   allowedHostnames: z.array(z.string().min(1)).default([]),
@@ -132,15 +136,26 @@ export const paperclipConfigSchema = z
     }),
   })
   .superRefine((value, ctx) => {
-    if (value.server.deploymentMode === "local_trusted") {
-      if (value.server.exposure !== "private") {
-        ctx.addIssue({
-          code: z.ZodIssueCode.custom,
-          message: "server.exposure must be private when deploymentMode is local_trusted",
-          path: ["server", "exposure"],
-        });
-      }
-      return;
+    if (value.server.deploymentMode === "local_trusted" && value.server.exposure !== "private") {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: "server.exposure must be private when deploymentMode is local_trusted",
+        path: ["server", "exposure"],
+      });
+    }
+
+    for (const message of validateConfiguredBindMode({
+      deploymentMode: value.server.deploymentMode,
+      deploymentExposure: value.server.exposure,
+      bind: value.server.bind,
+      host: value.server.host,
+      customBindHost: value.server.customBindHost,
+    })) {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message,
+        path: message.includes("customBindHost") ? ["server", "customBindHost"] : ["server", "bind"],
+      });
     }
 
     if (value.auth.baseUrlMode === "explicit" && !value.auth.publicBaseUrl) {
diff --git a/packages/shared/src/constants.ts b/packages/shared/src/constants.ts
index 521ccf38..f62d2777 100644
--- a/packages/shared/src/constants.ts
+++ b/packages/shared/src/constants.ts
@@ -7,6 +7,9 @@ export type DeploymentMode = (typeof DEPLOYMENT_MODES)[number];
 export const DEPLOYMENT_EXPOSURES = ["private", "public"] as const;
 export type DeploymentExposure = (typeof DEPLOYMENT_EXPOSURES)[number];
 
+export const BIND_MODES = ["loopback", "lan", "tailnet", "custom"] as const;
+export type BindMode = (typeof BIND_MODES)[number];
+
 export const AUTH_BASE_URL_MODES = ["auto", "explicit"] as const;
 export type AuthBaseUrlMode = (typeof AUTH_BASE_URL_MODES)[number];
 
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 36505ece..8ec63026 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -3,6 +3,7 @@ export {
   COMPANY_STATUSES,
   DEPLOYMENT_MODES,
   DEPLOYMENT_EXPOSURES,
+  BIND_MODES,
   AUTH_BASE_URL_MODES,
   AGENT_STATUSES,
   AGENT_ADAPTER_TYPES,
@@ -79,6 +80,7 @@ export {
   type CompanyStatus,
   type DeploymentMode,
   type DeploymentExposure,
+  type BindMode,
   type AuthBaseUrlMode,
   type AgentStatus,
   type AgentAdapterType,
@@ -149,6 +151,16 @@ export {
   type PluginBridgeErrorCode,
 } from "./constants.js";
 
+export {
+  ALL_INTERFACES_BIND_HOST,
+  LOOPBACK_BIND_HOST,
+  inferBindModeFromHost,
+  isAllInterfacesHost,
+  isLoopbackHost,
+  resolveRuntimeBind,
+  validateConfiguredBindMode,
+} from "./network-bind.js";
+
 export type {
   Company,
   FeedbackVote,
diff --git a/packages/shared/src/network-bind.ts b/packages/shared/src/network-bind.ts
new file mode 100644
index 00000000..eeda9c50
--- /dev/null
+++ b/packages/shared/src/network-bind.ts
@@ -0,0 +1,105 @@
+import type { BindMode, DeploymentExposure, DeploymentMode } from "./constants.js";
+
+export const LOOPBACK_BIND_HOST = "127.0.0.1";
+export const ALL_INTERFACES_BIND_HOST = "0.0.0.0";
+
+function normalizeHost(host: string | null | undefined): string | undefined {
+  const trimmed = host?.trim();
+  return trimmed ? trimmed : undefined;
+}
+
+export function isLoopbackHost(host: string | null | undefined): boolean {
+  const normalized = normalizeHost(host)?.toLowerCase();
+  return normalized === "127.0.0.1" || normalized === "localhost" || normalized === "::1";
+}
+
+export function isAllInterfacesHost(host: string | null | undefined): boolean {
+  const normalized = normalizeHost(host)?.toLowerCase();
+  return normalized === "0.0.0.0" || normalized === "::";
+}
+
+export function inferBindModeFromHost(
+  host: string | null | undefined,
+  opts?: { tailnetBindHost?: string | null | undefined },
+): BindMode {
+  const normalized = normalizeHost(host);
+  const tailnetBindHost = normalizeHost(opts?.tailnetBindHost);
+
+  if (!normalized || isLoopbackHost(normalized)) return "loopback";
+  if (isAllInterfacesHost(normalized)) return "lan";
+  if (tailnetBindHost && normalized === tailnetBindHost) return "tailnet";
+  return "custom";
+}
+
+export function validateConfiguredBindMode(input: {
+  deploymentMode: DeploymentMode;
+  deploymentExposure: DeploymentExposure;
+  bind?: BindMode | null | undefined;
+  host?: string | null | undefined;
+  customBindHost?: string | null | undefined;
+}): string[] {
+  const bind = input.bind ?? inferBindModeFromHost(input.host);
+  const customBindHost = normalizeHost(input.customBindHost);
+  const errors: string[] = [];
+
+  if (input.deploymentMode === "local_trusted" && bind !== "loopback") {
+    errors.push("local_trusted requires server.bind=loopback");
+  }
+
+  if (bind === "custom" && !customBindHost) {
+    const legacyHost = normalizeHost(input.host);
+    if (!legacyHost || isLoopbackHost(legacyHost) || isAllInterfacesHost(legacyHost)) {
+      errors.push("server.customBindHost is required when server.bind=custom");
+    }
+  }
+
+  if (input.deploymentMode === "authenticated" && input.deploymentExposure === "public" && bind === "tailnet") {
+    errors.push("server.bind=tailnet is only supported for authenticated/private deployments");
+  }
+
+  return errors;
+}
+
+export function resolveRuntimeBind(input: {
+  bind?: BindMode | null | undefined;
+  host?: string | null | undefined;
+  customBindHost?: string | null | undefined;
+  tailnetBindHost?: string | null | undefined;
+}): {
+  bind: BindMode;
+  host: string;
+  customBindHost?: string;
+  errors: string[];
+} {
+  const bind = input.bind ?? inferBindModeFromHost(input.host, { tailnetBindHost: input.tailnetBindHost });
+  const legacyHost = normalizeHost(input.host);
+  const customBindHost =
+    normalizeHost(input.customBindHost) ??
+    (bind === "custom" && legacyHost && !isLoopbackHost(legacyHost) && !isAllInterfacesHost(legacyHost)
+      ? legacyHost
+      : undefined);
+
+  switch (bind) {
+    case "loopback":
+      return { bind, host: LOOPBACK_BIND_HOST, customBindHost, errors: [] };
+    case "lan":
+      return { bind, host: ALL_INTERFACES_BIND_HOST, customBindHost, errors: [] };
+    case "custom":
+      return customBindHost
+        ? { bind, host: customBindHost, customBindHost, errors: [] }
+        : { bind, host: legacyHost ?? LOOPBACK_BIND_HOST, errors: ["server.customBindHost is required when server.bind=custom"] };
+    case "tailnet": {
+      const tailnetBindHost = normalizeHost(input.tailnetBindHost);
+      return tailnetBindHost
+        ? { bind, host: tailnetBindHost, customBindHost, errors: [] }
+        : {
+          bind,
+          host: legacyHost ?? LOOPBACK_BIND_HOST,
+          customBindHost,
+          errors: [
+            "server.bind=tailnet requires a detected Tailscale address or PAPERCLIP_TAILNET_BIND_HOST",
+          ],
+        };
+    }
+  }
+}
diff --git a/scripts/dev-runner.ts b/scripts/dev-runner.ts
index 756a6b92..ba68f039 100644
--- a/scripts/dev-runner.ts
+++ b/scripts/dev-runner.ts
@@ -4,6 +4,7 @@ import { existsSync, mkdirSync, readdirSync, rmSync, statSync, writeFileSync } f
 import path from "node:path";
 import { createInterface } from "node:readline/promises";
 import { stdin, stdout } from "node:process";
+import { BIND_MODES, type BindMode } from "@paperclipai/shared";
 import { createCapturedOutputBuffer, parseJsonResponseWithLimit } from "./dev-runner-output.mjs";
 import { shouldTrackDevServerPath } from "./dev-runner-paths.mjs";
 import { createDevServiceIdentity, repoRoot } from "./dev-service-profile.ts";
@@ -62,13 +63,36 @@ const tailscaleAuthFlagNames = new Set([
 ]);
 
 let tailscaleAuth = false;
+let bindMode: BindMode | null = null;
+let bindHost: string | null = null;
 const forwardedArgs: string[] = [];
 
-for (const arg of cliArgs) {
+for (let index = 0; index < cliArgs.length; index += 1) {
+  const arg = cliArgs[index];
   if (tailscaleAuthFlagNames.has(arg)) {
     tailscaleAuth = true;
     continue;
   }
+  if (arg === "--bind") {
+    const value = cliArgs[index + 1];
+    if (!value || value.startsWith("--") || !BIND_MODES.includes(value as BindMode)) {
+      console.error(`[paperclip] invalid --bind value. Use one of: ${BIND_MODES.join(", ")}`);
+      process.exit(1);
+    }
+    bindMode = value as BindMode;
+    index += 1;
+    continue;
+  }
+  if (arg === "--bind-host") {
+    const value = cliArgs[index + 1];
+    if (!value || value.startsWith("--")) {
+      console.error("[paperclip] --bind-host requires a value");
+      process.exit(1);
+    }
+    bindHost = value;
+    index += 1;
+    continue;
+  }
   forwardedArgs.push(arg);
 }
 
@@ -78,6 +102,16 @@ if (process.env.npm_config_tailscale_auth === "true") {
 if (process.env.npm_config_authenticated_private === "true") {
   tailscaleAuth = true;
 }
+if (!bindMode && process.env.npm_config_bind && BIND_MODES.includes(process.env.npm_config_bind as BindMode)) {
+  bindMode = process.env.npm_config_bind as BindMode;
+}
+if (!bindHost && process.env.npm_config_bind_host) {
+  bindHost = process.env.npm_config_bind_host;
+}
+if (bindMode === "custom" && !bindHost) {
+  console.error("[paperclip] --bind custom requires --bind-host <host>");
+  process.exit(1);
+}
 
 const env: NodeJS.ProcessEnv = {
   ...process.env,
@@ -94,13 +128,36 @@ if (mode === "watch") {
   env.PAPERCLIP_MIGRATION_AUTO_APPLY ??= "true";
 }
 
-if (tailscaleAuth) {
-  env.PAPERCLIP_DEPLOYMENT_MODE = "authenticated";
-  env.PAPERCLIP_DEPLOYMENT_EXPOSURE = "private";
-  env.PAPERCLIP_AUTH_BASE_URL_MODE = "auto";
-  env.HOST = "0.0.0.0";
-  console.log("[paperclip] dev mode: authenticated/private (tailscale-friendly) on 0.0.0.0");
+if (tailscaleAuth || bindMode) {
+  const effectiveBind = bindMode ?? "lan";
+  if (tailscaleAuth) {
+    console.log("[paperclip] note: --tailscale-auth/--authenticated-private are legacy aliases for --bind lan");
+  }
+  env.PAPERCLIP_BIND = effectiveBind;
+  if (bindHost) {
+    env.PAPERCLIP_BIND_HOST = bindHost;
+  } else {
+    delete env.PAPERCLIP_BIND_HOST;
+  }
+  if (effectiveBind === "loopback" && !tailscaleAuth) {
+    delete env.PAPERCLIP_DEPLOYMENT_MODE;
+    delete env.PAPERCLIP_DEPLOYMENT_EXPOSURE;
+    delete env.PAPERCLIP_AUTH_BASE_URL_MODE;
+    console.log("[paperclip] dev mode: local_trusted (bind=loopback)");
+  } else {
+    env.PAPERCLIP_DEPLOYMENT_MODE = "authenticated";
+    env.PAPERCLIP_DEPLOYMENT_EXPOSURE = "private";
+    env.PAPERCLIP_AUTH_BASE_URL_MODE = "auto";
+    console.log(
+      `[paperclip] dev mode: authenticated/private (bind=${effectiveBind}${bindHost ? `:${bindHost}` : ""})`,
+    );
+  }
 } else {
+  delete env.PAPERCLIP_BIND;
+  delete env.PAPERCLIP_BIND_HOST;
+  delete env.PAPERCLIP_DEPLOYMENT_MODE;
+  delete env.PAPERCLIP_DEPLOYMENT_EXPOSURE;
+  delete env.PAPERCLIP_AUTH_BASE_URL_MODE;
   console.log("[paperclip] dev mode: local_trusted (default)");
 }
 
@@ -108,7 +165,7 @@ const serverPort = Number.parseInt(env.PORT ?? process.env.PORT ?? "3100", 10) |
 const devService = createDevServiceIdentity({
   mode,
   forwardedArgs,
-  tailscaleAuth,
+  networkProfile: tailscaleAuth ? `legacy:${bindMode ?? "lan"}` : (bindMode ?? "default"),
   port: serverPort,
 });
 
diff --git a/scripts/dev-service-profile.ts b/scripts/dev-service-profile.ts
index 9c129b34..90efb322 100644
--- a/scripts/dev-service-profile.ts
+++ b/scripts/dev-service-profile.ts
@@ -8,7 +8,7 @@ export const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)
 export function createDevServiceIdentity(input: {
   mode: "watch" | "dev";
   forwardedArgs: string[];
-  tailscaleAuth: boolean;
+  networkProfile: string;
   port: number;
 }) {
   const envFingerprint = createHash("sha256")
@@ -16,7 +16,7 @@ export function createDevServiceIdentity(input: {
       JSON.stringify({
         mode: input.mode,
         forwardedArgs: input.forwardedArgs,
-        tailscaleAuth: input.tailscaleAuth,
+        networkProfile: input.networkProfile,
         port: input.port,
       }),
     )
diff --git a/scripts/provision-worktree.sh b/scripts/provision-worktree.sh
index 93e6a2d6..9fbd3ccc 100644
--- a/scripts/provision-worktree.sh
+++ b/scripts/provision-worktree.sh
@@ -237,6 +237,8 @@ async function main() {
     server: {
       deploymentMode: sourceConfig?.server?.deploymentMode ?? "local_trusted",
       exposure: sourceConfig?.server?.exposure ?? "private",
+      ...(sourceConfig?.server?.bind ? { bind: sourceConfig.server.bind } : {}),
+      ...(sourceConfig?.server?.customBindHost ? { customBindHost: sourceConfig.server.customBindHost } : {}),
       host: sourceConfig?.server?.host ?? "127.0.0.1",
       port: serverPort,
       allowedHostnames: sourceConfig?.server?.allowedHostnames ?? [],
diff --git a/server/src/__tests__/server-startup-feedback-export.test.ts b/server/src/__tests__/server-startup-feedback-export.test.ts
index 78565645..056e812a 100644
--- a/server/src/__tests__/server-startup-feedback-export.test.ts
+++ b/server/src/__tests__/server-startup-feedback-export.test.ts
@@ -66,6 +66,8 @@ vi.mock("../config.js", () => ({
   loadConfig: vi.fn(() => ({
     deploymentMode: "authenticated",
     deploymentExposure: "private",
+    bind: "loopback",
+    customBindHost: undefined,
     host: "127.0.0.1",
     port: 3210,
     allowedHostnames: [],
diff --git a/server/src/config.ts b/server/src/config.ts
index 5ae50400..9be5c21a 100644
--- a/server/src/config.ts
+++ b/server/src/config.ts
@@ -1,4 +1,5 @@
 import { readConfigFile } from "./config-file.js";
+import { execFileSync } from "node:child_process";
 import { existsSync, realpathSync } from "node:fs";
 import { resolve } from "node:path";
 import { config as loadDotenv } from "dotenv";
@@ -6,15 +7,20 @@ import { resolvePaperclipEnvPath } from "./paths.js";
 import { maybeRepairLegacyWorktreeConfigAndEnvFiles } from "./worktree-config.js";
 import {
   AUTH_BASE_URL_MODES,
+  BIND_MODES,
   DEPLOYMENT_EXPOSURES,
   DEPLOYMENT_MODES,
   SECRET_PROVIDERS,
   STORAGE_PROVIDERS,
+  type BindMode,
   type AuthBaseUrlMode,
   type DeploymentExposure,
   type DeploymentMode,
   type SecretProvider,
   type StorageProvider,
+  inferBindModeFromHost,
+  resolveRuntimeBind,
+  validateConfiguredBindMode,
 } from "@paperclipai/shared";
 import {
   resolveDefaultBackupDir,
@@ -44,6 +50,8 @@ type DatabaseMode = "embedded-postgres" | "postgres";
 export interface Config {
   deploymentMode: DeploymentMode;
   deploymentExposure: DeploymentExposure;
+  bind: BindMode;
+  customBindHost: string | undefined;
   host: string;
   port: number;
   allowedHostnames: string[];
@@ -78,6 +86,24 @@ export interface Config {
   telemetryEnabled: boolean;
 }
 
+function detectTailnetBindHost(): string | undefined {
+  const explicit = process.env.PAPERCLIP_TAILNET_BIND_HOST?.trim();
+  if (explicit) return explicit;
+
+  try {
+    const stdout = execFileSync("tailscale", ["ip", "-4"], {
+      encoding: "utf8",
+      stdio: ["ignore", "pipe", "ignore"],
+    });
+    return stdout
+      .split(/\r?\n/)
+      .map((line) => line.trim())
+      .find(Boolean);
+  } catch {
+    return undefined;
+  }
+}
+
 export function loadConfig(): Config {
   const fileConfig = readConfigFile();
   const fileDatabaseMode =
@@ -148,6 +174,18 @@ export function loadConfig(): Config {
     deploymentMode === "local_trusted"
       ? "private"
       : (deploymentExposureFromEnv ?? fileConfig?.server.exposure ?? "private");
+  const bindFromEnvRaw = process.env.PAPERCLIP_BIND;
+  const bindFromEnv =
+    bindFromEnvRaw && BIND_MODES.includes(bindFromEnvRaw as BindMode)
+      ? (bindFromEnvRaw as BindMode)
+      : null;
+  const configuredHost = process.env.HOST ?? fileConfig?.server.host ?? "127.0.0.1";
+  const tailnetBindHost = detectTailnetBindHost();
+  const bind =
+    bindFromEnv ??
+    fileConfig?.server.bind ??
+    inferBindModeFromHost(configuredHost, { tailnetBindHost });
+  const customBindHost = process.env.PAPERCLIP_BIND_HOST ?? fileConfig?.server.customBindHost;
   const authBaseUrlModeFromEnvRaw = process.env.PAPERCLIP_AUTH_BASE_URL_MODE;
   const authBaseUrlModeFromEnv =
     authBaseUrlModeFromEnvRaw &&
@@ -223,11 +261,32 @@ export function loadConfig(): Config {
       fileDatabaseBackup?.dir ??
       resolveDefaultBackupDir(),
   );
+  const bindValidationErrors = validateConfiguredBindMode({
+    deploymentMode,
+    deploymentExposure,
+    bind,
+    host: configuredHost,
+    customBindHost,
+  });
+  if (bindValidationErrors.length > 0) {
+    throw new Error(bindValidationErrors[0]);
+  }
+  const resolvedBind = resolveRuntimeBind({
+    bind,
+    host: configuredHost,
+    customBindHost,
+    tailnetBindHost,
+  });
+  if (resolvedBind.errors.length > 0) {
+    throw new Error(resolvedBind.errors[0]);
+  }
 
   return {
     deploymentMode,
     deploymentExposure,
-    host: process.env.HOST ?? fileConfig?.server.host ?? "127.0.0.1",
+    bind: resolvedBind.bind,
+    customBindHost: resolvedBind.customBindHost,
+    host: resolvedBind.host,
     port: Number(process.env.PORT) || fileConfig?.server.port || 3100,
     allowedHostnames,
     authBaseUrlMode,
diff --git a/server/src/index.ts b/server/src/index.ts
index 7bf5cea7..0e8db5a6 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -701,9 +701,10 @@ export async function startServer(): Promise<StartedServer> {
             logger.warn({ err, url }, "Failed to open browser on startup");
           });
       }
-      printStartupBanner({
-        host: config.host,
-        deploymentMode: config.deploymentMode,
+        printStartupBanner({
+          bind: config.bind,
+          host: config.host,
+          deploymentMode: config.deploymentMode,
         deploymentExposure: config.deploymentExposure,
         authReady,
         requestedPort: config.port,
diff --git a/server/src/routes/access.ts b/server/src/routes/access.ts
index a53bf0dc..e4893765 100644
--- a/server/src/routes/access.ts
+++ b/server/src/routes/access.ts
@@ -928,7 +928,7 @@ function buildOnboardingDiscoveryDiagnostics(input: {
       code: "openclaw_onboarding_private_loopback_bind",
       level: "warn",
       message: "Paperclip is bound to loopback in authenticated/private mode.",
-      hint: "Run with a reachable bind host or use pnpm dev --tailscale-auth for private-network onboarding."
+      hint: "Use a reachable private bind mode such as `pnpm dev --bind lan` or `pnpm dev --bind tailnet` for private-network onboarding."
     });
   }
 
diff --git a/server/src/startup-banner.ts b/server/src/startup-banner.ts
index 1a52731b..a3ae2ed1 100644
--- a/server/src/startup-banner.ts
+++ b/server/src/startup-banner.ts
@@ -1,6 +1,6 @@
 import { existsSync, readFileSync } from "node:fs";
 import { resolvePaperclipConfigPath, resolvePaperclipEnvPath } from "./paths.js";
-import type { DeploymentExposure, DeploymentMode } from "@paperclipai/shared";
+import type { BindMode, DeploymentExposure, DeploymentMode } from "@paperclipai/shared";
 
 import { parse as parseEnvFileContents } from "dotenv";
 
@@ -18,6 +18,7 @@ type EmbeddedPostgresInfo = {
 };
 
 type StartupBannerOptions = {
+  bind: BindMode;
   host: string;
   deploymentMode: DeploymentMode;
   deploymentExposure: DeploymentExposure;
@@ -148,6 +149,7 @@ export function printStartupBanner(opts: StartupBannerOptions): void {
     color("  ───────────────────────────────────────────────────────", "blue"),
     row("Mode", `${dbMode}  |  ${uiMode}`),
     row("Deploy", `${opts.deploymentMode} (${opts.deploymentExposure})`),
+    row("Bind", `${opts.bind} ${color(`(${opts.host})`, "dim")}`),
     row("Auth", opts.authReady ? color("ready", "green") : color("not-ready", "yellow")),
     row("Server", portValue),
     row("API", `${apiUrl} ${color(`(health: ${apiUrl}/health)`, "dim")}`),