diff --git a/packages/ui/src/components/sections/openchamber/AboutSettings.tsx b/packages/ui/src/components/sections/openchamber/AboutSettings.tsx
index 6bffa19c..95488727 100644
--- a/packages/ui/src/components/sections/openchamber/AboutSettings.tsx
+++ b/packages/ui/src/components/sections/openchamber/AboutSettings.tsx
@@ -9,6 +9,7 @@ import { Icon } from "@/components/icon/Icon";
 import { OpenChamberLogo } from '@/components/ui/OpenChamberLogo';
 import { useI18n } from '@/lib/i18n';
 import { runtimeFetch } from '@/lib/runtime-fetch';
+import { InstanceServiceUrls } from './InstanceServiceUrls';
 import {
   SettingsSection,
   SETTINGS_BRAND_TITLE_CLASS,
@@ -135,6 +136,7 @@ export const AboutSettings: React.FC<AboutSettingsProps> = ({ initialUpdateDialo
             <p>{t('aboutDialog.openChamberVersionLabel', { version: currentVersion })}</p>
             <p>{t('aboutDialog.openCodeVersionLabel', { version: openCodeVersion || t('settings.openchamber.about.state.unknown') })}</p>
           </div>
+          <InstanceServiceUrls />
         </div>
 
         <div className="flex justify-center">
@@ -278,6 +280,11 @@ export const AboutSettings: React.FC<AboutSettingsProps> = ({ initialUpdateDialo
           </div>
         )}
 
+        <div className="flex flex-col gap-2 border-b border-border/40 px-4 py-3 @xl:flex-row @xl:items-center @xl:justify-between">
+          <span className={SETTINGS_FIELD_LABEL_CLASS}>{t('settings.openchamber.about.field.instanceUrls')}</span>
+          <InstanceServiceUrls />
+        </div>
+
         <div className="flex items-center gap-4 px-4 py-4">
           <a
             href={GITHUB_URL}
diff --git a/packages/ui/src/components/sections/openchamber/InstanceServiceUrls.tsx b/packages/ui/src/components/sections/openchamber/InstanceServiceUrls.tsx
new file mode 100644
index 00000000..495a061e
--- /dev/null
+++ b/packages/ui/src/components/sections/openchamber/InstanceServiceUrls.tsx
@@ -0,0 +1,106 @@
+import React from 'react';
+import { useI18n } from '@/lib/i18n';
+import { runtimeFetch } from '@/lib/runtime-fetch';
+import { openExternalUrl } from '@/lib/url';
+import { Button } from '@/components/ui/button';
+import { Icon } from '@/components/icon/Icon';
+
+type InstanceServiceInfo = {
+  port: number | null;
+  tunnelUrl: string | null;
+};
+
+type InstanceService = {
+  key: string;
+  label: string;
+  url: string;
+};
+
+/**
+ * Shows the active instance's service URLs (local server port + tunnel URL,
+ * when a tunnel is active) as labeled buttons that open the URL in the
+ * browser. The data comes from `/api/system/info`, which the server derives
+ * from its own runtime state — this is what makes each Git-worktree instance
+ * distinguishable in the UI without reading terminal output.
+ *
+ * The section stays hidden when the endpoint is unavailable or reports no
+ * port/tunnel (e.g. VS Code runtime), so a failed fetch never renders stale
+ * or wrong URLs.
+ */
+export const InstanceServiceUrls: React.FC = () => {
+  const { t } = useI18n();
+  const [info, setInfo] = React.useState<InstanceServiceInfo | null>(null);
+
+  React.useEffect(() => {
+    let cancelled = false;
+    const controller = typeof AbortController !== 'undefined' ? new AbortController() : undefined;
+
+    const load = async () => {
+      try {
+        const response = await runtimeFetch('/api/system/info', {
+          signal: controller?.signal,
+          headers: { Accept: 'application/json' },
+        });
+        if (!response.ok) return;
+        const data = await response.json().catch(() => null) as { port?: unknown; tunnelUrl?: unknown } | null;
+        if (!data || cancelled) return;
+        const port = typeof data.port === 'number' && Number.isFinite(data.port) && data.port > 0 ? data.port : null;
+        const tunnelUrl = typeof data.tunnelUrl === 'string' && data.tunnelUrl.trim().length > 0
+          ? data.tunnelUrl.trim()
+          : null;
+        setInfo({ port, tunnelUrl });
+      } catch {
+        // Best-effort: a failed fetch keeps the section hidden instead of
+        // showing data we cannot verify.
+      }
+    };
+
+    void load();
+
+    return () => {
+      cancelled = true;
+      controller?.abort();
+    };
+  }, []);
+
+  const services: InstanceService[] = [];
+  if (info?.port !== null && info?.port !== undefined) {
+    services.push({
+      key: 'application',
+      label: t('settings.openchamber.about.field.applicationUrl'),
+      url: `http://localhost:${info.port}/`,
+    });
+  }
+  if (info?.tunnelUrl) {
+    services.push({
+      key: 'tunnel',
+      label: t('settings.openchamber.about.field.tunnelUrl'),
+      url: info.tunnelUrl,
+    });
+  }
+
+  if (services.length === 0) {
+    return null;
+  }
+
+  return (
+    <div className="flex flex-wrap items-center gap-2">
+      {services.map((service) => (
+        <Button
+          key={service.key}
+          type="button"
+          variant="outline"
+          size="sm"
+          title={service.label}
+          className="max-w-full gap-1.5 px-2.5"
+          onClick={() => {
+            void openExternalUrl(service.url);
+          }}
+        >
+          <Icon name="external-link" className="size-3.5 shrink-0" />
+          <span className="max-w-64 truncate font-mono typography-micro">{service.url}</span>
+        </Button>
+      ))}
+    </div>
+  );
+};
diff --git a/packages/ui/src/lib/i18n/messages/de.settings.ts b/packages/ui/src/lib/i18n/messages/de.settings.ts
index 104a37d9..635a6bfd 100644
--- a/packages/ui/src/lib/i18n/messages/de.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/de.settings.ts
@@ -445,6 +445,9 @@ export const settingsDict = {
   'settings.openchamber.about.title': 'Über OpenChamber',
   'settings.openchamber.about.field.version': 'Version',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode-Version',
+  'settings.openchamber.about.field.instanceUrls': 'Instanz-URLs',
+  'settings.openchamber.about.field.applicationUrl': 'Anwendung',
+  'settings.openchamber.about.field.tunnelUrl': 'Tunnel',
   'settings.openchamber.about.state.checking': 'Wird geprüft...',
   'settings.openchamber.about.state.upToDate': 'Aktuell',
   'settings.openchamber.about.state.unknown': 'unbekannt',
diff --git a/packages/ui/src/lib/i18n/messages/en.settings.ts b/packages/ui/src/lib/i18n/messages/en.settings.ts
index c021f305..860c1fc7 100644
--- a/packages/ui/src/lib/i18n/messages/en.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/en.settings.ts
@@ -464,6 +464,9 @@ export const settingsDict = {
   'settings.openchamber.about.title': 'About OpenChamber',
   'settings.openchamber.about.field.version': 'Version',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode version',
+  'settings.openchamber.about.field.instanceUrls': 'Instance URLs',
+  'settings.openchamber.about.field.applicationUrl': 'Application',
+  'settings.openchamber.about.field.tunnelUrl': 'Tunnel',
   'settings.openchamber.about.state.checking': 'Checking...',
   'settings.openchamber.about.state.upToDate': 'Up to date',
   'settings.openchamber.about.state.unknown': 'unknown',
diff --git a/packages/ui/src/lib/i18n/messages/es.settings.ts b/packages/ui/src/lib/i18n/messages/es.settings.ts
index 74db714b..db7149be 100644
--- a/packages/ui/src/lib/i18n/messages/es.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/es.settings.ts
@@ -431,6 +431,9 @@ export const settingsDict = {
   "settings.openchamber.about.title": "Acerca de OpenChamber",
   "settings.openchamber.about.field.version": "Versión",
   "settings.openchamber.about.field.openCodeVersion": "Versión de OpenCode",
+  "settings.openchamber.about.field.instanceUrls": "URLs de la instancia",
+  "settings.openchamber.about.field.applicationUrl": "Aplicación",
+  "settings.openchamber.about.field.tunnelUrl": "Túnel",
   "settings.openchamber.about.state.checking": "Comprobando...",
   "settings.openchamber.about.state.upToDate": "Actualizado",
   "settings.openchamber.about.state.unknown": "desconocido",
diff --git a/packages/ui/src/lib/i18n/messages/fr.settings.ts b/packages/ui/src/lib/i18n/messages/fr.settings.ts
index f0c98448..599edb5d 100644
--- a/packages/ui/src/lib/i18n/messages/fr.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/fr.settings.ts
@@ -2059,6 +2059,9 @@ export const settingsDict = {
   'settings.remoteInstances.relay.toast.offerFailed': 'Échec de la création du lien d’association',
   'settings.remoteInstances.relay.toast.linkCopied': 'Lien d’association copié',
   'settings.openchamber.about.field.openCodeVersion': 'Version d’OpenCode',
+  'settings.openchamber.about.field.instanceUrls': 'URLs de l’instance',
+  'settings.openchamber.about.field.applicationUrl': 'Application',
+  'settings.openchamber.about.field.tunnelUrl': 'Tunnel',
   'settings.openchamber.about.state.unknown': 'inconnue',
   'settings.voice.page.field.ttsInputMode': 'Mode d’entrée TTS',
   'settings.voice.page.field.ttsInputModeSanitized': 'Nettoyé',
diff --git a/packages/ui/src/lib/i18n/messages/ja.settings.ts b/packages/ui/src/lib/i18n/messages/ja.settings.ts
index 0c82f734..d585d198 100644
--- a/packages/ui/src/lib/i18n/messages/ja.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ja.settings.ts
@@ -464,6 +464,9 @@ export const settingsDict = {
   'settings.openchamber.about.title': 'OpenChamber について',
   'settings.openchamber.about.field.version': 'バージョン',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode バージョン',
+  'settings.openchamber.about.field.instanceUrls': 'インスタンスのURL',
+  'settings.openchamber.about.field.applicationUrl': 'アプリケーション',
+  'settings.openchamber.about.field.tunnelUrl': 'トンネル',
   'settings.openchamber.about.state.checking': '確認中...',
   'settings.openchamber.about.state.upToDate': '最新です',
   'settings.openchamber.about.state.unknown': '不明',
diff --git a/packages/ui/src/lib/i18n/messages/ko.settings.ts b/packages/ui/src/lib/i18n/messages/ko.settings.ts
index aa53cbfd..320b6404 100644
--- a/packages/ui/src/lib/i18n/messages/ko.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.settings.ts
@@ -431,6 +431,9 @@ export const settingsDict = {
   'settings.openchamber.about.title': 'OpenChamber 정보',
   'settings.openchamber.about.field.version': '버전',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode 버전',
+  'settings.openchamber.about.field.instanceUrls': '인스턴스 URL',
+  'settings.openchamber.about.field.applicationUrl': '애플리케이션',
+  'settings.openchamber.about.field.tunnelUrl': '터널',
   'settings.openchamber.about.state.checking': '확인 중...',
   'settings.openchamber.about.state.upToDate': '최신 상태',
   'settings.openchamber.about.state.unknown': '알 수 없음',
diff --git a/packages/ui/src/lib/i18n/messages/pl.settings.ts b/packages/ui/src/lib/i18n/messages/pl.settings.ts
index aa3af5d6..0d034d62 100644
--- a/packages/ui/src/lib/i18n/messages/pl.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.settings.ts
@@ -722,6 +722,9 @@ export const settingsDict = {
   'settings.openchamber.about.actions.updateToVersion': 'Aktualizuj do wersji {version}',
   'settings.openchamber.about.field.version': 'Wersja',
   'settings.openchamber.about.field.openCodeVersion': 'Wersja OpenCode',
+  'settings.openchamber.about.field.instanceUrls': 'Adresy URL instancji',
+  'settings.openchamber.about.field.applicationUrl': 'Aplikacja',
+  'settings.openchamber.about.field.tunnelUrl': 'Tunel',
   'settings.openchamber.about.state.checking': 'Sprawdzanie...',
   'settings.openchamber.about.state.upToDate': 'Aktualna wersja',
   'settings.openchamber.about.state.unknown': 'nieznane',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts b/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
index c321f233..41c6acde 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
@@ -431,6 +431,9 @@ export const settingsDict = {
   "settings.openchamber.about.title": "Sobre o OpenChamber",
   "settings.openchamber.about.field.version": "Versão",
   "settings.openchamber.about.field.openCodeVersion": "Versão do OpenCode",
+  "settings.openchamber.about.field.instanceUrls": "URLs da instância",
+  "settings.openchamber.about.field.applicationUrl": "Aplicativo",
+  "settings.openchamber.about.field.tunnelUrl": "Túnel",
   "settings.openchamber.about.state.checking": "Verificando...",
   "settings.openchamber.about.state.upToDate": "Atualizado",
   "settings.openchamber.about.state.unknown": "desconhecido",
diff --git a/packages/ui/src/lib/i18n/messages/uk.settings.ts b/packages/ui/src/lib/i18n/messages/uk.settings.ts
index c5afd784..8cfb24c1 100644
--- a/packages/ui/src/lib/i18n/messages/uk.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.settings.ts
@@ -431,6 +431,9 @@ export const settingsDict = {
   "settings.openchamber.about.title": "Про OpenChamber",
   "settings.openchamber.about.field.version": "Версія",
   "settings.openchamber.about.field.openCodeVersion": "Версія OpenCode",
+  "settings.openchamber.about.field.instanceUrls": "URL-адреси екземпляра",
+  "settings.openchamber.about.field.applicationUrl": "Застосунок",
+  "settings.openchamber.about.field.tunnelUrl": "Тунель",
   "settings.openchamber.about.state.checking": "Перевірка...",
   "settings.openchamber.about.state.upToDate": "В актуальному стані",
   "settings.openchamber.about.state.unknown": "невідомо",
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts b/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
index 2d111132..9fea8ea9 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
@@ -431,6 +431,9 @@ export const settingsDict = {
   'settings.openchamber.about.title': '关于 OpenChamber',
   'settings.openchamber.about.field.version': '版本',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode 版本',
+  'settings.openchamber.about.field.instanceUrls': '实例 URL',
+  'settings.openchamber.about.field.applicationUrl': '应用',
+  'settings.openchamber.about.field.tunnelUrl': '隧道',
   'settings.openchamber.about.state.checking': '检查中...',
   'settings.openchamber.about.state.upToDate': '已是最新',
   'settings.openchamber.about.state.unknown': '未知',
diff --git a/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts b/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
index 4118c83d..54a2294c 100644
--- a/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
@@ -428,6 +428,9 @@
   'settings.openchamber.about.title': '關於 OpenChamber',
   'settings.openchamber.about.field.version': '版本',
   'settings.openchamber.about.field.openCodeVersion': 'OpenCode 版本',
+  'settings.openchamber.about.field.instanceUrls': '執行個體 URL',
+  'settings.openchamber.about.field.applicationUrl': '應用程式',
+  'settings.openchamber.about.field.tunnelUrl': '隧道',
   'settings.openchamber.about.state.checking': '檢查中...',
   'settings.openchamber.about.state.upToDate': '已是最新',
   'settings.openchamber.about.state.unknown': '未知',
diff --git a/packages/web/server/index.js b/packages/web/server/index.js
index 4eac3336..8086e562 100644
--- a/packages/web/server/index.js
+++ b/packages/web/server/index.js
@@ -1487,6 +1487,10 @@ async function main(options = {}) {
   // relay candidate lazily at request time, so a late-bound holder is enough.
   let relayServiceInstance = null;
 
+  // Same pattern for the tunnel runtime: created after the base routes so
+  // /api/system/info resolves port + tunnel URL lazily at request time.
+  let tunnelRuntimeContextHolder = null;
+
   const bootstrapResult = bootstrapRuntime.setupBaseRoutes(app, {
     process,
     openchamberVersion: OPENCHAMBER_VERSION,
@@ -1523,6 +1527,15 @@ async function main(options = {}) {
         apiOnly,
       };
     },
+    // Port this instance serves on and the active tunnel's public URL (if
+    // any), for /api/system/info. Resolved lazily because the tunnel runtime
+    // is created after these base routes are registered.
+    getServerPort: () => {
+      const activePort = tunnelRuntimeContextHolder?.getActivePort?.();
+      if (Number.isFinite(activePort) && activePort > 0) return activePort;
+      return Number.isFinite(port) && port > 0 ? port : null;
+    },
+    getTunnelUrl: () => tunnelRuntimeContextHolder?.tunnelService?.getPublicUrl?.() ?? null,
     verboseRequestLogs: OPENCHAMBER_VERBOSE_REQUEST_LOGS,
     uiPassword,
     tunnelAuthController,
@@ -1598,6 +1611,7 @@ async function main(options = {}) {
 
   const tunnelRuntimeContext = tunnelWiringRuntime.initialize(app, port);
   const { tunnelService, startTunnelWithNormalizedRequest } = tunnelRuntimeContext;
+  tunnelRuntimeContextHolder = tunnelRuntimeContext;
 
   // Private relay host service: config + management routes + host client
   // lifecycle. Loopback port comes from the same source the tunnel uses so
diff --git a/packages/web/server/lib/opencode/bootstrap-runtime.js b/packages/web/server/lib/opencode/bootstrap-runtime.js
index 392c42e8..f3d60a19 100644
--- a/packages/web/server/lib/opencode/bootstrap-runtime.js
+++ b/packages/web/server/lib/opencode/bootstrap-runtime.js
@@ -19,6 +19,8 @@ export const createBootstrapRuntime = (dependencies) => {
       serverStartedAt,
       gracefulShutdown,
       getHealthSnapshot,
+      getServerPort,
+      getTunnelUrl,
       verboseRequestLogs,
       uiPassword,
       tunnelAuthController,
@@ -81,6 +83,8 @@ export const createBootstrapRuntime = (dependencies) => {
       gracefulShutdown,
       getHealthSnapshot,
       getServerId,
+      getServerPort,
+      getTunnelUrl,
       tunnelAuthController,
       uiAuthController,
     });
diff --git a/packages/web/server/lib/opencode/core-routes.js b/packages/web/server/lib/opencode/core-routes.js
index afe5f9e4..87bbb05e 100644
--- a/packages/web/server/lib/opencode/core-routes.js
+++ b/packages/web/server/lib/opencode/core-routes.js
@@ -67,6 +67,12 @@ export const registerServerStatusRoutes = (app, dependencies) => {
     serverStartedAt,
     gracefulShutdown,
     getHealthSnapshot,
+    // Port this OpenChamber instance serves on and the tunnel public URL (if
+    // a tunnel is active). Exposed on /api/system/info so the UI can surface
+    // the active instance's service URLs. Optional: older wiring omits them
+    // and the endpoint reports null.
+    getServerPort = () => null,
+    getTunnelUrl = () => null,
     // Stable server identity (hash of the public signing key — not a secret).
     // Exposed on /health and /api/version so a client can verify that a
     // learned/probed address belongs to the expected server BEFORE sending its
@@ -356,6 +362,8 @@ export const registerServerStatusRoutes = (app, dependencies) => {
       runtime: runtimeName,
       pid: process.pid,
       startedAt: serverStartedAt,
+      port: getServerPort(),
+      tunnelUrl: getTunnelUrl(),
     });
   });
 
diff --git a/packages/web/server/lib/opencode/core-routes.test.js b/packages/web/server/lib/opencode/core-routes.test.js
index 200a1c13..145484cf 100644
--- a/packages/web/server/lib/opencode/core-routes.test.js
+++ b/packages/web/server/lib/opencode/core-routes.test.js
@@ -791,4 +791,46 @@ describe('client auth routes', () => {
       socket: { remoteAddress: '203.0.113.10' },
     })).toBe('unknown-public');
   });
+
+  it('reports null port and tunnel URL on /api/system/info when no getters are wired', async () => {
+    const app = express();
+    registerServerStatusRoutes(app, {
+      process,
+      serverStartedAt: '2026-01-01T00:00:00.000Z',
+      gracefulShutdown: vi.fn(async () => {}),
+      getHealthSnapshot: () => ({ status: 'ok' }),
+      openchamberVersion: '1.0.0',
+      runtimeName: 'test',
+      express,
+    });
+
+    const response = await request(app).get('/api/system/info');
+    expect(response.status).toBe(200);
+    expect(response.body.openchamberVersion).toBe('1.0.0');
+    expect(response.body.runtime).toBe('test');
+    expect(response.body.pid).toBeTypeOf('number');
+    expect(response.body.startedAt).toBeTypeOf('string');
+    expect(response.body.port).toBeNull();
+    expect(response.body.tunnelUrl).toBeNull();
+  });
+
+  it('reports the instance port and tunnel URL on /api/system/info from the wired getters', async () => {
+    const app = express();
+    registerServerStatusRoutes(app, {
+      process,
+      serverStartedAt: '2026-01-01T00:00:00.000Z',
+      gracefulShutdown: vi.fn(async () => {}),
+      getHealthSnapshot: () => ({ status: 'ok' }),
+      openchamberVersion: '1.0.0',
+      runtimeName: 'test',
+      express,
+      getServerPort: () => 9988,
+      getTunnelUrl: () => 'https://worktree-a.example.trycloudflare.com',
+    });
+
+    const response = await request(app).get('/api/system/info');
+    expect(response.status).toBe(200);
+    expect(response.body.port).toBe(9988);
+    expect(response.body.tunnelUrl).toBe('https://worktree-a.example.trycloudflare.com');
+  });
 });