diff --git a/.github/pr-assets/admin-token-remember.png b/.github/pr-assets/admin-token-remember.png
new file mode 100644
index 0000000000..e3ccbf0509
Binary files /dev/null and b/.github/pr-assets/admin-token-remember.png differ
diff --git a/gui/src/admin-token-dialog.ts b/gui/src/admin-token-dialog.ts
index cb383fe7d6..6295e9793e 100644
--- a/gui/src/admin-token-dialog.ts
+++ b/gui/src/admin-token-dialog.ts
@@ -7,10 +7,27 @@ const ADMIN_TOKEN_DOCS_URL = "https://opencodex.me/guides/web-dashboard/#finding
 export type AdminTokenValidation = "accepted" | "rejected" | "unavailable";
 export type AdminTokenVerifier = (token: string) => Promise<AdminTokenValidation>;
 
+const REMEMBERED_ADMIN_TOKEN_KEY = "opencodex.remembered-admin-token";
+
+/**
+ * Opt-in plaintext persistence in localStorage: this is what makes sign-in
+ * work in iOS standalone home-screen web apps, where Safari never offers
+ * password AutoFill or save. Readable by any script on this origin; the
+ * dashboard bundles no third-party scripts.
+ */
+export function getRememberedAdminToken(): string | null {
+  try { return localStorage.getItem(REMEMBERED_ADMIN_TOKEN_KEY); } catch { return null; }
+}
+
+export function clearRememberedAdminToken(): void {
+  try { localStorage.removeItem(REMEMBERED_ADMIN_TOKEN_KEY); } catch { /* storage may be disabled */ }
+}
+
 /**
  * Ask for the management credential with a real sign-in form so browsers and
- * password managers can offer save/autofill. OpenCodex itself still keeps the
- * submitted token in memory only; persistence remains entirely browser-owned.
+ * password managers can offer save/autofill. OpenCodex keeps the submitted
+ * token in memory only unless the user explicitly opts in to remembering it
+ * on this device (see the remember checkbox below).
  */
 export function promptForAdminToken(
   verifyToken: AdminTokenVerifier,
@@ -91,6 +108,16 @@ export function promptForAdminToken(
     help.append(" ", docsLink);
     tokenField.append(help);
 
+    const rememberField = document.createElement("label");
+    rememberField.className = "field-label";
+    rememberField.style.cssText = "display:flex;gap:8px;align-items:center;margin-top:var(--space-4);";
+    const remember = document.createElement("input");
+    remember.id = `${ADMIN_TOKEN_DIALOG_ID}-remember`;
+    remember.name = "remember";
+    remember.type = "checkbox";
+    if (getRememberedAdminToken()) remember.checked = true;
+    rememberField.append(remember, document.createTextNode(messages["auth.adminTokenRemember"]));
+
     const validationError = document.createElement("div");
     validationError.className = "notice notice-err";
     validationError.setAttribute("role", "alert");
@@ -108,7 +135,7 @@ export function promptForAdminToken(
     submit.textContent = messages["common.ok"];
     actions.append(cancel, submit);
 
-    form.append(heading, accountField, tokenField, validationError, actions);
+    form.append(heading, accountField, tokenField, rememberField, validationError, actions);
     dialog.append(form);
 
     /*
@@ -147,6 +174,11 @@ export function promptForAdminToken(
       void verifyToken(token).then((result) => {
         if (settled) return;
         if (result === "accepted") {
+          if (remember.checked) {
+            try { localStorage.setItem(REMEMBERED_ADMIN_TOKEN_KEY, token); } catch { /* storage may be disabled */ }
+          } else {
+            clearRememberedAdminToken();
+          }
           finish(token);
           return;
         }
diff --git a/gui/src/api.ts b/gui/src/api.ts
index 1e99ed6f73..a946a47e28 100644
--- a/gui/src/api.ts
+++ b/gui/src/api.ts
@@ -1,4 +1,4 @@
-import { promptForAdminToken, type AdminTokenVerifier } from "./admin-token-dialog";
+import { clearRememberedAdminToken, getRememberedAdminToken, promptForAdminToken, type AdminTokenVerifier } from "./admin-token-dialog";
 import { createBoundedFetch } from "./bounded-fetch";
 import { adminTokenPromptAllowed, standaloneApiTargets, type ApiPlane, type ApiTarget, type ApiTargets } from "./api-targets";
 
@@ -283,6 +283,23 @@ async function resolveTokenAfter401(plane: ApiPlane, failedToken: string | null,
         state.promptCancelled = true;
         return null;
       }
+      const remembered = getRememberedAdminToken();
+      if (remembered) {
+        if (remembered === failedToken) {
+          // The stored token just caused this 401: it is revoked. Clear it
+          // now so it cannot linger until the next visit.
+          clearRememberedAdminToken();
+        } else {
+          const verdict = await verifyAdminToken(plane, remembered);
+          if (verdict === "accepted") {
+            state.session = { token: remembered, csrfToken: null, browserOrigin: null, serverOrigin: state.target.serverOrigin };
+            return remembered;
+          }
+          if (verdict === "rejected") clearRememberedAdminToken();
+          // "unavailable" (network/server error) leaves the stored token
+          // intact: a transient outage must not delete a valid credential.
+        }
+      }
       const prompted = await requestAdminToken(token => verifyAdminToken(plane, token));
       if (prompted) {
         state.session = { token: prompted, csrfToken: null, browserOrigin: null, serverOrigin: state.target.serverOrigin };
diff --git a/gui/src/i18n/de.ts b/gui/src/i18n/de.ts
index dd5ca2633c..9e2bd48005 100644
--- a/gui/src/i18n/de.ts
+++ b/gui/src/i18n/de.ts
@@ -155,6 +155,7 @@ export const de: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex-Admin-Token (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "Konto",
   "auth.adminTokenFieldLabel": "Admin-Token",
+  "auth.adminTokenRemember": "Auf diesem Gerät merken",
   "auth.adminTokenRejected": "Der Admin-Token wurde abgelehnt. Prüfen Sie ihn und versuchen Sie es erneut.",
   "auth.adminTokenUnavailable": "Der Admin-Token konnte nicht überprüft werden. Versuchen Sie es erneut.",
   "auth.adminTokenHelp": "Dies ist der Admin-Token der OpenCodex-Verwaltungs-API, kein Anbieter-API-Schlüssel. Beim ersten Start schreibt der Proxy ihn nach ~/.opencodex/admin-api-token (oder $OPENCODEX_HOME/admin-api-token); OPENCODEX_ADMIN_AUTH_TOKEN hat Vorrang.",
diff --git a/gui/src/i18n/en.ts b/gui/src/i18n/en.ts
index 6723d74b81..6804067825 100644
--- a/gui/src/i18n/en.ts
+++ b/gui/src/i18n/en.ts
@@ -90,6 +90,7 @@ export const en = {
   "auth.adminTokenTitle": "OpenCodex admin token (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "Account",
   "auth.adminTokenFieldLabel": "Admin token",
+  "auth.adminTokenRemember": "Remember on this device",
   "auth.adminTokenRejected": "That admin token was rejected. Check it and try again.",
   "auth.adminTokenUnavailable": "The admin token could not be verified. Try again.",
   "auth.adminTokenHelp": "This is the OpenCodex management admin token, not a provider API key. The proxy writes it to ~/.opencodex/admin-api-token (or $OPENCODEX_HOME/admin-api-token) on first start, and OPENCODEX_ADMIN_AUTH_TOKEN overrides it.",
diff --git a/gui/src/i18n/fr.ts b/gui/src/i18n/fr.ts
index 43d956906f..42e5a49899 100644
--- a/gui/src/i18n/fr.ts
+++ b/gui/src/i18n/fr.ts
@@ -87,6 +87,7 @@ export const fr: Record<TKey, string> = {
   "auth.adminTokenTitle": "Jeton d’administration OpenCodex (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "Compte",
   "auth.adminTokenFieldLabel": "Jeton d’administration",
+  "auth.adminTokenRemember": "Mémoriser sur cet appareil",
   "auth.adminTokenRejected": "Ce jeton d’administration a été refusé. Vérifiez-le et réessayez.",
   "auth.adminTokenUnavailable": "Le jeton d’administration n’a pas pu être vérifié. Réessayez.",
   "auth.adminTokenHelp": "Il s’agit du jeton d’administration de l’API de gestion OpenCodex, pas d’une clé API de fournisseur. Au premier démarrage, le proxy l’écrit dans ~/.opencodex/admin-api-token (ou $OPENCODEX_HOME/admin-api-token), et OPENCODEX_ADMIN_AUTH_TOKEN a la priorité.",
diff --git a/gui/src/i18n/ja.ts b/gui/src/i18n/ja.ts
index d60148bb60..19d231af70 100644
--- a/gui/src/i18n/ja.ts
+++ b/gui/src/i18n/ja.ts
@@ -157,6 +157,7 @@ export const ja: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex 管理者トークン (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "アカウント",
   "auth.adminTokenFieldLabel": "管理者トークン",
+  "auth.adminTokenRemember": "この端末で記憶する",
   "auth.adminTokenRejected": "管理者トークンが拒否されました。確認してもう一度お試しください。",
   "auth.adminTokenUnavailable": "管理者トークンを確認できませんでした。もう一度お試しください。",
   "auth.adminTokenHelp": "これは OpenCodex 管理 API の管理者トークンで、プロバイダーの API キーではありません。プロキシは初回起動時に ~/.opencodex/admin-api-token（または $OPENCODEX_HOME/admin-api-token）へ書き込み、OPENCODEX_ADMIN_AUTH_TOKEN を設定するとそちらが優先されます。",
diff --git a/gui/src/i18n/ko.ts b/gui/src/i18n/ko.ts
index be26daf40e..0457eb5106 100644
--- a/gui/src/i18n/ko.ts
+++ b/gui/src/i18n/ko.ts
@@ -155,6 +155,7 @@ export const ko: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex 관리자 토큰 (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "계정",
   "auth.adminTokenFieldLabel": "관리자 토큰",
+  "auth.adminTokenRemember": "이 기기에서 기억하기",
   "auth.adminTokenRejected": "관리자 토큰이 거부되었습니다. 확인한 후 다시 시도하세요.",
   "auth.adminTokenUnavailable": "관리자 토큰을 확인할 수 없습니다. 다시 시도하세요.",
   "auth.adminTokenHelp": "이 값은 OpenCodex 관리 API의 관리자 토큰이며 공급자 API 키가 아닙니다. 프록시가 처음 실행될 때 ~/.opencodex/admin-api-token(또는 $OPENCODEX_HOME/admin-api-token)에 기록하고, OPENCODEX_ADMIN_AUTH_TOKEN을 설정하면 그 값이 우선합니다.",
diff --git a/gui/src/i18n/ru.ts b/gui/src/i18n/ru.ts
index 9691f8a49f..1e7531e438 100644
--- a/gui/src/i18n/ru.ts
+++ b/gui/src/i18n/ru.ts
@@ -157,6 +157,7 @@ export const ru: Record<TKey, string> = {
   "auth.adminTokenTitle": "Токен администратора OpenCodex (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "Учётная запись",
   "auth.adminTokenFieldLabel": "Токен администратора",
+  "auth.adminTokenRemember": "Запомнить на этом устройстве",
   "auth.adminTokenRejected": "Токен администратора отклонён. Проверьте его и повторите попытку.",
   "auth.adminTokenUnavailable": "Не удалось проверить токен администратора. Повторите попытку.",
   "auth.adminTokenHelp": "Это административный токен управляющего API OpenCodex, а не ключ API провайдера. При первом запуске прокси записывает его в ~/.opencodex/admin-api-token (или $OPENCODEX_HOME/admin-api-token), а OPENCODEX_ADMIN_AUTH_TOKEN переопределяет это значение.",
diff --git a/gui/src/i18n/tr.ts b/gui/src/i18n/tr.ts
index 95336fa32f..2329db90d2 100644
--- a/gui/src/i18n/tr.ts
+++ b/gui/src/i18n/tr.ts
@@ -89,6 +89,7 @@ export const tr: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex yönetici jetonu (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "Hesap",
   "auth.adminTokenFieldLabel": "Yönetici jetonu",
+  "auth.adminTokenRemember": "Bu cihazda hatırla",
   "auth.adminTokenRejected": "Bu yönetici jetonu reddedildi. Kontrol edip tekrar deneyin.",
   "auth.adminTokenUnavailable": "Yönetici jetonu doğrulanamadı. Tekrar deneyin.",
   "auth.adminTokenHelp": "Bu, sağlayıcı API anahtarı değil, OpenCodex yönetim API’sinin yönetici jetonudur. Proxy ilk açılışta bunu ~/.opencodex/admin-api-token (veya $OPENCODEX_HOME/admin-api-token) dosyasına yazar; OPENCODEX_ADMIN_AUTH_TOKEN bu değeri geçersiz kılar.",
diff --git a/gui/src/i18n/zh-TW.ts b/gui/src/i18n/zh-TW.ts
index 19f1e50ce2..59fc8ca7b5 100644
--- a/gui/src/i18n/zh-TW.ts
+++ b/gui/src/i18n/zh-TW.ts
@@ -2155,6 +2155,7 @@ export const zhTW: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex 管理員金鑰 (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "帳號",
   "auth.adminTokenFieldLabel": "管理員金鑰",
+  "auth.adminTokenRemember": "在此裝置上記住",
   "auth.adminTokenRejected": "該管理員金鑰被拒絕。請檢查後再試一次。",
   "auth.adminTokenUnavailable": "無法驗證管理員金鑰。請再試一次。",
   "auth.adminTokenHelp": "這是 OpenCodex 管理 API 的管理員金鑰，不是服務商 API 金鑰。代理首次啟動時會寫入 ~/.opencodex/admin-api-token（或 $OPENCODEX_HOME/admin-api-token），設定 OPENCODEX_ADMIN_AUTH_TOKEN 可覆寫該值。",
diff --git a/gui/src/i18n/zh.ts b/gui/src/i18n/zh.ts
index e081d027f3..ec444be0b0 100644
--- a/gui/src/i18n/zh.ts
+++ b/gui/src/i18n/zh.ts
@@ -155,6 +155,7 @@ export const zh: Record<TKey, string> = {
   "auth.adminTokenTitle": "OpenCodex 管理员令牌 (OPENCODEX_ADMIN_AUTH_TOKEN)",
   "auth.adminAccountLabel": "账户",
   "auth.adminTokenFieldLabel": "管理员令牌",
+  "auth.adminTokenRemember": "在此设备上记住",
   "auth.adminTokenRejected": "管理员令牌被拒绝。请检查后重试。",
   "auth.adminTokenUnavailable": "无法验证管理员令牌。请重试。",
   "auth.adminTokenHelp": "这是 OpenCodex 管理 API 的管理员令牌，不是服务商 API 密钥。代理首次启动时会写入 ~/.opencodex/admin-api-token（或 $OPENCODEX_HOME/admin-api-token），设置 OPENCODEX_ADMIN_AUTH_TOKEN 可覆盖该值。",
diff --git a/gui/tests/admin-token-dialog.test.ts b/gui/tests/admin-token-dialog.test.ts
index 849753833c..b4d6b6dbae 100644
--- a/gui/tests/admin-token-dialog.test.ts
+++ b/gui/tests/admin-token-dialog.test.ts
@@ -109,6 +109,53 @@ test("keeps the dialog open for whitespace and rejected tokens until one is acce
   expect(dialog.isConnected).toBe(false);
 });
 
+test("checked remember box persists the accepted token for standalone sign-in", async () => {
+  const pending = promptForAdminToken(async () => "accepted");
+  const dialog = document.querySelector<HTMLDialogElement>("#opencodex-admin-token-dialog")!;
+  const form = dialog.querySelector<HTMLFormElement>("form")!;
+  const password = form.elements.namedItem("password") as HTMLInputElement;
+  const remember = form.elements.namedItem("opencodex-admin-token-dialog-remember") as HTMLInputElement;
+
+  expect(remember.type).toBe("checkbox");
+  password.value = "stored-token";
+  remember.checked = true;
+  form.dispatchEvent(new testWindow.Event("submit", { bubbles: true, cancelable: true }));
+
+  expect(await pending).toBe("stored-token");
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBe("stored-token");
+});
+
+test("unchecked remember box clears any stale remembered token", async () => {
+  localStorage.setItem("opencodex.remembered-admin-token", "stale-token");
+
+  const pending = promptForAdminToken(async () => "accepted");
+  const dialog = document.querySelector<HTMLDialogElement>("#opencodex-admin-token-dialog")!;
+  const form = dialog.querySelector<HTMLFormElement>("form")!;
+  const password = form.elements.namedItem("password") as HTMLInputElement;
+  const remember = form.elements.namedItem("remember") as HTMLInputElement;
+
+  expect(remember.checked).toBe(true); // pre-checked because a stored value exists
+  remember.checked = false;
+  password.value = "fresh-token";
+  form.dispatchEvent(new testWindow.Event("submit", { bubbles: true, cancelable: true }));
+
+  expect(await pending).toBe("fresh-token");
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBeNull();
+});
+
+test("remember checkbox has a form control name for consistency", async () => {
+  const pending = promptForAdminToken(async () => "accepted");
+  const dialog = document.querySelector<HTMLDialogElement>("#opencodex-admin-token-dialog")!;
+  const form = dialog.querySelector<HTMLFormElement>("form")!;
+  const remember = form.elements.namedItem("remember") as HTMLInputElement;
+  const password = form.elements.namedItem("password") as HTMLInputElement;
+
+  expect(remember.name).toBe("remember");
+  password.value = "x";
+  form.dispatchEvent(new testWindow.Event("submit", { bubbles: true, cancelable: true }));
+  await pending;
+});
+
 test("uses the active UI locale instead of re-detecting browser storage", async () => {
   localStorage.setItem("ocx-lang", "en");
   setActiveLocale("ko");
diff --git a/gui/tests/api-auth-memory.test.ts b/gui/tests/api-auth-memory.test.ts
index 96c618f6bd..3b1ff32676 100644
--- a/gui/tests/api-auth-memory.test.ts
+++ b/gui/tests/api-auth-memory.test.ts
@@ -4,7 +4,7 @@ import { configureApiTargets, fetchAudioUpload, installApiAuthFetch, installApiS
 import { targetsFromMachineStatus, type MachineStatusV1 } from "../src/api-targets";
 
 const LEGACY_TOKEN_KEY = "opencodex-api-token";
-const globals = ["document", "window", "navigator", "sessionStorage", "fetch"] as const;
+const globals = ["document", "window", "navigator", "sessionStorage", "localStorage", "fetch"] as const;
 let previousGlobals: Record<(typeof globals)[number], unknown>;
 let testWindow: Window;
 let originalPrompt: typeof window.prompt;
@@ -17,6 +17,7 @@ beforeEach(() => {
     window: { configurable: true, value: testWindow },
     navigator: { configurable: true, value: testWindow.navigator },
     sessionStorage: { configurable: true, value: testWindow.sessionStorage },
+    localStorage: { configurable: true, value: testWindow.localStorage },
     fetch: { configurable: true, value: testWindow.fetch.bind(testWindow) },
   });
   originalPrompt = window.prompt;
@@ -133,6 +134,88 @@ test("prompted API tokens stay memory-only and are not written to sessionStorage
   expect(sessionStorage.length).toBe(0);
 });
 
+test("remembered token is verified and used silently without prompting", async () => {
+  declareManagementAuthRequired();
+  localStorage.setItem("opencodex.remembered-admin-token", "remembered-token");
+  let promptCalls = 0;
+  window.prompt = () => { promptCalls += 1; return "prompt-token"; };
+
+  const seenTokens: Array<string | null> = [];
+  const mockFetch = (async (_input: RequestInfo | URL, init?: RequestInit) => {
+    const key = new Headers(init?.headers).get("X-OpenCodex-API-Key");
+    seenTokens.push(key);
+    if (key === "remembered-token") return new Response("{}", { status: 200 });
+    return new Response("unauthorized", { status: 401 });
+  }) as typeof fetch;
+  await installMockAuthFetch(mockFetch);
+
+  const res = await fetch("/api/config");
+  expect(res.status).toBe(200);
+  expect(promptCalls).toBe(0);
+  expect(seenTokens).toContain("remembered-token");
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBe("remembered-token");
+});
+
+test("rejected remembered token is cleared and the prompt takes over", async () => {
+  declareManagementAuthRequired();
+  localStorage.setItem("opencodex.remembered-admin-token", "stale-token");
+  let promptCalls = 0;
+  window.prompt = () => { promptCalls += 1; return "fresh-token"; };
+
+  const mockFetch = (async (_input: RequestInfo | URL, init?: RequestInit) => {
+    const key = new Headers(init?.headers).get("X-OpenCodex-API-Key");
+    if (key === "fresh-token") return new Response("{}", { status: 200 });
+    return new Response("unauthorized", { status: 401 });
+  }) as typeof fetch;
+  await installMockAuthFetch(mockFetch);
+
+  const res = await fetch("/api/config");
+  expect(res.status).toBe(200);
+  expect(promptCalls).toBe(1);
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBeNull();
+});
+
+test("unavailable remembered token survives a transient server error", async () => {
+  declareManagementAuthRequired();
+  localStorage.setItem("opencodex.remembered-admin-token", "good-token");
+  let promptCalls = 0;
+  window.prompt = () => { promptCalls += 1; return null; };
+
+  // Validation endpoint returns 503 (unavailable), not 401 (rejected).
+  const mockFetch = (async (_input: RequestInfo | URL, init?: RequestInit) => {
+    const key = new Headers(init?.headers).get("X-OpenCodex-API-Key");
+    const url = new URL(_input instanceof Request ? _input.url : String(_input), "http://localhost/");
+    if (url.pathname === "/api/settings" && key === "good-token") {
+      return new Response("overloaded", { status: 503 });
+    }
+    return new Response("unauthorized", { status: 401 });
+  }) as typeof fetch;
+  await installMockAuthFetch(mockFetch);
+
+  await fetch("/api/config");
+  expect(promptCalls).toBe(1); // fell through to prompt
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBe("good-token"); // NOT cleared
+});
+
+test("remembered token that caused the current 401 is cleared immediately", async () => {
+  declareManagementAuthRequired();
+  localStorage.setItem("opencodex.remembered-admin-token", "revoked-token");
+  let promptCalls = 0;
+  window.prompt = () => { promptCalls += 1; return "fresh-token"; };
+
+  const mockFetch = (async (_input: RequestInfo | URL, init?: RequestInit) => {
+    const key = new Headers(init?.headers).get("X-OpenCodex-API-Key");
+    if (key === "fresh-token") return new Response("{}", { status: 200 });
+    return new Response("unauthorized", { status: 401 });
+  }) as typeof fetch;
+  await installMockAuthFetch(mockFetch);
+
+  const res = await fetch("/api/config");
+  expect(res.status).toBe(200);
+  expect(promptCalls).toBe(1);
+  expect(localStorage.getItem("opencodex.remembered-admin-token")).toBeNull();
+});
+
 test("validates prompted tokens with a safe read before retrying the failed request", async () => {
   declareManagementAuthRequired();
   const validationResults: string[] = [];