diff --git a/README.md b/README.md
index 30f9cff..4430306 100644
--- a/README.md
+++ b/README.md
@@ -146,9 +146,10 @@ Frontend environment setup:
 - Preferred variable: BACKEND_URL
 - Existing deployments may continue using NEXT_PUBLIC_BACKEND_URL as a fallback
 - Local development value: http://localhost:8000
-The browser calls the frontend's same-origin `/api/backend` proxy. The proxy
+The browser calls the frontend's same-origin `/api/calorieapp` proxy. The proxy
 forwards only supported CalorieApp endpoints to the configured backend and
-keeps CalorieApp cookies first-party to the frontend origin.
+keeps CalorieApp cookies first-party to the frontend origin. The legacy
+`/api/backend` alias remains available for backward compatibility.
 
 Production Xaman sign-in is owned by the WordPress page rendered through the
 `[calorieapp_embed]` shortcode. WordPress creates a SignIn payload without a
diff --git a/backend/tests/test_frontend_configuration.py b/backend/tests/test_frontend_configuration.py
index f96bdff..cfe2421 100644
--- a/backend/tests/test_frontend_configuration.py
+++ b/backend/tests/test_frontend_configuration.py
@@ -44,7 +44,7 @@ def test_account_export_ui_is_versioned_private_and_proxy_allowlisted():
         ).read_text(encoding="utf-8")
     )["locales"]["en"]["export"]
 
-    assert '"/api/backend"' in export_source
+    assert '"/api/calorieapp"' in export_source
     assert "${BACKEND_BASE_URL}/api/identity/export" in export_source
     assert '"calorieapp-account-data-v2"' in export_source
     assert '"calorieapp-account-data-v2.json"' in export_source
diff --git a/frontend/app/api/calorieapp/[...path]/route.ts b/frontend/app/api/calorieapp/[...path]/route.ts
new file mode 100644
index 0000000..d3d0580
--- /dev/null
+++ b/frontend/app/api/calorieapp/[...path]/route.ts
@@ -0,0 +1,8 @@
+// Keep the legacy `/api/backend` route available for existing clients while
+// exposing a brand-specific path that browser privacy filters do not block.
+export {
+  dynamic,
+  GET,
+  POST,
+  DELETE,
+} from "../../backend/[...path]/route";
diff --git a/frontend/app/auth/callback/page.tsx b/frontend/app/auth/callback/page.tsx
index 111c1ab..0deb8b2 100644
--- a/frontend/app/auth/callback/page.tsx
+++ b/frontend/app/auth/callback/page.tsx
@@ -9,7 +9,7 @@ import {
 } from "@/lib/backendRequest";
 import { safeWordPressReturn } from "@/lib/wordpressReturn";
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 
 type CallbackResponse = {
   redirect_to: string;
diff --git a/frontend/components/AccountDataExportButton.tsx b/frontend/components/AccountDataExportButton.tsx
index 6e7fde1..a88b3a3 100644
--- a/frontend/components/AccountDataExportButton.tsx
+++ b/frontend/components/AccountDataExportButton.tsx
@@ -13,7 +13,7 @@ import {
 } from "@/lib/privateExportRequest";
 import { getAccountPrivacyCopy } from "@/lib/accountPrivacyCopy";
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 const ACCOUNT_EXPORT_VERSION = "calorieapp-account-data-v2";
 const ACCOUNT_EXPORT_FILENAME = "calorieapp-account-data-v2.json";
 const PRIVATE_EXPORT_URL_REVOCATION_DELAY_MS = 1_000;
diff --git a/frontend/components/AccountDataImportPanel.tsx b/frontend/components/AccountDataImportPanel.tsx
index b01bec7..5ff10a3 100644
--- a/frontend/components/AccountDataImportPanel.tsx
+++ b/frontend/components/AccountDataImportPanel.tsx
@@ -18,7 +18,7 @@ import {
 } from "@/lib/accountImportRequest";
 import { getAccountPrivacyCopy } from "@/lib/accountPrivacyCopy";
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 export const ACCOUNT_IMPORT_MAX_BYTES = 5 * 1024 * 1024;
 export const ACCOUNT_IMPORT_MAX_USER_ID_BYTES = 255;
 
diff --git a/frontend/components/AccountErasurePanel.tsx b/frontend/components/AccountErasurePanel.tsx
index 95f2dd1..cda5876 100644
--- a/frontend/components/AccountErasurePanel.tsx
+++ b/frontend/components/AccountErasurePanel.tsx
@@ -13,7 +13,7 @@ import {
 } from "@/lib/accountErasureRequest";
 import { getAccountPrivacyCopy } from "@/lib/accountPrivacyCopy";
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 const ACCOUNT_ERASURE_ACKNOWLEDGEMENT = "delete-my-calorieapp-account";
 
 type AccountErasurePanelProps = {
diff --git a/frontend/components/FoodSearchPlaceholder.tsx b/frontend/components/FoodSearchPlaceholder.tsx
index f0df401..d924b39 100644
--- a/frontend/components/FoodSearchPlaceholder.tsx
+++ b/frontend/components/FoodSearchPlaceholder.tsx
@@ -20,7 +20,7 @@ import {
   waitForBackendReady,
 } from "@/lib/backendRequest";
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 type PortionOption = "whole" | "half" | "quarter" | "custom";
 const SIGN_IN_REQUIRED_LOG_MESSAGE =
   "Your session has expired or you are not signed in. Please sign in again to manage food logs.";
diff --git a/frontend/components/XamanLoginPanel.tsx b/frontend/components/XamanLoginPanel.tsx
index 42f62b1..a100210 100644
--- a/frontend/components/XamanLoginPanel.tsx
+++ b/frontend/components/XamanLoginPanel.tsx
@@ -47,7 +47,7 @@ type PendingLogin = {
   locale: string;
 };
 
-const BACKEND_BASE_URL = "/api/backend";
+const BACKEND_BASE_URL = "/api/calorieapp";
 const ACCOUNT_ERASURE_UI_ENABLED =
   process.env.NEXT_PUBLIC_ACCOUNT_ERASURE_UI_ENABLED === "true";
 const ACCOUNT_DATA_IMPORT_UI_ENABLED =
diff --git a/frontend/lib/backendRequest.ts b/frontend/lib/backendRequest.ts
index 1fa4efc..709fb49 100644
--- a/frontend/lib/backendRequest.ts
+++ b/frontend/lib/backendRequest.ts
@@ -4,9 +4,11 @@ export const DEFAULT_BACKEND_WARMUP_TIMEOUT_MS = 180_000;
 // Render may not wake one free service from another free service's proxy
 // request. In production this public URL is raced with the browser-safe
 // same-origin health route; all application requests continue to use the
-// same-origin proxy.
+// same-origin proxy. Keep the public browser path brand-specific: privacy
+// filters can block generic `/api/backend/*` request paths before they leave
+// the browser.
 export const BACKEND_WAKE_BASE_URL =
-  process.env.NEXT_PUBLIC_BACKEND_WAKE_URL?.trim() || "/api/backend";
+  process.env.NEXT_PUBLIC_BACKEND_WAKE_URL?.trim() || "/api/calorieapp";
 
 const BACKEND_WARMUP_ATTEMPT_TIMEOUT_MS = 70_000;
 const BACKEND_WARMUP_INITIAL_RETRY_DELAY_MS = 5_000;
@@ -196,7 +198,7 @@ export async function waitForBackendReady(
   signal?: AbortSignal,
   timeoutMs = DEFAULT_BACKEND_WARMUP_TIMEOUT_MS
 ) {
-  const sameOriginBaseUrl = "/api/backend";
+  const sameOriginBaseUrl = "/api/calorieapp";
   const normalizedBaseUrl = backendBaseUrl.replace(/\/$/, "");
 
   if (normalizedBaseUrl === sameOriginBaseUrl) {
diff --git a/release-check.sh b/release-check.sh
index bce9457..74410ef 100644
--- a/release-check.sh
+++ b/release-check.sh
@@ -73,6 +73,7 @@ node --test \
     "$repo_root/tools/tests/account_data_export_validation.test.mjs" \
     "$repo_root/tools/tests/account_erasure_ui.test.mjs" \
     "$repo_root/tools/tests/account_privacy_locales.test.mjs" \
+    "$repo_root/tools/tests/backend_request_route.test.mjs" \
     "$repo_root/tools/tests/calorieapp_embed_readiness.test.mjs" \
     "$repo_root/tools/tests/identity_locales.test.mjs" \
     "$repo_root/tools/tests/xaman_logout_request.test.mjs" \
diff --git a/tools/tests/backend_request_route.test.mjs b/tools/tests/backend_request_route.test.mjs
new file mode 100644
index 0000000..518b80c
--- /dev/null
+++ b/tools/tests/backend_request_route.test.mjs
@@ -0,0 +1,77 @@
+import assert from "node:assert/strict";
+import { createRequire } from "node:module";
+import { readFile } from "node:fs/promises";
+import test from "node:test";
+import vm from "node:vm";
+
+const REQUEST_HELPER_PATH = new URL(
+  "../../frontend/lib/backendRequest.ts",
+  import.meta.url
+);
+const requireFromFrontend = createRequire(
+  new URL("../../frontend/package.json", import.meta.url)
+);
+
+async function loadBackendRequest(fetch) {
+  const typescript = requireFromFrontend("typescript");
+  const source = await readFile(REQUEST_HELPER_PATH, "utf8");
+  const compiled = typescript.transpileModule(source, {
+    compilerOptions: {
+      module: typescript.ModuleKind.CommonJS,
+      target: typescript.ScriptTarget.ES2022,
+    },
+  }).outputText;
+  const module = { exports: {} };
+  const context = vm.createContext({
+    AbortController,
+    Date,
+    Error,
+    Math,
+    Number,
+    Promise,
+    URL,
+    clearTimeout,
+    console,
+    fetch,
+    module,
+    exports: module.exports,
+    process: {
+      env: { NEXT_PUBLIC_BACKEND_WAKE_URL: "https://backend.example" },
+    },
+    setTimeout,
+  });
+
+  vm.runInContext(compiled, context);
+  return module.exports;
+}
+
+test("readiness races the public origin with the filter-safe same-origin route", async () => {
+  const calls = [];
+  const backendRequest = await loadBackendRequest(async (url) => {
+    calls.push(url);
+    if (url !== "/api/calorieapp/health") {
+      throw new Error("synthetic blocked cross-origin request");
+    }
+
+    return {
+      ok: true,
+      headers: { get: () => "application/json" },
+      json: async () => ({ status: "ok" }),
+    };
+  });
+
+  await backendRequest.waitForBackendReady(
+    backendRequest.BACKEND_WAKE_BASE_URL,
+    undefined,
+    1_000
+  );
+
+  assert.equal(calls.length, 2);
+  assert.deepEqual(
+    new Set(calls),
+    new Set([
+      "https://backend.example/health",
+      "/api/calorieapp/health",
+    ])
+  );
+});
diff --git a/tools/tests/xaman_login_start_retry.test.mjs b/tools/tests/xaman_login_start_retry.test.mjs
index 7a7bf54..77b0cda 100644
--- a/tools/tests/xaman_login_start_retry.test.mjs
+++ b/tools/tests/xaman_login_start_retry.test.mjs
@@ -143,8 +143,8 @@ test("logout retries the cookie-clearing endpoint after an interrupted response"
   await module.exports.requestCalorieAppLogout();
 
   assert.deepEqual(requests, [
-    { url: "/api/backend/api/identity/logout", timeoutMs: 75000 },
-    { url: "/api/backend/api/identity/logout", timeoutMs: 15000 },
+    { url: "/api/calorieapp/api/identity/logout", timeoutMs: 75000 },
+    { url: "/api/calorieapp/api/identity/logout", timeoutMs: 15000 },
   ]);
 });
 
@@ -807,8 +807,8 @@ test("embedded completion recovers safely without replaying one-time codes", asy
 
   assert.equal(directUser.user_id, "calorieapp-user");
   assert.deepEqual(requests, [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
   assert.deepEqual(scheduledDelays, []);
   assert.equal(cancelledResponseBodies, 0);
@@ -825,9 +825,9 @@ test("embedded completion recovers safely without replaying one-time codes", asy
   );
   assert.equal(transientCookieUser.user_id, "calorieapp-user");
   assert.deepEqual(requests.slice(transientCookieStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
   assert.deepEqual(scheduledDelays, [5000]);
 
@@ -868,10 +868,10 @@ test("embedded completion recovers safely without replaying one-time codes", asy
   );
   assert.equal(fallbackUser.user_id, "calorieapp-user");
   assert.deepEqual(requests.slice(fallbackStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
 
   scenario = "rate-limited";
@@ -893,8 +893,8 @@ test("embedded completion recovers safely without replaying one-time codes", asy
     }
   );
   assert.deepEqual(requests.slice(rateLimitStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
   ]);
 
   scenario = "ambiguous-completed";
@@ -909,9 +909,9 @@ test("embedded completion recovers safely without replaying one-time codes", asy
   );
   assert.equal(recoveredUser.user_id, "calorieapp-user");
   assert.deepEqual(requests.slice(ambiguousStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
 
   scenario = "ambiguous-session-unavailable";
@@ -932,9 +932,9 @@ test("embedded completion recovers safely without replaying one-time codes", asy
     }
   );
   assert.deepEqual(requests.slice(unavailableSessionStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
 
   scenario = "malformed-success";
@@ -949,9 +949,9 @@ test("embedded completion recovers safely without replaying one-time codes", asy
   );
   assert.equal(malformedRecoveryUser.user_id, "calorieapp-user");
   assert.deepEqual(requests.slice(malformedStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
 
   scenario = "consumed-after-success";
@@ -966,9 +966,9 @@ test("embedded completion recovers safely without replaying one-time codes", asy
   );
   assert.equal(consumedRecoveryUser.user_id, "calorieapp-user");
   assert.deepEqual(requests.slice(consumedStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
-    { url: "/api/backend/api/identity/me", method: "GET" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/me", method: "GET" },
   ]);
 
   scenario = "permanent-callback";
@@ -984,8 +984,8 @@ test("embedded completion recovers safely without replaying one-time codes", asy
     /Callback failed with 400/
   );
   assert.deepEqual(requests.slice(permanentStart), [
-    { url: "/api/backend/api/identity/callback", method: "POST" },
-    { url: "/api/backend/api/identity/login/status", method: "POST" },
+    { url: "/api/calorieapp/api/identity/callback", method: "POST" },
+    { url: "/api/calorieapp/api/identity/login/status", method: "POST" },
   ]);
 
   scenario = "permanent-me";
diff --git a/tools/tests/xaman_logout_request.test.mjs b/tools/tests/xaman_logout_request.test.mjs
index 57baf39..916203e 100644
--- a/tools/tests/xaman_logout_request.test.mjs
+++ b/tools/tests/xaman_logout_request.test.mjs
@@ -83,7 +83,7 @@ test("joint logout uses the same-origin proxy without a readiness wait", async (
   await login.requestCalorieAppLogout();
 
   assert.deepEqual(events, [
-    "request:/api/backend/api/identity/logout:75000",
+    "request:/api/calorieapp/api/identity/logout:75000",
   ]);
 });
 
@@ -104,7 +104,7 @@ test("joint logout accepts an absent app session and rejects an HTTP failure", a
   await assert.rejects(login.requestCalorieAppLogout(), /Unable to log out/);
 
   assert.equal(calls.length, 3);
-  assert.equal(calls[0].url, "/api/backend/api/identity/logout");
+  assert.equal(calls[0].url, "/api/calorieapp/api/identity/logout");
   assert.equal(calls[0].options.method, "POST");
   assert.deepEqual(calls.map(({ timeoutMs }) => timeoutMs), [75000, 75000, 75000]);
 });
@@ -122,8 +122,8 @@ test("joint logout retries cookie clearing after a transport interruption", asyn
   await login.requestCalorieAppLogout();
 
   assert.deepEqual(calls.map(({ url }) => url), [
-    "/api/backend/api/identity/logout",
-    "/api/backend/api/identity/logout",
+    "/api/calorieapp/api/identity/logout",
+    "/api/calorieapp/api/identity/logout",
   ]);
   assert.deepEqual(calls.map(({ timeoutMs }) => timeoutMs), [75000, 15000]);
 });