diff --git a/pwa-e2e.mjs b/pwa-e2e.mjs
index b087d94..550896c 100644
--- a/pwa-e2e.mjs
+++ b/pwa-e2e.mjs
@@ -37,6 +37,49 @@ async function waitForServiceWorker(page) {
   });
 }
 
+async function assertServiceWorkerApiBypass(page, context) {
+  await page.reload({ waitUntil: "networkidle" });
+  await waitForServiceWorker(page);
+  await page.waitForFunction(() => navigator.serviceWorker.controller !== null, undefined, { timeout: UI_TIMEOUT_MS });
+
+  const apiRequests = async () => page.evaluate(async (timeoutMs) => {
+    async function request(pathname, init) {
+      const controller = new AbortController();
+      const timeout = setTimeout(() => controller.abort(), timeoutMs);
+      try {
+        const response = await fetch(pathname, { ...init, signal: controller.signal });
+        return { status: response.status, body: await response.text() };
+      } catch (error) {
+        return { networkError: true, errorName: error instanceof Error ? error.name : String(error) };
+      } finally {
+        clearTimeout(timeout);
+      }
+    }
+
+    return {
+      get: await request("/api/health"),
+      post: await request("/api/auth/login", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ email: "invalid@agendamax.invalid", password: "invalid" }),
+      }),
+    };
+  }, NETWORK_TIMEOUT_MS);
+
+  const online = await apiRequests();
+  assert.equal(online.get.status, 200, "Online API GET should reach /api/health");
+  assert.equal(online.post.status, 401, "Online API POST should reach invalid login");
+
+  await context.setOffline(true);
+  try {
+    const offline = await apiRequests();
+    assert.equal(offline.get.networkError, true, "Offline API GET returned a response instead of failing");
+    assert.equal(offline.post.networkError, true, "Offline API POST returned a response instead of failing");
+  } finally {
+    await context.setOffline(false);
+  }
+}
+
 async function assertInstallAction(page, expectedVisible, surface = "page") {
   const action = page.getByRole("button", { name: "Instalar AgendaMax" });
   if (expectedVisible) {
@@ -151,6 +194,8 @@ async function main() {
     assert.equal(apiResult.body.ok, true);
     assert.ok(apiRequests.length > 0, "Browser did not reach the real /api/health endpoint");
 
+    await assertServiceWorkerApiBypass(chromiumPage, chromiumContext);
+
     const businessPage = await chromiumContext.newPage();
     await businessPage.setViewportSize({ width: 375, height: 720 });
     await businessPage.goto(baseUrl, { waitUntil: "networkidle" });