diff --git a/scripts/homolog/lib/adminClient.mjs b/scripts/homolog/lib/adminClient.mjs
new file mode 100644
index 0000000000..343c483e11
--- /dev/null
+++ b/scripts/homolog/lib/adminClient.mjs
@@ -0,0 +1,49 @@
+// Cookie confirmado em src/app/api/auth/login/route.ts (cookieStore.set("auth_token", ...))
+// e em src/shared/utils/apiAuth.ts (isDashboardSessionAuthenticated lê "auth_token").
+const TOKEN_COOKIE = "auth_token";
+
+export function extractJwtCookie(setCookies) {
+  for (const c of setCookies || []) {
+    const m = c.match(new RegExp(`^(${TOKEN_COOKIE}=[^;]+)`));
+    if (m) return m[1];
+  }
+  return null;
+}
+
+export function extractApiKey(body) {
+  if (!body?.key || !body?.id) throw new Error("POST /api/keys sem key/id no corpo");
+  return { key: body.key, id: body.id };
+}
+
+/** Login admin → cria API key efêmera. Retorna {key, id, cookie, revoke()}. */
+export async function createEphemeralKey(baseUrl, password) {
+  const login = await fetch(`${baseUrl}/api/auth/login`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ password }),
+  });
+  if (!login.ok) throw new Error(`login falhou: HTTP ${login.status}`);
+  const cookie = extractJwtCookie(login.headers.getSetCookie());
+  if (!cookie) throw new Error("login sem cookie de sessão");
+
+  const create = await fetch(`${baseUrl}/api/keys`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json", cookie },
+    body: JSON.stringify({ name: `homolog-${new Date().toISOString().slice(0, 10)}` }),
+  });
+  if (!create.ok) throw new Error(`criação de key falhou: HTTP ${create.status}`);
+  const { key, id } = extractApiKey(await create.json());
+
+  return {
+    key,
+    id,
+    cookie,
+    async revoke() {
+      const del = await fetch(`${baseUrl}/api/keys/${id}`, {
+        method: "DELETE",
+        headers: { cookie },
+      });
+      if (!del.ok) throw new Error(`revogação da key ${id} falhou: HTTP ${del.status}`);
+    },
+  };
+}
diff --git a/tests/unit/homolog-admin-client.test.ts b/tests/unit/homolog-admin-client.test.ts
new file mode 100644
index 0000000000..225f66073c
--- /dev/null
+++ b/tests/unit/homolog-admin-client.test.ts
@@ -0,0 +1,17 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { extractJwtCookie, extractApiKey } from "../../scripts/homolog/lib/adminClient.mjs";
+
+test("extrai o cookie JWT do set-cookie do login", () => {
+  const jwt = extractJwtCookie(["auth_token=abc.def.ghi; Path=/; HttpOnly; SameSite=Lax"]);
+  assert.equal(jwt, "auth_token=abc.def.ghi");
+});
+
+test("retorna null sem set-cookie de token", () => {
+  assert.equal(extractJwtCookie(["other=1; Path=/"]), null);
+});
+
+test("extrai key e id do POST /api/keys", () => {
+  const r = extractApiKey({ key: "or-abc123", id: "k1", name: "homolog-run" });
+  assert.deepEqual(r, { key: "or-abc123", id: "k1" });
+});