Facebook Pages (Graph API)

Lightweight, dependency-free, in-memory fake of the Facebook Graph API for Pages. For testing code that publishes posts to a Page feed and reads Page metadata.

Default port: 4801

Quick start

import { FacebookPagesServer } from "./services/facebook-pages/src/server.js";

const server = new FacebookPagesServer(4801);
await server.start();
// ... run your app/tests ...
await server.stop();

Point your Graph client (or raw fetch) at http://127.0.0.1:4801. The access token may be passed as a ?access_token= query parameter or as Authorization: Bearer <token>:

const res = await fetch("http://127.0.0.1:4801/v18.0/2000000000000002/feed", {
  method: "POST",
  headers: { Authorization: "Bearer parlel-test-token", "Content-Type": "application/json" },
  body: JSON.stringify({ message: "Hello world from parlel" }),
});
const { id } = await res.json(); // <pageId>_<postId>

Implemented operations

Routes are versioned (/v18.0/...). Auth via ?access_token= query OR Authorization: Bearer <token> (any non-empty token accepted). State is in-memory and ephemeral.

• GET /v18.0/me — the user behind the token ({ id, name }).
• GET /v18.0/me/accounts — Pages the user manages ({ data: [{ id, name, access_token, ... }], paging }).
• GET /v18.0/:pageId — Page metadata ({ id, name, category }).
• POST /v18.0/:pageId/feed — publish a post. Returns { id }. Requires message or link.
• GET /v18.0/:pageId/posts — list published posts ({ data: [...], paging }).

Service & inspection operations (parlel extensions)

• GET / — service metadata.
• GET /health — health check.
• POST /__parlel/reset — reset all in-memory state.
• GET /__parlel/posts — list captured posts.

Access via MCP / preview URL

When run inside a Daytona sandbox, this HTTP service is auto-exposed at the sandbox's preview URL. Send requests to the preview URL with the x-daytona-preview-token header to reach the service from outside the sandbox. The MCP layer surfaces the same endpoints described above.

Surface coverage

This emulator faithfully replicates the API surface most application code and agents exercise. Anything below the supported lines is either an intentional design choice for a fast, zero-cost local emulator (✓ By design) or a candidate for a future release (⟳ Roadmap) — never a silent inaccuracy.

Legend: ✅ fully supported · ◐ accepted (stored, not strictly enforced) · ✓ by design · ⟳ on the roadmap.

Configuration — test.env

Copy these into your test.env (used by the bridge sidecar flow). Tokens are Parlel's seeded test credentials — any non-empty value is accepted by the emulator, so you rarely need to change them. Swap in real credentials only when pointing at the live service in prod.env.

FACEBOOK_PAGES_ACCESS_TOKEN=parlel
FACEBOOK_PAGES_BASE_URL=http://parlel-bridge:4801