X / Twitter

Lightweight, dependency-free, in-memory fake of the X (Twitter) API v2 for testing code that posts tweets, looks up users, and likes tweets.

Default port: 4800

Quick start

import { XTwitterServer } from "./services/x-twitter/src/server.js";

const server = new XTwitterServer(4800);
await server.start();
// ... run your app/tests ...
await server.stop();

Point your X client (or raw fetch) at http://127.0.0.1:4800:

const res = await fetch("http://127.0.0.1:4800/2/tweets", {
  method: "POST",
  headers: { Authorization: "Bearer parlel-test-token", "Content-Type": "application/json" },
  body: JSON.stringify({ text: "Hello from parlel!" }),
});
const { data } = await res.json(); // { id, text, edit_history_tweet_ids }

Implemented operations

All /2/* routes require Authorization: Bearer <token> (OAuth2 / app-only; any non-empty token accepted). State is in-memory and ephemeral.

• POST /2/tweets — create a tweet (201 { data: { id, text, edit_history_tweet_ids } }). Empty text → 400.
• GET /2/tweets/:id — retrieve a tweet ({ data: {...} }, or { errors: [...] } when missing).
• DELETE /2/tweets/:id — delete a tweet ({ data: { deleted: true|false } }).
• GET /2/users/me — the authenticated user ({ data: { id, name, username } }).
• GET /2/users/by/username/:username — look up a user by handle.
• POST /2/users/:id/likes — like a tweet ({ data: { liked: true } }). Body { tweet_id }.

Service & inspection operations (parlel extensions)

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

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.

X_TWITTER_ACCESS_TOKEN=parlel
X_TWITTER_BASE_URL=http://parlel-bridge:4800