One API Call to Post on X / Twitter

The Twitter API v2 requires paid access tiers, strict OAuth 2.0 with PKCE, and imposes aggressive rate limits that vary by plan. RelayAPI handles OAuth, rate limits, media hosting, and API changes.

No credit card required · Free plan available

POST /v1/posts
const res = await fetch("https:">//api.relayapi.dev/v1/posts", {
  method: "POST",
  headers: {
    Authorization: "Bearer rlay_live_xxxx",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    content: "Check out our latest update!",
    platforms: ["twitter"],
    media: ["https:">//cdn.example.com/image.jpg"],
  }),
});

Twitter API v2

  • Paid API access is mandatory -- even basic posting requires at least the Basic tier at $100/month
  • OAuth 2.0 with PKCE and separate user-context vs app-context tokens adds significant auth complexity
  • Tweet thread creation requires sequential API calls with reply-chaining and careful error handling
  • Rate limits are extremely tight (e.g., 17 tweets per 24 hours on Basic tier) with opaque enforcement
  • Media uploads use a separate chunked upload endpoint with finalization polling before attaching to tweets

RelayAPI

  • Use your existing Twitter API credentials through RelayAPI without worrying about tier-specific endpoint restrictions
  • RelayAPI handles the full OAuth 2.0 PKCE flow, token storage, and automatic refresh for user-context operations
  • Post entire threads with a single API call -- pass an array of tweets and we chain the replies automatically
  • Intelligent rate limit tracking with request queuing, automatic backoff, and usage monitoring per account
  • Upload media to RelayAPI and we manage chunked uploads, processing status polling, and attachment to tweets
Save 3+ hours of development time

Supported content types

Text PostsImagesVideosPollsThreads

How it works

1

Connect your account

Authorize your X / Twitter account via OAuth in about 30 seconds.

2

Build your integration

Use the REST API or our SDKs to publish content from your stack.

3

We handle the rest

RelayAPI manages publishing, rate limits, and delivery notifications.

Ship Faster

Post tweets, threads, and media with a single API call. No need to manage chunked uploads, reply chains, or poll creation flows separately.

Official API, Zero Hassle

RelayAPI uses the official Twitter API v2. Your posts appear natively in timelines with full engagement metrics, while we handle token management and rate limit compliance.

Threads Without the Complexity

Creating Twitter threads requires sequential replies with error handling at each step. RelayAPI lets you send an array of tweet content and we handle the reply-chaining, media attachment, and error recovery.

Frequently asked questions

Do I still need a Twitter API key to use RelayAPI?

You connect your X / Twitter account through RelayAPI's OAuth flow. We manage the API credentials, token lifecycle, and access tier limitations on your behalf.

What content types can I publish to X / Twitter through RelayAPI?

RelayAPI supports text posts, images (up to 4 per tweet), videos (up to 2 minutes 20 seconds), polls, and multi-tweet threads. All through a single unified endpoint.

How does RelayAPI handle Twitter's strict rate limits?

We track rate limit headers in real-time across all your connected accounts, queue requests when limits are approached, and automatically retry with exponential backoff. You receive clear error messages instead of opaque 429 responses.

Can I post threads with RelayAPI?

Yes. Pass an array of tweet objects (each with optional media) in a single request. RelayAPI posts them sequentially as replies, handles failures gracefully, and returns the full thread with tweet IDs.

Start building with X / Twitter.

Join developers who chose RelayAPI over wiring up Twitter API v2 by hand.