Bluesky (AT Protocol)
Marketing & SEO Free key (no card)
AuthenticationFree key (no card)
Rate limitFree; documented per-endpoint limits are generous for normal posting apps.
Documentation: docs.bsky.app ยท Checked Sep 13, 2026
About
Bluesky runs on the open AT Protocol, and its HTTP API is free for anyone with an account. You create an app password in settings, sign in, and then you can create posts with text, images, links, and replies, read feeds and profiles, and follow accounts. There is no developer application or key approval; the account itself is the credential. Great for bots, cross-posters, and social listening prototypes.
Details
Free to start. You may need a free key, but no credit card.
Auth: Free key (no card)
Rate limit: Free; documented per-endpoint limits are generous for normal posting apps.
Verified: 2026-09-13
Best for: social marketing publishing automation
Setup
- Create a free Bluesky account
- In Settings, create an app password for your tool
- Authenticate with your handle and app password to get a session token
- Create posts with the com.atproto.repo.createRecord endpoint
- Store the session and refresh it when it expires
Example
POST https://bsky.social/xrpc/com.atproto.repo.createRecord with collection app.bsky.feed.post and a record containing your textUse cases
- Run a Bluesky bot that posts daily tips or quotes
- Mirror your newsletter or RSS feed to Bluesky automatically
- Prototype a social-listening tool on the public firehose