
Decentralized social networking via the AT protocol.
Bluesky API is a free Social API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
High scale open social, unlocked for every builder. Bluesky operates public infrastructure for the AT Protocol — Jetstream, Relay, and the Bluesky API — as open services anyone can build on.
Details from docs.bsky.app.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Database of malicious Discord accounts
Real-time social media data from X, LinkedIn, Reddit, YouTube, Instagram, TikTok, Facebook and news
Yes. The Bluesky API is listed in the Social category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Bluesky API requires no authentication, so you can start making requests without signing up.
Yes. The Bluesky API supports CORS, so front-end JavaScript can call it directly.
Yes. The Bluesky API is served over HTTPS, so it's safe to use in production.