Posting to Bluesky Programmatically with the AT Protocol

Bluesky is built on the AT Protocol, and the official @atproto/api package makes posting straightforward.

Install

npm install @atproto/api

Log in and post

import { AtpAgent, RichText } from '@atproto/api';

const agent = new AtpAgent({ service: 'https://bsky.social' });
await agent.login({ identifier: 'you.bsky.social', password: process.env.BSKY_APP_PASSWORD });

const rt = new RichText({ text: 'New post: https://mystite.com/my-article' });
await rt.detectFacets(agent);
await agent.post({ text: rt.text, facets: rt.facets });

Tips

• Use an app password, not your main password.
• Posts are limited to 300 characters — share a teaser plus a link.
• detectFacets turns URLs and mentions into clickable links.