Bluesky MCP Server

Cloudflare Worker MCP server for Bluesky/AT Protocol, built with Hono and the Model Context Protocol SDK.

What It Does

The server exposes a broad set of Bluesky tools for LLM clients and agents:

• Authentication and session introspection

• Handle and DID resolution

• Profile lookup, timeline, author feeds, threads, followers, follows, notifications

• Search for posts and users

• Create posts, replies, quotes, and deletes

• Like, unlike, repost, and unrepost

• Follow, unfollow, mute, unmute, block, and unblock

• Blob uploads and image posts

• Bluesky chat conversation listing, retrieval, creation, and messaging

Related MCP server: mcpbluesky

Configuration

Set these as Cloudflare Worker secrets or vars:

• BLUESKY_IDENTIFIER - your Bluesky handle or DID

• BLUESKY_APP_PASSWORD - recommended app password

• BLUESKY_PASSWORD - fallback password variable

• BLUESKY_SERVICE_URL - optional custom PDS/service URL

• BLUESKY_PDS_URL - optional alias for the service URL

You can also pass per-request credentials using headers (useful for multi-user clients):

• x-bluesky-identifier

• x-bluesky-app-password (preferred) or x-bluesky-password

• x-bluesky-service-url or x-bluesky-pds-url

Example:

curl -X POST "https://bluesky-mcp-server.shraj.workers.dev/mcp" \
  -H "content-type: application/json" \
  -H "x-bluesky-identifier: your.handle.bsky.social" \
  -H "x-bluesky-app-password: your-app-password" \
  -H "x-bluesky-service-url: https://bsky.social" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Example:

wrangler secret put BLUESKY_IDENTIFIER
wrangler secret put BLUESKY_APP_PASSWORD

Quick Start

bun install
bun run dev

The MCP endpoint is available at /mcp.

Deploy

bun run deploy

Deployed URL:

https://bluesky-mcp-server.shraj.workers.dev

The root URL redirects to this repository on GitHub; use /mcp for MCP clients.

Client Setup

Copy-paste setup guides for IDEs and desktop clients live in docs/clients.md.

Cursor

Add this to your Cursor MCP config:

{
  "mcpServers": {
    "bluesky": {
      "url": "https://bluesky-mcp-server.shraj.workers.dev/mcp"
    }
  }
}

For authenticated tools (post, reply, like, etc.), pass headers:

{
  "x-bluesky-identifier": "your.handle.bsky.social",
  "x-bluesky-app-password": "your-app-password"
}

If your client asks for a server URL override, use:

{
  "x-bluesky-service-url": "https://bsky.social"
}

Agent Setup

Copy-paste setup guides for agent-style clients live in docs/agents.md.

Development

bun run typecheck
bun run build

Open Source Notes

This repo is set up to be easy to fork and run:

• TypeScript-first source

• Minimal runtime assumptions beyond Cloudflare Workers

• No hidden setup scripts

• Copyable client and agent config examples

• Clear environment variable naming for self-hosting

Contributing

See CONTRIBUTING.md for the contribution workflow and repo conventions.

Security

See SECURITY.md for responsible disclosure guidance.

Inspiration

This server was shaped by common tool surfaces in Bluesky and AT Protocol MCP projects such as brianellin/bsky-mcp-server, semioz/bluesky-mcp, and cameronrye/atproto-mcp.

Sponsored / Created By

Sponsored/created by IndexFast.

Follow us on Bluesky: indexfast.bsky.social