Postbase

@postbasehq/mcp

The Model Context Protocol server for Postbase, the open-source social media scheduler. Add it to Claude, Cursor or any MCP client and let your AI agent draft and schedule posts and threads to X, LinkedIn, Bluesky and Mastodon. (TikTok and YouTube need a video, so schedule those in the app.)

Post everywhere. Even from your AI.

Hosted server (no API key)

Postbase also runs this server for you at https://mcp.postbase.so/mcp, with OAuth sign-in instead of an API key. Add that URL as a custom connector in Claude or ChatGPT, or as a remote MCP server in Cursor, VS Code, Windsurf, Claude Code or Gemini CLI. The MCP config generator prints the exact setup for each one.

Use this npm package when you want an API key instead, or a self-hosted Postbase.

Quick start

1. Create an API key in your Postbase dashboard under Developers.
2. Add the server to your MCP client config (see examples below).
3. Ask your agent: "Schedule this thread for 9am to X and Bluesky."

Example configs

Any MCP client — the minimal config:

{
  "mcpServers": {
    "postbase": {
      "command": "npx",
      "args": ["@postbasehq/mcp"],
      "env": { "POSTBASE_API_KEY": "pb_live_your_key_here" }
    }
  }
}

Claude Desktop — add the same block to your config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Then restart Claude Desktop.

Cursor — add it to ~/.cursor/mcp.json (or Settings → MCP):

{
  "mcpServers": {
    "postbase": {
      "command": "npx",
      "args": ["@postbasehq/mcp"],
      "env": { "POSTBASE_API_KEY": "pb_live_your_key_here" }
    }
  }
}

Local development — point at a Postbase instance running on your machine:

{
  "mcpServers": {
    "postbase": {
      "command": "npx",
      "args": ["@postbasehq/mcp"],
      "env": {
        "POSTBASE_API_KEY": "pb_live_your_key_here",
        "POSTBASE_API_URL": "http://localhost:3000/api/v1"
      }
    }
  }
}

Tools

Tool	What it does
list_channels	List the channels connected to your workspace.
create_post	Create a draft, or schedule a post or thread: channel_ids, scheduled_at (ISO 8601 with an offset) or schedule_in_minutes, channel_bodies for per-channel text, media_ids or media_urls, youtube details, and an idempotency_key so retries can't post twice. TikTok posts can only be drafts.
get_post	How a post went on each channel: status, live URL, error, retry time and latest metrics.
update_post	Edit or reschedule a draft or scheduled post; only the fields you pass change.
retry_post	Send a post again to the channels where it failed.
get_analytics	Impressions, likes, comments, shares and saves per post and channel, with totals.
list_media	List images and videos in your Postbase media library, to attach by id.
add_media	Add an image or video to the media library from a public https link.
list_scheduled	List scheduled posts, or drafts, published or failed ones with status.
cancel_post	Cancel a scheduled post by id (it goes back to a draft).
schedule_thread	Create a thread (tweets in order). Kept for older setups; create_post with thread does the same.

Environment

Variable	Required	Default
POSTBASE_API_KEY	yes	—
POSTBASE_API_URL	no	https://www.postbase.so/api/v1

For local development against a Postbase instance on your machine, set POSTBASE_API_URL=http://localhost:3000/api/v1.

License

AGPL-3.0-or-later. Part of the open-source Postbase project.