PostFast MCP – schedule social posts to 11 platforms from Claude/Cursor/ChatGPT

MCP server for the PostFast API — schedule and manage social media posts via AI tools like Claude, Cursor, VS Code, and more.

Prefer not to run anything locally? Connect to the hosted endpoint and authenticate with OAuth — no npx, no API key to manage:

https://mcp.postfa.st/mcp

Add it as a remote/streamable-HTTP MCP server in any client that supports OAuth (e.g. ChatGPT, Claude). You'll be prompted to sign in to PostFast and authorize access on first use.

Want to run the server yourself instead? Use the npx + API-key setup in Quick Start below.

Log in to PostFast, go to API in the sidebar, and generate a key.

Choose your preferred method:

Download the extension from the Claude Desktop extension directory or install manually:

• Add to claude_desktop_config.json

:

{
  "mcpServers": {
    "postfast": {
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

• Restart Claude Desktop.

Via plugin (pending marketplace approval):

/plugin install postfast@claude-plugins-official

After installing, set your API key — pick one of these:

export POSTFAST_API_KEY="your-api-key-here"

Then restart Claude Code.

Via manual config:

Add to your project's .mcp.json

or ~/.claude/.mcp.json

(global):

{
  "mcpServers": {
    "postfast": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

Add to your MCP config (.mcp.json

, mcp.json

, or the tool's settings UI):

{
  "mcpServers": {
    "postfast": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

Ask your AI assistant things like:

• "List my connected social accounts"
• "Schedule a post to Instagram for tomorrow at 9am"
• "Show me all scheduled posts for this week"
• "Upload this image and create a LinkedIn post with it"
• "Create a Facebook reel with this video"
• "Show me analytics for my Instagram posts this month"

Facebook, Instagram, X (Twitter), TikTok, LinkedIn, YouTube, BlueSky, Threads, Pinterest, Telegram, Google Business Profile

When creating posts, you can pass platform-specific settings via the controls

parameter:

The upload_media

tool handles the full flow in a single call:

• Detects content type from file extension
• Gets a signed upload URL from PostFast
• Uploads the file
• Returns a key

andtype

ready to use increate_posts

Supported formats: JPEG, PNG, GIF, WebP, MP4, WebM, MOV

You can also use get_upload_urls

directly if you need more control over the upload process.

Verify everything works with the MCP Inspector:

POSTFAST_API_KEY=your-key npx @modelcontextprotocol/inspector npx postfast-mcp

Full REST API documentation: postfa.st/docs

npm install
npm run build
node dist/index.js

MIT