Postbase is an open-source social media API and MCP server that allows AI agents to schedule and publish posts to platforms like X, LinkedIn, Bluesky, and Mastodon. It provides tools for listing channels, creating posts, viewing scheduled content, and canceling posts, integrating directly with AI clients like Claude and Cursor.
- Operator: Postbase
- Endpoint: https://mcp.postbase.so/mcp
- Transport: streamable-http
- Sign-in: OAuth sign-in
- Category: Productivity and knowledge
- Use cases: Schedule social media posts to multiple platforms; List connected social media channels; Review scheduled post queue; Cancel scheduled posts before publishing
- Documentation: https://www.postbase.so/developers
- Directory listing: https://koskamo.com/explore/postbase-mcp
- Also known as: Postbase MCP MCP; postbase-mcp