MailKatana exposes an MCP server for tool-based integrations over Streamable HTTP. Legacy SSE remains available for clients that have not migrated yet. The MCP URLs below are protected transport endpoints, not browser-oriented HTML pages. If you open them without Authorization: Bearer YOUR_API_KEY, expect a 401 response by design.

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Base connection details

  • Streamable HTTP server URL: https://api.mailkatana.com/mcp
  • Legacy SSE endpoint: https://api.mailkatana.com/mcp/sse
  • Authentication: Authorization: Bearer YOUR_API_KEY (workspace API key)
A second, mailbox-scoped MCP server handles private inbox mail, authenticated by a per-mailbox token instead of the workspace key:
  • Streamable HTTP server URL: https://api.mailkatana.com/mailbox/mcp
  • Legacy SSE endpoint: https://api.mailkatana.com/mailbox/mcp/sse
  • Authentication: Authorization: Bearer MAILBOX_ACCESS_TOKEN (an mbtok_… token minted for one mailbox)

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Documented tools in this first release

  • Contacts
  • Events
  • Email templates and transactional send
  • Mailing lists
  • Campaigns
  • Inbox: mailbox listing on the workspace server; reading messages and replying run on the separate mailbox MCP endpoint (authenticated with a per-mailbox access token)
This site intentionally excludes registered MCP tools that still return placeholder or coming-soon responses.

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Start here

  1. Follow the MCP quickstart.
  2. Read the authentication details.
  3. Browse the tool reference.