fastmail-mcp
fastmail-mcp is an MCP server. It reaches fastmail. It needs FASTMAIL_API_TOKEN, FASTMAIL_CALDAV_PASSWORD and FASTMAIL_WEBDAV_PASSWORD to authenticate. Its repository has 130 GitHub stars and is licensed under MIT; we last read it on 2026-10-22.
Unofficial MCP server for the Fastmail JMAP API — email, contacts, and calendar tools for AI assistants. Not affiliated with Fastmail. Includes a DXT for Claude Desktop.
Install
MCP servers are packaged differently from each other -- some run via npx, some as a Docker image, some as a plain script you clone and run. fastmail-mcp’s own README did not state one plainly enough for this page to quote it rather than guess, so it will not guess. The repository below states it.
What it reaches, and what it needs
What it connects to
Unverified means a mention in the server’s own description, not a citation. A wrong claim here costs nothing to correct and nothing to trust yet.
Maintenance
Unofficial MCP server for the Fastmail JMAP API — email, contacts, and calendar tools for AI assistants. Not affiliated with Fastmail. Includes a DXT for Claude Desktop.
Common questions about fastmail-mcp
- What does fastmail-mcp do?
- Unofficial MCP server for the Fastmail JMAP API — email, contacts, and calendar tools for AI assistants. Not affiliated with Fastmail. Includes a DXT for Claude Desktop.
- How do I install fastmail-mcp?
- Its README did not state an install command plainly enough for us to quote one, so we do not guess. The repository has the instructions: https://github.com/MadLlama25/fastmail-mcp
- What does fastmail-mcp connect to, and what does it need?
- It reaches fastmail. The credentials we found in its source are FASTMAIL_API_TOKEN, FASTMAIL_CALDAV_PASSWORD and FASTMAIL_WEBDAV_PASSWORD.
- Which AI clients can use fastmail-mcp?
- Its own description mentions Claude Desktop. That is a mention in its description, not a test we ran.
- Is fastmail-mcp official and is it maintained?
- We found nothing naming it as a vendor’s official server. Its repository has 130 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-09-12.
- What licence does fastmail-mcp use?
- The repository declares the MIT licence.