Local Fastmail MCP Server

A locally-hosted MCP server that connects your AI assistant to Fastmail via the JMAP API.

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What is the Local Fastmail MCP Server?

A locally-hosted MCP server that connects your AI assistant to Fastmail via the JMAP API.

What it actually does

A locally-hosted Model Context Protocol server that connects your Fastmail account to any MCP-compatible AI assistant (such as Claude Desktop, Cursor, or similar tools).

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
list_mailboxesDiscover all labels, folders, and mailboxes in your account. Returns each mailbox's ID, name, role, unread/total counts, and permissions.
list_emailsQuery emails by folder, keyword search, or read/unread status. Supports pagination for large result sets.
read_email
send_email
mark_email_read
move_email
delete_email

How to install the Local Fastmail MCP Server

{
  "mcpServers": {
    "local-fastmail": {
      "command": "node",
      "args": [
        "/absolute/path/to/your/local-fastmail-mcp/dist/index.js"
      ],
      "env": {
        "FASTMAIL_EMAIL": "your_email@fastmail.com",
        "FASTMAIL_API_TOKEN": "YOUR_FASTMAIL_API_TOKEN"
      }
    }
  }
}

From the project documentation. Replace placeholders and example paths before connecting.

Configuration

VariableDescriptionRequired
FASTMAIL_EMAILDeclared in the maintainer’s client configuration.Check documentation
FASTMAIL_API_TOKENDeclared in the maintainer’s client configuration.Check documentation

Example prompts to try

  • “Use Local Fastmail MCP to list mailboxes.”
  • “Use Local Fastmail MCP to list emails.”
  • “Use Local Fastmail MCP to read email.”

Frequently asked questions

A locally-hosted MCP server that connects your AI assistant to Fastmail via the JMAP API. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.