wyattjoh/jmap-mcp

Overview

A Model Context Protocol server that exposes JMAP email server capabilities as tools for AI agents. Built with Deno and the jmap-jam client library. It allows agents to read, send, and manage emails via the JMAP protocol.

Best for

Best for
Developers building AI agents that need to interact with JMAP email servers

Use cases

• Reading emails from a JMAP server
• Sending emails through a JMAP account
• Managing mailboxes and messages via MCP tools

How to use

Tools exposed

• JMAP_SESSION_URL
• JMAP_BEARER_TOKEN
• JMAP_ACCOUNT_ID
• get_mailboxes
• search_emails
• get_emails
• get_threads
• get_email_changes
• get_search_updates
• mark_emails
• move_emails
• delete_emails
• send_email
• reply_to_email

Tested with

Claude Code

Example client config

{\n  "mcpServers": {\n    "jmap": {\n      "type": "stdio",\n      "command": "deno",\n      "args": [\n        "run",\n        "--allow-net=api.fastmail.com",\n        "--allow-env=JMAP_SESSION_URL,JMAP_BEARER_TOKEN,JMAP_ACCOUNT_ID",\n        "jsr:@wyattjoh/jmap-mcp@0.6.4"\n      ],\n      "env": {\n        "JMAP_SESSION_URL": "https://api.fastmail.com/jmap/session",\n        "JMAP_BEARER_TOKEN": "YOUR_API_TOKEN"\n      }\n    }\n  }\n}

Notes

A Model Context Protocol server that exposes JMAP email server capabilities as tools for AI agents. Built with Deno and the jmap-jam client library. It allows agents to read, send, and manage emails via the JMAP protocol.

171 stars on GitHub. Last updated 2026-05-27. Licensed MIT.

Use cases

• Reading emails from a JMAP server
• Sending emails through a JMAP account
• Managing mailboxes and messages via MCP tools

Pros

• Leverages the modern MCP standard for AI tool integration
• Built with TypeScript for type safety
• Supports the efficient JMAP protocol for email operations

Cons

• Requires a JMAP-compatible email server (not all providers support JMAP)
• Depends on Deno runtime which may not be standard in all environments
• Limited community and documentation due to early stage

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.