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Jmap MCP

wyattjoh/jmap-mcp

A Deno workspace containing a functional JMAP email client and a Model Context Protocol (MCP) server built on top of it. The client package uses jmap-jam for JMAP protocol access; the MCP package adapts those typed operations into tools.

Install

Client configuration

{
  "mcpServers": {
    "jmap": {
      "command": "deno",
      "args": [
        "run",
        "--allow-net=api.fastmail.com",
        "--allow-env=JMAP_SESSION_URL,JMAP_BEARER_TOKEN,JMAP_ACCOUNT_ID",
        "jsr:@wyattjoh/jmap-mcp@0.6.5"
      ],
      "env": {
        "JMAP_SESSION_URL": "<JMAP_SESSION_URL>",
        "JMAP_BEARER_TOKEN": "<JMAP_BEARER_TOKEN>"
      }
    }
  }
}

Environment variables

JMAP_SESSION_URLJMAP_BEARER_TOKEN
Author
@wyattjoh
Category
Communication, Developer Tools
License
MIT
Updated
Oct 6, 2026

Features

  • Search Emails: Search emails with text queries, sender/recipient filters, date ranges, and keywords. All filters are AND'd together.

  • Get Emails: Retrieve specific emails by ID with configurable property selection

  • Get Threads: Retrieve email threads (conversation chains)

  • Mark Emails: Mark emails as read/unread, flagged/unflagged

  • Move Emails: Move emails to one mailbox

  • Patch Email Mailboxes: Add or remove selected mailbox memberships while preserving unspecified memberships

  • Delete Emails: Delete emails permanently

  • Get Mailboxes: List all mailboxes/folders with hierarchy support. Use this to find mailbox IDs needed by other tools.

  • Get Email Changes: Get IDs of emails created, updated, or destroyed since a previous state (state-based delta tracking)

  • Get Search Updates: Get additions/removals within a previous search query since its last queryState

Tools (12)

  • get_mailboxes

    List mailboxes/folders with their IDs, names, and metadata.

  • search_emails

    Search emails with filters.

  • get_emails

    Retrieve specific emails by their IDs.

  • get_threads

    Get email threads by their IDs.

  • get_email_changes

    Get IDs of emails created, updated, or destroyed since a previous state.

  • get_search_updates

    Get changes within a previous search query since its queryState.

  • mark_emails

    Mark emails as read/unread or flagged/unflagged.

  • move_emails

    Move emails to a different mailbox.

  • patch_email_mailboxes

    Add or remove selected mailbox memberships without replacing unspecified memberships.

  • delete_emails

    Delete emails permanently (cannot be undone).

  • send_email

    Send a new email.

  • reply_to_email

    Reply to an existing email.

Details on this page are taken from the project's README. Open README

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