"Understanding Integrated Knowledge Graphs" matching MCP servers:

• Gmail MCP

  Evyatar108

  A

  license

  -

  quality

  C

  maintenance

  Local MCP server providing Gmail tools (search, read, draft, send, trash) via Google's official API, integrated with GitHub Copilot CLI.

  Last updated 2026-07-14

  MIT

• gmail-drive-mcp-server

  SmitPatel-31

  A

  license

  -

  quality

  D

  maintenance

  Enables Claude to manage Gmail, Google Calendar, and Google Drive, including sending emails, scheduling meetings, and organizing files, with integrated workflows.

  Last updated 2025-07-14

  5

  MIT

• Notmuch

  hgn

  A

  license

  A

  quality

  B

  maintenance

  An MCP server that exposes a local notmuch email database to an LLM client such as Claude. It is read-first: searching, reading, and understanding mail is always available; writing anything (drafts, tags, exported files) requires an explicit opt-in flag and is confined to clearly bounded locations.

  Last updated 2026-07-26

  13

  MIT

• DragApp MCP Server

  nick-timms

  A

  license

  B

  quality

  B

  maintenance

  MCP server for Gmail shared inboxes and WhatsApp — read, reply, search, and organize your team's email from Claude, ChatGPT, or Cursor. 47 tools covering email threads, WhatsApp messaging, boards, contacts, knowledge base, analytics, and automations.

  Last updated 2026-07-15

  47

  137

  MIT

• MCP Calculator

  abenitez573

  F

  license

  -

  quality

  B

  maintenance

  An MCP server that enables AI models to perform mathematical calculations and other tasks like email operations and knowledge search through a bidirectional communication protocol.

  Last updated 2026-06-30

• RespondThat MCP server

  ryanyang828

  F

  license

  -

  quality

  C

  maintenance

  Enables AI agents to draft and send customer-support email replies, access brand knowledge, list mailboxes, and check credit balance via the RespondThat API.

  Last updated 2026-07-27