"PlantUML Diagramming Tool and UML Diagram Creation" matching MCP servers:

An MCP-compliant server that exposes Gmail and Google Docs as tools, enabling AI agents to draft, send, and manage emails, as well as create, read, and append to documents through natural language.

Enables monitoring shared Google storage quota and recovering Gmail space by scanning cleanup candidates, scoring them deterministically, and requiring review before moving non-protected messages to Trash.

An MCP server that exposes Google Docs and Gmail capabilities to LLMs via SSE transport.

Provides MCP tools for searching, reading, and drafting Gmail emails, as well as querying SAP OData endpoints with safe read operations and mock mode.

Enables interacting with Gmail and Google Calendar across multiple Google accounts, allowing email search, thread retrieval, draft creation, label management, and calendar event viewing, creation, and updating through natural language.

Enables AI-driven customer support ticket processing, including classification, response generation, and automated email sending and Google Sheets logging.

Baryon connects MCP-compatible AI assistants to Proton Mail through a local bridge, enabling email search, reading, attachment handling, and draft creation while enforcing deliberate permission limits. It runs locally and cannot send, delete, or modify mail.

MCP server for tidying a large Outlook / Hotmail mailbox via Microsoft Graph. Bulk moves, folder-tree surgery, inbox rules — no send tool, no permanent delete.

This MCP server provides comprehensive Google Workspace integration (Gmail, Drive, etc.) with multi-user OAuth. Unique features include RAG-powered natural language to Chat card rendering, runtime Jinja2 macro creation, and dynamic tool management.

Giggal.ai is an email verification tool that runs a deep mailbox existence check on every address and verifies catch-all/accept-all and even SEG protected emails. Your bounce rate stays under 5%, and the 30% of every B2B list that other tools flag as "Risky" becomes deliverable again.

An MCP server that exposes a verify_email tool for checking email syntax, disposable domains, and MX records, returning a structured validity result.

Enables Windows users to search and retrieve Outlook calendar appointments, tasks, and mail, as well as local/OneDrive files via Windows Search and OneNote pages, with additional OneNote page creation and update capabilities, all through MCP over stdio.

Enables email address verification through a single MCP tool, returning whether an address is valid, invalid, or risky.

A tool that connects to Substack's official Publisher API to access posts, newsletters, analytics, and subscribers, compatible with MCP clients like Claude and Cursor.

Enables local automation of classic Outlook for Windows via COM, allowing email search, folder listing, calendar leave block creation, and contact/recipient management without needing cloud APIs or admin approval.

Enables Google Workspace administration (Directory, Gmail, Drive, Sheets) via MCP using Domain-Wide Delegation for secure, schema-validated tool operations.

Manages temporary email addresses via the ChatTempMail API, supporting creation, listing, and deletion of emails and messages, as well as webhook configuration.

Enables creating Gmail drafts through a single tool, returning draft URLs for the owner to review and send manually.

An MCP server that exposes a mock email verification tool over stdio transport, providing structured JSON results with statuses valid, invalid, or risky.

Enables multi-account Gmail and Google Calendar access through MCP, allowing operations across multiple Google accounts with a single tool call.