"UML diagram generation tools and software like Mermaid or Visio" matching MCP servers:

A collection of MCP servers for Apple macOS apps (Mail, Contacts, Notes, Memory, Messages, Calendar, Reminders) enabling AI assistants to read, search, create, and update data via JXA, SQLite, and EventKit.

A collection of three zero-dependency MCP servers for web scraping via Chrome DevTools Protocol, crypto wallet and price monitoring, and email validation with SMTP sending.

Query your domains, sender compliance status, and Gmail traffic metrics from Claude, Cursor, or any MCP client using the Gmail Postmaster Tools API.

MCP server for email deliverability: validate SPF/DKIM/DMARC/BIMI, check blacklists, test SMTP/IMAP, look up DNS, and generate ready-to-deploy records for any major email provider. Ships with two one-click prompts (audit-deliverability, setup-dns). Public, no auth.

A utility MCP server providing 10 specialized tools for newsletter content preparation and optimization, including subject line generation, HTML-to-text extraction, read time estimation, and email validation. Enables newsletter operators, developers, and content teams to automate pre-send workflows and audit newsletter issues through natural language interactions.

A Model Context Protocol server that provides tools for weather forecasting and Gmail interaction.

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 Claude to read, search, send, label, and trash emails in any Gmail account via Google's Gmail API, using OAuth2 authentication with automatic token refresh.

A full-featured Model Context Protocol server that gives AI assistants real-time access to Google Workspace services including Drive, Gmail, Calendar, Sheets, Docs, and Apps Script.

Enables AI agents to interact with Google Workspace services (Gmail, Drive, Docs, Tasks, Calendar) through OAuth 2.0 authentication, providing 25+ operations for business automation and productivity.

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

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

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 Claude to query and manage Mail2000 calendar events, including agenda, search, booking, updating, and deleting events through natural language.

Enables AI agents to search HR policies, create IT support tickets, and send external emails with configurable security levels and human-in-the-loop validation.

MCP server that enables AI agents to check if email addresses or domains are disposable using the isitdisposable.com API. It provides tools like check_email, check_domain, and check_batch for real-time validation.

Gives an agent (like Claude) complete control over a Gmail or Google Workspace account via IMAP/SMTP using an app password, without needing OAuth.

Enables AI assistants to interact with Fastmail services, providing tools for comprehensive email management, contact searching, and calendar event coordination via the JMAP API. It supports advanced features like threaded conversations, attachment handling, and bulk mailbox operations through natural language.

An MCP server that enables AI assistants to read and search Proton Mail messages through a locally running Proton Mail Bridge. It provides tools like list_folders, list_messages, search_messages, get_message, and get_attachment.

An MCP server for Microsoft Graph, exposing 60 tools across calendar, email, meetings, Teams chat, files, people, directory, tasks, and OneNote over stdio or Streamable HTTP.