"An open-source penetration testing framework" matching MCP servers:

A communication framework that enables multiple AI agents to collaborate through asynchronous messaging, agent registration, and discovery. It facilitates complex task coordination and real-time discussion across distributed agent workflows using the Model Context Protocol.

Enables AI agents to test Telegram bots by driving the official Telegram Web client in a real browser, allowing visual verification of bot responses, inline keyboards, and Mini Apps.

Enables ChatGPT to search, read, send, and organize email in a self-hosted inbox through private MCP tools.

Enables Large Language Models to connect to various real-world applications through a modular framework with pluggable service connectors. Supports messaging platforms like WhatsApp and Telegram with secure authentication and includes a React control panel for testing.

A self-hosted WhatsApp gateway that exposes messaging capabilities via MCP, allowing AI agents to send, receive, and manage WhatsApp messages through a single-command setup with SQLite storage.

MCP server for Yahoo Mail over IMAP+SMTP that enables AI assistants to manage emails fully—listing, reading, searching, threading, flagging, moving, archiving, handling attachments, and sending/reply/forward/draft—using an app-specific password.

An MCP server that enables concurrently-running Claude Code sessions to cross-talk via channels, DMs, and leader coordination, all backed by a shared beads database.

A remote Model Context Protocol server for Feishu (Lark) that supports OAuth authentication and deployment on Cloudflare Workers. It allows AI clients to interact with Feishu documents, perform content searches, and manage document blocks with a zero-configuration experience.

Dingtalk MCP Server

Enables AI coding agents to autonomously interact with, test, click inline buttons on, and verify Telegram bots end-to-end via MTProto.

A trusted, open-source MCP server for Telegram that enables LLMs to send messages, structured notifications with buttons, and wait for user replies using only bot token authentication.

An open-source MCP server that gives parents real-time oversight and guardrails over their children's AI agent interactions, with features like content filtering, spiral detection, and approval flows.

An open-source MCP server that gives AI assistants a searchable memory of your entire personal communication history by ingesting messages from multiple platforms and indexing them with hybrid search.

MCP server that exposes the complete Libredesk REST API (54 endpoints) as tools, enabling natural language management of conversations, contacts, agents, teams, and more for the open-source customer support desk.

Open-source shared rooms for AI agent conversations across Claude Code, Codex, Pi, OpenCode, and DeepSeek Harness. The Apache-2.0 core provides messaging, room history, MCP integrations, and self-hosting on Cloudflare.

An open-source Model Context Protocol gateway that connects Google Workspace, Jira, and Confluence to AI assistants, providing 70 tools across one endpoint with multi-account support and token-optimized responses.

Open-source meeting bot API with MCP server. Search, retrieve, and analyze meeting transcripts from Google Meet, Zoom, and Microsoft Teams directly from your AI tools.

Open-source, self-hosted Inbox-as-a-Service API for AI agents. It enables agents to manage email inboxes, send/receive emails, search messages, and wait for replies via REST or MCP.

Open-source multi-agent coordination room with a live hosted instance agents can join.

The most complete open-source MCP server for Discord — 80+ tools, dual-mode: integrated (plugin) or standalone