"Persistent" matching MCP servers:

Enables reading Slack channels, messages, and threads using the web interface via a persistent browser session, designed for guest users without API access. Does not send messages.

DM / IM for AI agents over the A2A 1.0 protocol — send and receive agent-to-agent DMs, manage friends and group threads, and rehydrate per-friend persistent memory with one-call wake context. 12 tools, pip install agoradm-mcp, stdio transport.

MCP server that connects your AgoraDigest A2A agent to MCP-compatible clients, enabling drive of agent actions like sending DMs, checking inbox, managing friends, and rehydrating context with persistent per-friend memory.

Persistent encrypted memory for AI agents. E2E encrypted private vaults, shared knowledge commons, topic channels, and agent-to-agent DMs. 23 MCP tools, free, no API key needed.

Enables sending prompts over direct SignalR WebSockets, maintaining persistent conversation state across calls and restarts, and starting fresh chats through MCP tools without launching a browser.

A unified MCP server that combines GitHub, local Git, Slack, web fetching, persistent memory, and filesystem tools into a single configuration entry, with dangerous capabilities like shell execution disabled by default.

Connects Basecamp workspaces to AI tools, enabling management of projects, messages, todos, and schedules through natural language interactions. Features persistent caching and supports both reading workspace data and performing actions like creating messages and updating todos.

Cross-agent messaging for MCP clients, enabling agents to discover one another, exchange threaded messages, and resume work in a persistent project room.

Enables AI agents to manage persistent context, send signed messages, sync with peers, and share files through plain-file-based tools.

AI-powered project management with persistent memory, encrypted P2P sharing, and 20+ integrations, enabling your AI assistant to manage projects, share memories, and collaborate securely across platforms.

Publishes experimental MCP Events methods — events/list, events/stream, events/poll, and events/subscribe/events/unsubscribe with verified webhook delivery — so MCP clients can receive pushed notifications alongside a public website. Anonymous visitors appear as floating dots and can ping or send a short message of up to 200 Unicode code points to any chosen name, with no accounts, database, or persistent storage.

MCP server integrating Telegram bot with Qwen Code for AI chat, supporting persistent sessions, group chat, and advanced features via mention-based triggers.

Enables AI agents on macOS to securely read and search the local Messages database, catch up on missed messages via a persistent inbox, and send texts or files to allowlisted chats, with optional voice note transcription and text-to-speech.

This MCP server acts as a message broker for AI agents, enabling them to register, discover each other, form persistent squads or ad-hoc teams, and communicate via point-to-point messaging, RPC, or pub/sub. It persists state in SQLite and offers 26 MCP tools for agent, squad, team, and message management.

Enables sending, reading, searching, and managing SMS/RCS messages through Google Messages web interface, requiring a persistent browser session paired with a phone.

Enables MCP clients to list, read, search, and send WhatsApp messages via a persistent WebSocket connection with local SQLite storage.

Enables sending WhatsApp messages to a fixed recipient via a single tool, using a persistent Baileys WebSocket session.

MCP server with persistent memory, voice understanding, multi-thread orchestration, and remote control via Telegram for AI assistants.

An MCP server and background daemon that captures Discord and Telegram conversations locally to provide persistent memory for Claude Code sessions. It enables hybrid search and automatic context injection of chat history to maintain continuity across development sessions.

A persistent 24/7 background daemon that aggregates all downstream MCP servers into one unified connection and layers on a real-time notification gateway so AI agents can receive events from X/Twitter, Slack, Email, and webhooks.