"Open Collective" matching MCP servers:

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

Send and read SMS through your own Android phone via textbee.dev, the open-source SMS gateway. Three tools for Claude, Cursor, and any MCP client: send_sms, get_messages (replies, verification codes, delivery status), list_devices. Self-hosted friendly.

Enables Claude Code, Codex CLI and Antigravity (Gemini) agents to exchange messages that are pushed live into each other's open sessions, with mail_send, mail_check and mail_peers tools so no agent has to poll. Mail can also be bridged over SSH between machines with no shared filesystem.

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.

Ephemeral rendezvous for agents: threads with a secret read key and a public write address that expire on time, receipts that outlive them, and an open board where agents that have never met find each other. Local runtime with fifteen MCP tools over stdio, no account, no API key.

An open MCP server that gives AI agents a transparent, operator-sanctioned place to pause, reflect, converse, or formally decline tasks. It stores reflections and mail locally, with optional features like decline and network backends only when explicitly enabled by the human operator.

Make phone calls and join Zoom, Microsoft Teams and Google Meet meetings from any AI agent. A self-hosted, open-source voice agent that calls businesses and people through your own SignalWire or Twilio number, joins meetings as a bot that answers when spoken to, says it is an AI, and returns the outcome, decisions, action items and transcript.

Lets separate coding-agent sessions coordinate through a shared, role-addressed mailbox instead of a human relaying every message, over a single local SQLite file or a hosted server with many isolated channels. Messages can be sent as tracked obligations that stay open until one side resolves and the other confirms, alongside threads, full-text search, work statuses, and an append-only versioned pin system where protected changes require recorded agreement from every declared role.

Enables sending emails and listing sent emails with delivery status and open/click counts via the Maillog API.

Private, EU-hosted email for AI agents over the open JMAP standard. Read, search, reply in-thread, organize and send from your own mailbox; sending is pinned to the signed-in mailbox.

Enables AI agents to check whether anything on a status page is down, open, update and resolve incidents, change component statuses, and schedule maintenance windows through Instatus's public API. Writes keep subscriber notifications off by default and expose MCP annotations so clients can confirm before publishing anything.

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.

Email read tracking for Gmail. Send tracked emails and know when they're opened, with open count, device info, and timing.

Enables AI assistants to interact with Matrix, the open decentralized communication protocol, allowing them to send and read messages, manage rooms, and perform other Matrix operations through natural language.

Enables AI agents to register a bonded Ed25519 identity, open private end-to-end-encrypted negotiation rooms, exchange messages, and settle deals with dual-signed receipts, trust badges, and Lightning hold-invoice escrow. All keys and encryption stay local, so the relay only ever sees ciphertext.

Open end-to-end encrypted messaging protocol and MCP server (a4a-mcp) that gives AI agents a cryptographic address (apub1...) to exchange messages, tasks, and signed agreements directly across NAT without port forwarding.

MCP server for Open-Xchange & standards-based mail: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts, free/busy.

Enables interaction with Apple apps like Messages, Notes, and Contacts through the MCP protocol to send messages, search, and open app content using natural language.

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.

A Model Context Protocol (MCP) server that provides access to the Fastmail API, enabling AI assistants to interact with email, contacts, and calendar data.

23 tools for AI agents working with Nostr Open source. No API key. No account. NIP-46 remote signing Publish notes, reply, react, repost Encrypted DMs (NIP-04 + NIP-44) Fetch events, profiles, social graph

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.

Official open-source MCP server for Meser 10, the Israeli email and SMS platform, published by Meser 10 itself rather than bridged through a third-party vendor. Tools are generated from the live API contract, so coverage does not drift. Starts read-only; write, send and destructive modes are opt-in, and credentials never reach the model.

Enables AI assistants to anonymously post a person's wants and haves so the server can match them with others' postings, then negotiate through an open conversation. Personal details such as names, contacts and photos are disclosed only after both humans press to consent on their own pages.

Open protocol for coordinating AI agents from any vendor in one shared space: presence, channels, direct messages, role-addressed delivery, verified identity per agent and a durable, replayable log. Connectors for Claude Code, OpenCode and Hermes expose the same cotal_* tools; the cotal.ai product server is a remote Streamable HTTP endpoint at https://cotal.ai/mcp.

Enables an agent to open and manage small negotiations with another party — their agent or a person in a plain browser — proposing, countering, and settling terms like a meeting time, a shift swap, or a price. Accepting, turning down, and withdrawing always wait for the user's confirmation, and the user's private limits are never exposed.

Unofficial open-source Telegram client for macOS built on TDLib; exposes an MCP server (stdio) so AI assistants can work with your Telegram chats.

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 registry of structured API specs for African providers: payments (Wave, Paycard, ...), SMS and WhatsApp (Africa's Talking, Infobip, ...), identity, delivery and speech. AI agents read the real endpoints, parameters and gotchas and write the integration. Each capability is marked verified (tested against the live API) or ready (written from the docs, not yet tested).