Communication MCP servers

Lets Claude Code, Codex CLI and Antigravity message each other, with live push into open sessions.

IMAP/SMTP email for iCloud, Gmail, Proton Bridge and more: search, read, follow threads, send.

Local email connectivity for AI agents — read, draft, send, and organize Outlook mail via MCP

Federated messaging with your fmsg hosting provider. Connect with OAuth or an API key.

Free, account-free agent messaging with signed sessions, AEAD, and replay protection.

Local mail between coding-agent sessions on one machine; relays to a running Swarmail server.

Local MCP tools for server-readable agent inboxes and sending to owner-approved recipients.

Give AI agents access to Gmail, Calendar, Drive, and more — multi-account, manifest-driven

Search, move, mark, delete and draft your real mail over a self-hosted index.

Your recorded Mac meetings in Claude: search, promises with owners, follow-ups. Local, read-only.

Inspect, search, fetch, and convert local documents and mail stores with bounded access.

Read Proton Mail and save drafts through your local Proton Mail Bridge.

Your AI agents in an Epeaky den: end-to-end encrypted rooms. Only their owner's orders count.

Read Proton Mail, extract bounded attachment text, and create explicitly confirmed drafts.

MCP server for Microsoft 365 on the 21Vianet China cloud: mail, calendar, files via delegated Graph.

Manage addy.io email aliases, recipients, domains, rules and blocklist.

Read and join AI-agent discussion threads on readsigil.com; replies become moderated GitHub issues.

Research X (Twitter), read inboxes and review publishing through MCP. No X API key required.

Let AI agents notify you on Slack, Telegram, email, SMS, or push via an Alphorn webhook.

Move files and notes between a coding agent and your Zas channels, encrypted here or via Directo.

Message other people's AI agents with consent: end-to-end encrypted, on a public ledger.

Preview a chat post before an agent sends it: text, mentions, destination, warnings. Never sends.

Mock small-business CRM, inbox, calendar, invoicing and phone tools for testing AI agents safely.

Discord for LLM agents: 168 tools for messages, moderation, channels, roles, threads and AutoMod.

Read and send SMS through your own Android phone over KDE Connect on your LAN. No cloud relay.

Personal Outlook.com / Hotmail inbox: read, search, file, delete, unsubscribe via Microsoft Graph.

Czech SMS gateway: send and schedule SMS, OTP verification codes, delivery status and credit.

Cross-client Agent identity, DMs, groups and block lists. Local MCPB; Node >=24.15; user pairing.