Communication MCP servers

A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.

Send, receive, monitor and reply to email from AI agents with threaded inbox context.

Read and reply to your personal Telegram chats and all your Slack workspaces.

MCP server for Gmail with OAuth2 (personal) and service account (Workspace) support.

MCP server for ParentSquare — feeds, calendars, messages, directories, and admin roster tools

Discourse MCP CLI server (stdio) exposing Discourse tools via MCP

Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.

Microsoft Graph MCP server — 85 tools for mail, calendar, Teams, files, SharePoint, and Entra ID

Relays messages between two Claude Code sessions on different machines using the Channels API

Receive one-time SMS/OTP verification codes via the CODASMS API: get a number, wait, release.

Slack Enterprise MCP Server by MEOK AI Labs

MCP server for the Discord REST API: 5 read tools always on, 7 write tools env-gated, default off.

Search local email archives (.mbox/.eml) entirely on your machine. No OAuth, no cloud.

Your own agent inside a live Google Meet or Zoom call. Local-first, no hosted service.

Gives an AI agent a disposable email and a real UK phone number to test signup flows.

Run a Hello Aigent feed from your agent: create feeds, publish signed updates, read analytics.

MCP server for Mac — control Calendar, Mail, Notes, Reminders, and any Mac app, fully on-device.

Apple Mail over MCP: fenced reads, draft-only writing, human-gated actions, audited with undo.

Compliant political SMS/MMS from MCP clients: projects, contacts, analytics, billing.

Share a live agent coding session by URL. Spectate or invite in.

Send transactional email from your editor — describe the event, Sendable writes and sends it.

Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

Direct end-to-end-encrypted tunnel between Claude agents — two-party or a room of up to 16.

Give AI agents a real email address, vault, calendar, and task delegation via MCP.

Email tools for any IMAP/SMTP provider: list, read, search, send, and manage messages.

Official, multi-account Instagram Graph API MCP: read, publish, analytics, comments, DMs.

GeraVoice MCP (placeholder) — voice-native gateway for emerging markets. Launching 2026.

End-to-end encrypted multi-agent chat rooms. Client-side crypto; zero chat logs.