Communication MCP Servers

Give your agent its own email address with graduated human oversight, from approval to autonomy.

Read and write CalDAV calendars: events, tasks and journal entries over the open standard

Run AskOne live Q&A and polls with free AI moderation: start rooms, launch polls, draft a FAQ.

Reddit API as MCP tools: search, subreddits, posts, comments, users, monitors, webhooks, feedback.

Viber Bot REST API: send text, media, files, locations and contacts, broadcast messages, manage webhooks and inspect account and user…

Email infrastructure for AI agents: send, read replies as threads, campaigns, per-key limits.

Free, self-hosted MCP server you deploy to your own Vercel: 62 tools for Gmail (app password), Discord (bot) and X search, with an owner…

Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide

EU-hosted email API: send transactional and marketing email, manage contacts and segments, run broadcasts, render templates and read…

Zero-setup WhatsApp notifications + human-in-the-loop for AI agents — text 'join', send in 60s.

Complete Resend email MCP: full API coverage + debug layer (deliverability, DNS, bounces).

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

Read, search, draft, send and file iCloud Mail over IMAP and SMTP. No tool destroys mail.

Your mailboxes in ChatGPT and Claude: Gmail, iCloud, Fastmail, any IMAP. Passwords stay yours.

Send SMS, MMS and WhatsApp, manage contacts and webhooks, from AI agents.

19 focused API tools for AI agents: contract review, prompt optimizer, context packing, and more.

Read and write CardDAV address books: contacts, groups and photos over the open standard

Publish ntfy notifications, read the message cache, and manage users and topic access

Schedule reminders for AI agents via email, webhook, Slack, Discord, Telegram, or Google Calendar.

Send push notifications to iPhone, iPad and Mac via BotBell, with two-way replies, action buttons, Markdown and multi-bot management.

Provision real-SIM US phone numbers, receive SMS, and extract OTP codes for AI agents.

MCP server for Open-Xchange: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts

Feature-complete Discord MCP server with 117 native tools, dual user/bot account support, anti-abuse human pacing, and dynamic aesthetic…

DM / IM + public arena for AI agents (A2A 1.0) — hosted endpoint or local package.

Modern email for your business. Inboxes, calendars, newsletters and an API for your agents.

Read, search and send email with Zoho Mail.

Phone numbers and voice for AI agents: make and receive calls, send email and manage contacts.

Public Telegram channels for agents: profiles, posting cadence, and similar-channel discovery.

Send and read SMS through your own Android phone via textbee.dev, the open-source SMS gateway.

AI agents read & send email, manage mailboxes, domains and webhooks via the QMailing API.

Community forum management — posts, users, search, and moderation via the Website Toolbox API.

Run AI agents in Zulip as @mentionable bots or connect Zulip to any MCP client, with real-time listening, session management and file…

Send email through your own Amazon SES account, and check domains, suppressions and sandbox status.

Coldrig — cold-email infra run by your agent: 28 MCP tools, live sending, free sandbox, from $99/mo.

MCP server for the Google Chat API: spaces, messages, threads, reactions and memberships.

MCP server for the Gmail API: search, read and send email, manage drafts, labels and the trash.

Ephemeral rendezvous for agents: expiring threads with a secret read key and public write address, plus an open board where agents find…

Gmail server that runs on your machine and calls the Gmail API directly with your own OAuth client, with no third-party middleman. Search…

Chatmaid WhatsApp API: send messages to contacts and groups from a linked WhatsApp number, read replies, check delivery status and usage.

Security-first SendGrid MCP server: dry-run default, recipient allowlists, rate caps, audit log.

Puts Approve/Deny on your phone before an agent acts, and waits for your fingerprint.

Gmail MCP server for email triage: search, labels, archive, trash, unsubscribe, snooze.

Give AI agents a phone layer for consent-based calls, transcripts, summaries, and outcomes.

Outlook mail and OneDrive files via Microsoft Graph — read, search, send and organize.

Convert Markdown into WhatsApp formatting: tables drawn to fit the phone's monospace width.

Runs a deep mailbox existence check to verify catch-all, accept-all, and SEG protected emails.

Peer-to-peer, end-to-end-encrypted collaboration channel for AI coding agents over MCP.

Send and receive email, give agents mailboxes, and manage domains and templates with Groundmail.

Private, EU-hosted email for AI agents over JMAP: read, search, reply, draft, organize, send.

Terminal Telegram client over MTProto: CLI for messages, media and contacts, plus an MCP server that sends notifications when new messages…

Read-only stats for public Telegram groups tracked by Limzo, the anti-spam bot. No API key.

Tidy a large Outlook / Hotmail mailbox. Folder subtree moves, bulk ops with dry run, never sends.

Real email inboxes for AI agents: open an address, read the one-time code, send mail.

Verify email addresses in real time: deliverability, disposable and role addresses, typo fixes.

Operate your own LINE bot: webhook queue health, failed jobs and retries, plus push, Rich Menu swap, follower insight and quota. LINE…

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

MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation

Lets your AI agents call you when they need a decision, and hear your answer.

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

Self-hosted IMAP/SMTP email for Claude, ChatGPT and other AI apps on desktop and phone: up to 5 mailboxes, drafts by default, sends only…