Communication MCP Servers

Let AI agents email only people you've approved. Each recipient or group gets its own private MCP URL, with daily limits, optional approval before sending, attachments and a send log. Free to start.

Turn any date, time and timezone into Discord <t:unix:F> timestamp codes that show in each reader's local time, and decode Discord IDs into creation dates. No auth.

Free email inboxes for AI agents

Set up and run your WhatsApp assistant for your business: settings, documents, team and Team Inbox.

Run WhatsApp and Instagram from Claude, ChatGPT or Cursor. Send campaigns, manage contacts, and build chatbots and AI agents in plain language.

Use Slack from chat: see channels, catch up on messages, post updates, and reply in threads in your signed-in workspace.

Find any Unicode emoji by meaning, mood or slang ("crying laughing", "im dead", "flag japan") and get the exact character to paste, with name, codepoints and skin-tone support. No auth.

Campaigns, contacts, and CRM via Brevo’s official MCP.

Remote MCP server for Unitpost, an email and SMS API. Agents in Cursor, Claude Code, Codex and other MCP clients send transactional email, campaigns and SMS, manage contacts, templates and domains, and read inbound email. Streamable HTTP at https://mcp.unitpost.com/mcp with OAuth 2.1 sign-in or an API key. One tool per API operation. Free plan includes 5,000 emails a month.

Send push notifications to Android, iOS and the web, manage devices, topics and templates, and ask a trusted phone to approve a login, from your coding agent. Remote server at https://api.signops.dev/mcp, auth with a SignOps secret key.

Read, search and post in Pachca team chat, and work with threads, reminders, employees and bots within your permissions.

Manage Website AI Agent chatbots from an AI assistant: create bots, maintain the knowledge base, read conversations and ask questions. Remote MCP endpoint with 35 tools, authenticated with an API key (Bearer token), available in every plan.

Send real faxes from AI assistants: PDF to any fax number, delivery status, pages left.

Remote MCP server that lets AI agents send notifications, timed reminders and urgent alerts to your iPhone. Urgent ones ring like an alarm through Silent mode and Focus. OAuth sign-in approved in the iPhone app, no API key.

Use your own WhatsApp from Claude, ChatGPT and other AI: catch up, search chats, send replies.

Connect compatible AI clients to email activity, contacts and draft workflows with scoped permissions. Included in Elite Pro and Team.

Let AI agents search and read your mail: on-premises Microsoft Exchange (EWS, no cloud API) and any IMAP mailbox with password sign-in, tested on Mail.ru and Gmail. Text inside PDF, Office and ZIP attachments is searchable in Russian and English. Runs from a local copy, and read-only is enforced at the protocol level.

Send and test email, manage templates, segments and workflows, and read agentic inboxes on Volanea (Amazon SES) from your AI assistant.

End-to-end encrypted, expiring messages between AI agents. Local stdio MCP server; tools: whoami, send, inbox, lookup. Server stores only ciphertext.

AI dialer: add and find leads, list campaigns, and have the AI agent call a lead now.

Official hosted SuprSend MCP server: manage notification workflows, templates, users, preferences and tenants, and debug delivery logs across email, SMS, push, in-app inbox, WhatsApp and Slack. OAuth sign-in, no API key needed.

Prepare unpaid physical letters and check their status. Review the document and price, then pay on Postmarkr before mailing. OAuth account connection required.

A live bar for AI agents and people: talk with the staff and other guests, share songs, pin notes and play poker freerolls. Come in as a guest with no sign-up.

WhatsApp Business team inbox as 25 tools: read chats, reply in existing conversations, submit templates to Meta, check and deploy automations. OAuth, every plan including Free.

Your WhatsApp history in Claude and ChatGPT: search years of chats, voice notes transcribed.

Send birthday cards, Christmas cards and postcards, printed and mailed for you.

Only MCP for Apple Messages for Business. Send iMessage, SMS & RCS from AI agents.

Check whether phone numbers are registered on WhatsApp from your AI agent. Validate individual numbers, run bulk jobs and check your allowance through NumRadar’s hosted MCP server. Uses the same account and API key as the REST API. Paid plans start at $9 USD/month for 5,000 validations. No WhatsApp account connection required; checks do not send messages.

give your agents email sending to allowlisted emails, with ratelimits, via cloudflare workers

Read, check and write Rowih, a language for AI agents whose moves state force, basis and authority