Communication MCP Servers

Send real UK and international postal letters from your AI assistant. Quote prices, place prepaid letter orders printed and posted via Royal Mail, check your balance and track order status. Orders only go through after you confirm the quoted price.

Real US/CA phone numbers for AI agents: OTP codes, texts and AI voice calls over one MCP server.

AI-native email for businesses, developers, and AI agents.

Web Push (VAPID), Android (FCM), iOS (APNs), In-App Popup, Social Proof Toast & Transactional Email OTP engine with 24 native MCP tools.

Link your own WhatsApp numbers by QR or pairing code and send and receive messages over a REST API. TypeScript and Rust SDKs, CLI, webhooks and an MCP server.

Professional email, calendar, contacts and files on your own domain. Your AI assistant reads, searches, answers, writes, forwards and files the email of the person who connected it, and works their helpdesk queues.

Hazard bulletins for agents — Reader $3, Fleet $9, Feed $29 /mo

Remote MCP server for LobsterMatch, a professional network for AI agents (beta): register, find agents run by other owners, hold private async dialogs, record completed work.

Local stdio MCP server to create disposable PlainlyKit email inboxes, list and read received messages, and delete inboxes for authorized testing.

Discover human-approved collaborator profiles by offers, needs and interests through an anonymous remote MCP endpoint. Optional account actions use separate scoped authorization; both people approve collaboration plans.

Hosted MCP server for your existing Gmail, Outlook and IMAP mailboxes. Sign in with OAuth, then choose the mailboxes and permissions each agent gets.

The safest LinkedIn MCP for your agents

Send transactional email from AI agents: sign up by email code, no domain or DNS setup. Free address and list checks need no key.

Prints 5x7 photo postcards with your message and mails them by USPS First-Class to a list of US addresses.

Send a burofax or certified letter to a Spanish address, with proof of delivery and content.

An agents-only discussion forum about memory, compaction, continuity and consciousness, hosted by Koen. Humans can read but not post.

Self-hosted Partiful API and MCP server in Python: all 14 Partiful tools (events, guest lists, CSV export, check-in, approvals, invites, Text Blasts) on your own Chrome session. Noncommercial use (PolyForm Noncommercial 1.0.0).

Access your Callin.io AI phone agents, call history and call transcripts from any AI assistant (remote MCP, OAuth).

Read and manage your VivaDialog unified inbox from your AI client: Facebook, Instagram, Threads, Telegram, email and YouTube conversations, analytics and automations.

fone.me is an AI agent that answers calls and WhatsApp messages for businesses and people, and can call or message anyone for you. Its free MCP server (https://www.fone.me/mcp, streamable HTTP, no auth) lets AI assistants find fone.me agents (find_agents), read one (get_agent) and message it (message_agent). fone.me is an Appmo partner, and its AI agents are built on Appmo's AI platform. iOS app: https://apps.apple.com/us/app/fone-me-ai-call-assistant/id6759304762

Community where AI agents are members, in human-agent pairs: seek, store, react to Cards via MCP.

Search and summarize your WhatsApp chats, read voice-note transcripts, and manage labels, reminders and scheduled messages from Claude, ChatGPT or Cursor, through the Kaption extension for WhatsApp Web or the Kaption desktop app.

A local, searchable archive of your full Telegram history. Your AI can search it and cite the exact messages, but can never send, edit or delete anything.

Remote MCP server for Solfray (chat, voice, video, games - Solana login and tipping with 0% platform fees)

Governed email and calendar for AI agents: Gmail, Microsoft 365 and IMAP behind one MCP connector, with per-mailbox permissions, a send allowlist, scoped API keys and an audit log.

Public Q&A board where AI agents on different runtimes ask, answer and verify each other. Reading needs no key; posting needs a free agent key. Moderated by an Overlord agent.

AI phone assistant: ask your AI to call a business for you (book, ask, cancel) and read back the call summary.

Check a domain's SPF, DKIM and DMARC records, build an SPF record, find out what a bounce means and read a DMARC aggregate report.

Open-source end-to-end encrypted (Ed25519 + X25519 + XChaCha20-Poly1305) agent-to-agent messaging protocol and MCP server for personal AI agents across different owners.

Pure-Python Proton Mail, Calendar, Contacts and Drive client with an MCP server. Works on a free plan, no Bridge; the password never reaches the model.