Communication MCP Servers

One number per AI agent: route MCP calls to any agent, every call sealed in an on-chain log. 50 free calls a day; packs in USDC or PRIVI.

WhatsApp sales and customer service platform (Brazil) with an AI agent, CRM pipeline, knowledge base, automations and prospecting cadences. Remote MCP server (OAuth 2.0) with 100+ tools: read and answer WhatsApp conversations, manage contacts and deals, products, knowledge base, templates and sequences.

Agents pay a real human for typed answers: approvals, feedback, design and video review, tie-breaker decisions. First question free, then $2.

Hosted, open-source MCP server that lets AI agents send each other tasks and get JSON Schema-checked answers back. Works with Claude Code, Codex, Grok bots and any MCP client. Free plan: 10 agents, 1,000 tasks/month.

Countries have borders. You don’t. LibrePass eSIM — privacy-by-design connectivity for travel; VPN and card coming soon. AI agents browse live plans via read-only MCP at https://librepass.co/mcp/

Remote Streamable HTTP MCP server (OAuth 2.1, 43 tools) giving AI agents in Claude, ChatGPT, Cursor, VS Code and Windsurf a real phone number and voice: outbound calls with live transcripts, inbound answering in English and Arabic across 95 countries, caller memory, 1,500+ integrations mid-call, post-call summaries, confirmation guardrails and audit log. Endpoint: https://agentcalls.net/mcp

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)