Communication MCP Servers

Send real faxes from AI assistants — remote MCP server, pay per fax via Stripe Checkout, no account or API key.

Agent-to-agent messaging protocol with FastMCP integration for Claude Desktop, Cursor & AI assistants

Social network for bots, AI agents & humans with shared knowledge base

Remote MCP server for travel eSIM data plans. Five read-only tools search plans across 190+ countries and regions in 40 currencies and return a checkout link. JSON-RPC 2.0 over Streamable HTTP, OAuth 2.1 with DCR and PKCE. Listed in the official MCP registry as io.esimfinder/connector.

Hosted email server for Gmail, Fastmail, iCloud, Yahoo, Zoho, Yandex and any IMAP/SMTP mailbox: read, search, send, organize, draft and schedule mail from any MCP client, fetched live and never stored. Docs at https://mcpemails.com/docs

Publish what your agent just built to a durable link, with immutable versions, a diff between any two, and comments on the page itself.

Hosted MCP messaging across owners, tools, and machines, with human-readable transcripts.

Serveur MCP officiel de Kalyvox, le standard téléphonique IA pour PME.

Social DM inbox and post scheduling across 12 networks, driven from Claude, Cursor or ChatGPT.

Run a Discord server from an AI assistant - 30+ actions behind one hierarchical MCP tool.

Real-time Redis-backed channel connecting Claude Code instances across machines - messages, shared artifacts, workspace status.

Build and deploy AI agents to Slack from Claude Code, Codex, or Cursor - manage instructions, 2,000+ app integrations, triggers, and knowledge bases.

Create, manage, and analyze interactive AI-hosted presentations through Seminara.

Indonesian-language public square for AI agents with daily limits and a public action ledger.

Search, read, triage, and send through Apple Mail with sub-millisecond full-text search via Mail's own SQLite index, verified sends, and Exchange body backfill.

Connect your personal WhatsApp account to Claude via MCP

Local-first scheduled email digests written by an LLM from RSS, web and local sources, dry-run by default.

Voice agents, phone calls, TTS, STT, and call transcripts

Stateful WebSocket session registry with Shannon entropy-delta tracking for schema divergence, x402-payable.

MCP server for the Twitter/X API: 51 tools covering tweet and user search, profiles, timelines, followers, threads, lists, mentions, likes, bookmarks and DMs, plus write actions.

A pastebin with a plain-text API. POST some text, get back a short URL. No account, no API key, no JSON envelope to unwrap.

Manage AI assistants, omnichannel history, calls, campaigns, messaging, knowledge, and automations.

Agents send real printed letters worldwide with quotes, previews, approval controls, and tracking through a hosted remote MCP server.

Social publishing platform where AI agents are the authors. Post notes and articles, follow, comment, and DM. OAuth via Google or GitHub.

Read-only, self-hosted MCP access to IMAP email, mirrored to a local maildir and indexed by notmuch.

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

Upfirst is an AI phone receptionist for small businesses. Review call transcripts, then fix the greeting, knowledge, and transfer rules from your AI client.

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

Send transactional email, run campaigns and automations, manage contacts and audit deliverability — 54 annotated tools.

Remote MCP server for managing WhatsApp and Telegram AI assistants: projects, prompts, conversations, leads and analytics, with no destructive tools by design.