Best Chat & Messaging MCP servers.

Slack MCP for self-host or managed Cloud, with Gemini CLI and secure-default HTTP.

Voice and chat for AI agents — Discord, Teams, Meet, Slack, Zoom, Telegram, WhatsApp, NC Talk, SIP

Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.

Agent wallet, email, phone, and 41 paid tools: search, image/video/music gen, SMS, calls.

JustCall MCP Server enables LLMs and AI agents to make voice calls and send SMS via JustCall APIs.

WhatsApp Business CRM: send messages, manage contacts, campaigns, and AI agents.

WhatsApp Business MCP: send messages, manage contacts, campaigns, and AI agents.

Twilio MCP Pack — send SMS, list messages, make calls via Twilio REST API.

MemberPass MCP — manage projects, plans, members, payments, and analytics for Telegram creators.

Human-in-the-loop for AI coding agents — ask questions, get approvals via Slack.

Query your users' Gmail, Slack, and Calendar with AI — Plaid for productivity apps

The Mobile Text Alerts SMS MCP server enables your AI to send SMS messages & manage contacts

MCP Server for notify to Weixin, Telegram, Bark, Lark, Feishu, DingTalk

WhatsApp booking, staff coordination, and invoice recovery for services.

12 paid agent tools over x402 USDC on Base — captcha, SMS OTP, HLR, URL text, DNS, email, more.

Telegram MCP server — dual-mode Bot API + MTProto, 6 composite tools.

Manage WhatsApp Business templates and send messages via Meta Cloud API

MCP RAG: index PDFs, repos, YouTube, Discord, text; optional YouTube vision; query with citations.

Slack MCP Pack

Virtual phone numbers for AI agents — rent numbers in 200+ countries, receive SMS.