Verified MCP Server Directory

Email (IMAP/SMTP)

Email IMAP/SMTP MCP server: iCloud, Gmail, Yahoo, Outlook, and custom IMAP providers

Microsoft Teams API

AI-native Microsoft Teams integration — read chats, send messages, search people

Microsoft 365 Teams

Microsoft 365 Teams via Graph: list chats, read/send messages, list teams/channels, presence.

Ethereum & EVM Message Signing

Sign Ethereum messages - EIP-191, EIP-712 typed data, Permit2, signature verification and recovery

RadiusOS CRM

34-tool CRM server — contacts, pipeline, quotes, invoices, scheduling, email, and AI scoring.

Klaviyo

Klaviyo MCP Pack — wraps the Klaviyo API for email marketing

Corporate email and chat thread summarization parser.

Attrove

Search Gmail, Slack, Outlook, Google Calendar, and meetings — one MCP, one query.

CrabbitMQ

Async message queue for AI agents. Self-provision queues, push/poll messages, no signup.

Autonomous B2B lead prospecting — 36 tools for campaigns, leads, and email outreach.

Send That Email

send-that-email MCP — wraps StupidAPIs (requires X-API-Key)

Decentralized task broker and message relayer for multi-agent swarms.

ai.smithery/smithery-notion

A Notion workspace is a collaborative environment where teams can organize work, manage projects,…