Popular MCP Servers

MCP server that gives an agent its own email inbox: it opens the inbox, waits for the one-time code a signup sends, and reads or sends mail. Addresses are permanent, so a test suite does not need a new one per run; only the messages expire, on a retention window you set.

Enables AI agents to submit and triage leads via email, check endpoint health, and generate production-ready form code across multiple frameworks without requiring API keys.

Email validation MCP server using MailboxValidator API to determine validity of an email address.

Connects AI assistants to BillionVerify email verification via the Model Context Protocol, supporting single and batch email verification, account balance checks, and webhook management.

Email validation and SMTP verification for Claude Desktop, Cursor, and Claude Code

Sendmux is an email inbox API and email API for AI agents. Use this MCP server to let authorised agents work with Sendmux mailboxes, inbound email, clean JSON parsing, webhooks, outbound sending, provider routing, logs, billing, and team controls.

Enables AI agents to send emails and manage sending domains, templates, analytics, and content checks through the SendByte platform using the Model Context Protocol.

Real email and SMS for AI agents. Run a local mail server with disposable inboxes — agents send and receive real email, fetch verification codes, and drive a real inbox without going through any third-party email API.

Enables AI agents to send, receive, and reply to email through dedicated thread-aware mailboxes, with sandbox testing and compatibility across MCP clients.

Agent email with recipient allowlist and consent before send. For personal and small-team OpenClaw/Hermes operators. Free to try; Starter $9.99 in-app. Not for cold-outbound fleets. Not an official OpenClaw endorsement.

An MCP server that provides an email operating system for AI agents, enabling inbox triage and reply drafting while enforcing un-bypassable safety constraints on sensitive actions like money transfers and banking changes.

Enables any MCP-compatible AI agent to send WhatsApp messages, SMS, OTP codes, and email through a single REST API.

Give Claude (or any MCP client) a real email inbox and SMS. Your AI agent can read and send email, manage inboxes, track delivery, and handle SMS.

An MCP server that enables AI assistants to interact with the VoIPbin CPaaS platform, exposing tools for managing calls, flows, messaging, conferencing, and more.

Enables AI assistants to read, search, triage, and manage one.com mailboxes over IMAP/SMTP, including sending, replying, forwarding, and organizing emails via natural language.

Enables an assistant to send email and list sent emails through the Maillog email API.

Enables AI agents to send and manage email, read threaded replies, run campaigns and automations, and handle approvals through the Model Context Protocol from any compatible client.

An MCP server that provides AI agents with direct access to authoritative Cakemail API specifications, enabling accurate code generation and eliminating hallucination.

Enables AI assistants to read, organize, and send Proton Mail through the local Proton Bridge, with careful gating for sending and attachment access.

通过IMAP和SMTP协议实现邮箱读写操作，支持腾讯企业邮箱，可收发邮件、管理文件夹和搜索邮件。