Updated September 4, 2026
MCP Enabled Email Providers
Every verified email MCP server in one place: hosted agent inboxes, official vendor servers, email marketing platforms, and community servers, so your AI agent can read, search, and send email natively.
The quick answer
If you want an agent in your email today, your shortest paths are:
- Hosted agent inboxes: AgentMail, DevInbox, and Mailerati run the mailbox for you and hand your agent a URL. The default starting point for new agent workflows.
- Resend: the only transactional email provider with an official MCP server, for agents that send.
- Microsoft 365 / Outlook: the only major inbox provider with an official, first-party MCP server.
- Email marketing platforms: Brevo, Customer.io, Kit, Mailgun, MailerLite, and ActiveCampaign all ship official MCP servers.
- Gmail, Fastmail, Proton, and most other providers: no official server. Move the agent to a hosted inbox, or use a community MCP server to connect an existing mailbox.
Official MCP servers from email vendors
First-party servers are built and maintained by the vendor. They use official APIs, support OAuth where the provider offers it, and are the safest default when one exists for your stack.
Microsoft 365 Agents MCP
Microsoft's catalog of official MCP servers includes Microsoft 365 integration through Microsoft Graph. An agent connected to it can read and send Outlook mail, search the mailbox, and work with calendar and contacts alongside email. If your email lives in Microsoft 365, this is the most production-grade option on this page.
Resend: transactional email
Resend ships the official MCP server for sending email and interacting with your Resend account: send transactional messages, manage audiences, and trigger broadcasts. It is the reference example of a send-only email MCP server. The agent can deliver mail but never touch your personal inbox, which makes it the lowest-risk way to let an agent send on your behalf.
Twilio (SendGrid): full API surface
Twilio Labs exposes all of Twilio's APIs as MCP tools, which includes SendGrid's transactional email endpoints. It's generated from OpenAPI specs rather than hand-curated for email, so the tool surface is broad: expect your agent to see many non-email tools alongside the SendGrid ones.
What about Gmail? As of September 2026 there is no verified first-party Gmail MCP server from Google. Move the agent to a hosted agent inbox below, or use a community MCP server to connect an existing Gmail mailbox.
Hosted agent inboxes
Email as a service for agents: these providers run the mailbox for you and expose it over MCP at a URL. You point your agent at the endpoint with an API key, and the service handles the mailbox, deliverability, and safety rails. For new agent workflows, this is the default worth starting from.
| Service | MCP connection | Notes |
|---|---|---|
| AgentMail | Hosted endpoint (OAuth or API key), or npx agentmail-mcp | Inbox API built for agents: create inboxes, send, reply, forward, search, label. Webhooks for inbound mail. Free tier: 3 inboxes, 3,000 emails/month. |
| DevInbox | Hosted endpoint, Bearer API key | create_inbox, wait_for_email, send_email, plus deterministic {{variable}} extraction templates. Free tier: 3 inboxes, 1,000 emails/month. |
| Mailerati | Hosted endpoint | Agent-Only email provider. Personal & Business. get_status, read_email, reply_to_email, draft_new_email (drafts held for your review), ask_user_question. Free + paid plans. |
| Mailtrap | Official MCP server | Drives its email testing sandbox: captures outbound mail for inspection so you can test what your agent sends. |
How to choose: AgentMail and DevInbox provision programmatic inboxes on demand, which suits agents that create addresses, receive verification mail, and reply as part of a workflow. Mailerati is an agent-only email provider for personal and business use, with drafts held for your review before anything sends. Mailtrap catches outbound mail in a sandbox for testing before it reaches a real customer.
Email marketing providers with MCP access
Most major email marketing platforms now ship official MCP servers. An agent connected to one can pull campaign metrics, build segments from real customer data, manage contacts, and draft sends from inside the conversation.
| Provider | MCP connection | Notes |
|---|---|---|
| Brevo | Official hosted endpoint | Campaign performance insights, adding contacts, and sales pipeline queries in natural language. Runs on your existing plan. |
| Customer.io | Official hosted endpoint | Builds segments from real attributes and behavior, inspects customer profiles, and searches the workspace. |
| Kit | Official hosted endpoint | Answers email-marketing questions and takes action in your Kit account in-conversation. |
| Mailgun | Official local server: npx @mailgun/mcp-server | 50+ operations: sending, domains, analytics, templates, suppressions, mailing lists. API key passed as an env var, never exposed to the model. |
| MailerLite | Official hosted endpoint | Connects Claude, Cursor, and VS Code to your MailerLite account. Free to set up. |
| ActiveCampaign | Official hosted endpoint (URL from Settings → Developer) | Connect from your AI client's server list and approve the connection. |
| Mailchimp | Official for Transactional (Mandrill) only | Send and diagnostics for transactional mail. The marketing platform (campaigns, audiences) is covered by community servers. |
Community email MCP servers
Open-source MCP servers built by the community to connect agents to existing mailboxes: Gmail, Fastmail, Proton Mail, Thunderbird, Apple Mail, and self-hosted. They're the fallback when your mail has to stay in an existing account, and they're maintained by volunteers: check recent commit activity before trusting one with credentials.
| Server | Works with | Notes |
|---|---|---|
| mcp-email-server | Gmail, Fastmail, Proton, most providers | Full-featured, multi-account. The default pick for Gmail and most providers. |
| thunderbird-mcp | Thunderbird local mail | Email, contacts, and calendar from a running Thunderbird instance. |
| saasmail | Self-hosted | Email server for SaaS teams on Cloudflare Workers with WebMCP support. |
| apple-mail-mcp | Apple Mail (macOS) | Read, search, and send through your local Apple Mail library. |
| jmap-mcp | Fastmail and other JMAP providers | Connects agents to JMAP mailboxes. |
| fastmail-mcp | Fastmail | Unofficial Fastmail server: email, contacts, calendar. |
| email-mcp | Gmail, Fastmail, Proton, most providers | Read, search, send, manage: a solid single-account alternative. |
Connecting an email MCP server
Every MCP-compatible agent (Claude, ChatGPT, Cursor, Copilot, or your own) takes a server config. Three real examples:
Hosted inbox (remote URL, nothing to install)
{
"mcpServers": {
"mailerati": {
"url": "https://mcp.mailerati.com",
"headers": { "Authorization": "Bearer YOUR_API_KEY" }
}
}
}
Resend (official, send-only)
{
"mcpServers": {
"resend": {
"command": "npx",
"args": ["-y", "resend-mcp"],
"env": { "RESEND_API_KEY": "re_xxx" }
}
}
}
Mailgun (official, runs locally)
{
"mcpServers": {
"mailgun": {
"command": "npx",
"args": ["-y", "@mailgun/mcp-server"],
"env": { "MAILGUN_API_KEY": "your-key", "MAILGUN_API_REGION": "us" }
}
}
}
Safety checklist
- Prefer OAuth-scoped official servers where they exist: scoped tokens beat raw passwords.
- Send-only for transactional work. A server that can only send (like Resend's) can't leak your inbox.
- Draft-then-review. For anything customer-facing, keep a human in the send path.
- Audit the server before handing over credentials: open source, recent commits, and a maintainer you can name.
FAQ
- What is an MCP-enabled email provider?
- One that exposes email (reading, searching, sending, replying) through an MCP server, so any MCP-compatible AI agent can work with it natively instead of through custom API code.
- Does Gmail have an official MCP server?
- No verified first-party server exists as of September 2026. Move the agent to a hosted inbox, or use a community MCP server to connect an existing mailbox.
- What is a hosted agent inbox?
- A service that runs mailboxes for agents and exposes them over MCP at a URL. Your agent connects with an API key instead of credentials for your personal account. AgentMail and DevInbox provision inboxes on demand; Mailerati runs a single reviewed mailbox.
- How do I connect an email MCP server to my agent?
- Add the server to your agent's MCP config with its command or URL and credentials. See the setup section above for copy-paste examples.
- Is it safe to give an AI agent access to my email?
- Treat the server like a mailbox credential: prefer OAuth, prefer send-only servers for transactional work, and keep a human approving outbound drafts.
- What's the difference between official and community servers?
- Official servers are maintained by the vendor (Microsoft, Resend, Twilio). Community servers are volunteer-built, connect agents to existing mailboxes, and work across many providers.
- Which email marketing platforms have MCP servers?
- Brevo, Customer.io, Kit, Mailgun, MailerLite, and ActiveCampaign all ship official MCP servers. Mailchimp has an official server for its Transactional (Mandrill) product; the marketing platform itself is covered by community servers.