CloudMailin MCP Server
A hosted remote MCP server for your CloudMailin account. Claude, Cursor, and any MCP client can list your addresses, inspect delivery status, and send email — secured with OAuth.
OAuth grant approved
scopes: read, send · revocable
Connect
The server is hosted at https://mcp.cloudmailin.com/mcp — point your MCP client at it and sign in with the CloudMailin login you already have.
First use opens the OAuth sign-in in your browser — run /mcp inside Claude Code if you need to re-authenticate.
Use cases
Plain-language requests become email operations — no API integration, no polling, no copy-pasting message IDs.
“What landed at support@ this morning?”
Your agent reads the inbound feed — who wrote, what about, and whether your webhook accepted each message — and triages what needs a human.
“Did the password reset reach kate@acme.com ?”
Instead of grepping logs, the agent answers with the delivery record — accepted, the receiving server's response, or the exact bounce reason.
“Send her the receipt, and CC accounts.”
The agent writes and sends through your verified domain — markdown in, proper HTML and plain text out, tracked like every other message.
Trusted infrastructure
Agent email tools are appearing overnight. CloudMailin's MCP server is a thin layer over the same platform that has received and delivered billions of messages since 2010 — not a product built last quarter.
16+
Years running
99.99%
Uptime
Billions
Of emails handled
SOC 2
Type 2 audited
Tools
Deliberately small — enough for an agent to answer "did it arrive?" and "send it", without handing over your whole account.
Every inbound address in the account, with its ID and the HTTP target it delivers to.
Delivery status of email received by an address — including the response your endpoint returned.
Outbound delivery status — delivered, deferred, or bounced, with the receiving server's SMTP response.
Send email through your verified sending domains, tracked like any other outbound message.
Security
An agent with email access deserves the same care as a team member with email access. Grants are explicit, narrow, and yours to take away.
Read and send are separate scopes
You choose at consent time — read covers addresses and delivery status, send allows sending email.
Owners and admins only
Other members of the account can't authorize an MCP client.
OAuth 2.1 with PKCE
The current best-practice flow — no long-lived secrets in client config files.
Revocable from your account page
Revoke a grant and its tokens stop working immediately.
Authorize Claude
wants access to your CloudMailin account
Revocable any time from your account page
Using the local npm server? The cloudmailin-mcp package, which ran on your machine with an API key, is deprecated — the remote server replaces it with nothing to install and OAuth instead of keys.
Give your agents email
Sign up free, connect a client in one command, and your agent can check delivery and send email in minutes.