Email on your own domains: add a domain, write its DNS, create mailboxes, read and send mail.
Connect Remote server
claude mcp add --transport http mail https://app.plainmail.dev/api/mcp/mcp --header "Authorization: Bearer <YOUR_API_KEY>"{
"mcpServers": {
"mail": {
"url": "https://app.plainmail.dev/api/mcp/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}{
"servers": {
"mail": {
"type": "http",
"url": "https://app.plainmail.dev/api/mcp/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}Settings > Connectors > Add custom connector
URL: https://app.plainmail.dev/api/mcp/mcpReplace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server asks for a key before it lists its tools. Connect it with your own key to see them.
Headers
| Name | Description |
|---|---|
AuthorizationOptional, secret | Optional. The server supports OAuth: connect with no key and sign in with Plainmail. Alternatively send a Plainmail API key, created at https://app.plainmail.dev/settings |
Details
| Endpoint | https://app.plainmail.dev/api/mcp/mcp (Streamable HTTP) |
| First published | 7 Nov 2026 |
| Last updated | 7 Nov 2026 |
| Registry name | dev.plainmail/mail |
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