Model Context Protocol server for MailSink — programmatic temporary email inboxes for AI agents and test automation.
Mailsink is an MCP project maintained in the heocoi/mailsink-mcp repository. The maintainer describes its purpose as “Model Context Protocol server for MailSink — programmatic temporary email inboxes for AI agents and test automation”. Read the project documentation for the complete scope.
The documented npm package is @mailsink/mcp. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.
The example declares MAILSINK_API_KEY. Secret-looking values have been replaced with placeholders. Required and optional labels are shown only when the documentation states them.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| create_inbox | Provision a throwaway address. Returns email, id, expires_at. |
| list_inboxes | List active inboxes on the account. |
| wait_for_email | Block up to timeout seconds (max 120) for any email to arrive. |
| get_verification_code | Extract the most recent OTP from the inbox (polls until found or timeout). |
| get_verification_link | Extract the most recent magic link. |
| list_messages | Summaries of all messages in an inbox. |
| get_message | Full content of a specific message by ID. |
| delete_inbox | Burn an inbox immediately. |
{
"mcpServers": {
"mailsink": {
"command": "npx",
"args": [
"-y",
"@mailsink/mcp"
],
"env": {
"MAILSINK_API_KEY": "YOUR_MAILSINK_API_KEY"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| MAILSINK_API_KEY | Declared in the maintainer’s client configuration. | Yes |
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