Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.
Connect Runs on your machine
claude mcp add mailsink -e MAILSINK_API_KEY=<MAILSINK_API_KEY> -e MAILSINK_API_URL=<MAILSINK_API_URL> -- npx -y @mailsink/[email protected]{
"mcpServers": {
"mailsink": {
"command": "npx",
"args": [
"-y",
"@mailsink/[email protected]"
],
"env": {
"MAILSINK_API_KEY": "<MAILSINK_API_KEY>",
"MAILSINK_API_URL": "<MAILSINK_API_URL>"
}
}
}
}{
"mcpServers": {
"mailsink": {
"command": "npx",
"args": [
"-y",
"@mailsink/[email protected]"
],
"env": {
"MAILSINK_API_KEY": "<MAILSINK_API_KEY>",
"MAILSINK_API_URL": "<MAILSINK_API_URL>"
}
}
}
}{
"servers": {
"mailsink": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@mailsink/[email protected]"
],
"env": {
"MAILSINK_API_KEY": "<MAILSINK_API_KEY>",
"MAILSINK_API_URL": "<MAILSINK_API_URL>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
MAILSINK_API_KEYRequired, secret | Your MailSink API key. Get it at https://mailsink.dev/auth/github |
MAILSINK_API_URLOptional | Optional API base URL override (defaults to https://api.mailsink.dev) |
Details
| Package | @mailsink/[email protected] (NPM, stdio) |
| First published | 21 Aug 2026 |
| Last updated | 21 Aug 2026 |
| Registry name | io.github.heocoi/mailsink |
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