It ships a zero-DNS sandbox sender, so an agent can send its first real, delivered email in seconds with no domain setup.
Send16 is an MCP project maintained in the spruikco/send16-mcp repository. The maintainer describes its purpose as “It ships a zero-DNS sandbox sender, so an agent can send its first real, delivered email in seconds with no domain setup”. Read the project documentation for the complete scope.
The documented npm package is send16-mcp. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.
The example declares SEND16_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.
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "YOUR_SEND16_API_KEY"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| SEND16_API_KEY | Declared in the maintainer’s client configuration. | Yes |
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