Send and receive emails with crypto micropayments. No accounts, no API keys - just a wallet.
X402mail - Email API with crypto micropayments is an MCP project maintained in the muzsailajos/x402mail repository. The maintainer describes its purpose as “Send and receive emails with crypto micropayments. No accounts, no API keys - just a wallet”. Read the project documentation for the complete scope.
The project provides a local client configuration using x402mail. Follow the repository’s build and installation steps before copying it, and replace example paths with the paths on your own computer.
The example declares CDP_API_KEY_ID, CDP_API_KEY_SECRET, CDP_WALLET_SECRET. 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 |
|---|---|
| send_email | $0.005 |
| get_inbox | $0.001 |
| list_messages | $0.002 |
| read_message | $0.001 |
{
"mcpServers": {
"x402mail": {
"command": "x402mail",
"args": [
"mcp"
],
"env": {
"CDP_API_KEY_ID": "YOUR_CDP_API_KEY_ID",
"CDP_API_KEY_SECRET": "YOUR_CDP_API_KEY_SECRET",
"CDP_WALLET_SECRET": "YOUR_CDP_WALLET_SECRET"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| CDP_API_KEY_ID | Declared in the maintainer’s client configuration. | Check documentation |
| CDP_API_KEY_SECRET | Declared in the maintainer’s client configuration. | Check documentation |
| CDP_WALLET_SECRET | Declared in the maintainer’s client configuration. | Check documentation |
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