X402mail - Email API with crypto micropayments

{
  "mcpServers": {
    "x402mail": {
      "command": "x402mail",
      "args": [
        "mcp"
      ],
      "env": {
        "CDP_API_KEY_ID": "your-key-id",
        "CDP_API_KEY_SECRET": "your-key-secret",
        "CDP_WALLET_SECRET": "your-wallet-secret"
      }
    }
  }
}