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X402mail - Email API with crypto micropayments

@MuzsaiLajos

Repository

About X402mail - Email API with crypto micropayments

Python SDK for x402mail - send and receive email with USDC micropayments

#email#mcp#crypto#x402#usdc#ai-agents#communication

Basic information

Category

Developer Tools

License

MIT

Runtime

python

Transports

stdio

Publisher

MuzsaiLajos

Submitted by

Lajos Muzsai

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "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"
      }
    }
  }
}

Tools

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Overview

What is X402mail - Email API with crypto micropayments?

X402mail is an email API that lets you send and receive emails with crypto micropayments. It requires no accounts or API keys—just a wallet. Built on the x402 protocol, every API call is paid with USDC on Base.

How to use X402mail - Email API with crypto micropayments?

Install the package with pip install x402mail[cdp] (or pip install x402mail for private key usage). Set environment variables for your CDP wallet or provide an EVM private key. Use the Python API to send/receive emails, or run a local MCP server with x402mail mcp for AI agent integration.

Key features of X402mail - Email API with crypto micropayments

  • No accounts or API keys required
  • Pay per API call with USDC on Base
  • Simple Python API (send, inbox, list, read)
  • Built-in MCP server for AI agents
  • Supports CDP server wallets or any EVM wallet

Use cases of X402mail - Email API with crypto micropayments

  • AI agents sending and receiving emails autonomously
  • Automated email notifications with crypto-based billing
  • Secure, account-free email communication for dApps

FAQ from X402mail - Email API with crypto micropayments

How does payment work?

Each API call is paid with USDC on Base. Costs are fixed per action (e.g., send email: $0.005, list messages: $0.002). $1 USDC covers approximately 200 emails.

What wallets are supported?

The recommended setup is a Coinbase Developer Platform (CDP) Server Wallet, which requires CDP API keys. You can also use any EVM wallet with USDC on Base by providing a private key.

Do I need an API key?

No. X402mail does not require traditional API keys. For CDP wallet usage, you need CDP API credentials (key ID, secret, wallet secret). For private key usage, you only need an EVM private key.

How much does it cost per action?

Send email: $0.005, check inbox: $0.001, list messages: $0.002, read message: $0.001. All costs are fixed in USDC on Base.

Is there an MCP server for AI agents?

Yes. Run x402mail mcp to start a local MCP server. It provides tools like send_email, get_inbox, list_messages, and read_message. Configure it in your MCP client (e.g., Claude Desktop, Cursor) using the provided JSON block.

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