原文
Just add a single line of code in your app, and you can require a USDC payment for each incoming request.
paymentMiddleware("0xYourAddress", {"/your-endpoint": "$0.01"}); // and thats it!
If a request arrives without payment, the server responds with HTTP 402, prompting the client to pay and retry.
HTTP/1.1 402 Payment Required
x402 allows any web developer to accept crypto payments without the complexity of having to interact with the blockchain.