Currently, x402 still needs a middleware that can handle retries and full-link logging from the infra perspective, built outside the business layer, minimizing intrusion and enhancing system robustness. This type of middleware is the easiest to build and the most needed. I believe using Cloudflare Workers should easily accomplish this middleware. The general functions are as follows: After a payment succeeds or fails, it is responsible for automatically replaying requests to ensure a final 2xx response. For example, while the client sees it as a single request, the middleware will ensure through multiple calls to prevent the request from being lost due to server issues after a failure. Provide a period of data caching, for instance, when a payment is successful and the server returns data successfully, but the client fails to receive it or refreshes, it can return the cached data again. At the same time, log each step's events and durations into a unified log for calculating success rates and performing anomaly analysis. Provide failure fallback and refund functionality, triggering automatic refunds when a request fails but the payment succeeds. Additionally, an API Hub can be built to allow pre-charging or a one-time payment to exchange for a period of unverified process requests, providing high-speed APIs.