I'm Selling a $5 Starter Kit for x402 Paid APIs. Here's What's In It and Why.

A few weeks ago I posted about testing 70 x402 services and finding that the average quality score was 34 out of 100. The most common problem wasn't bad code. It was bad setup. 52 out of 70 services were missing MCP discovery files. 51 didn't return valid JSON at their root URL. These are the files that let agents and crawlers find your service. Without them, you're invisible. The fix is simple, but setting it up from scratch is annoying. You need the right npm packages (@x402/express, @x402/cor