Go x402 Installation go get github.com/coinbase/x402/go Usage Accepting x402 Payments with a Gin Resource Server package main import ( "math/big" x402gin "github.com/coinbase/x402/go/pkg/gin" "github.com/gin-gonic/gin" ) func main() { r := gin.Default() r.GET( "/joke", x402gin.PaymentMiddleware( big.NewFloat(0.0001), "0x209693Bc6afc0C5328bA36FaF03C514EF312287C", x402gin.WithFacilitatorURL("https://x402.org/facilitator"), x402gin.WithResource("http://localhost:4021/joke"), ), func(c *gin.Context) { c.JSON(200, gin.H{ "joke": "Why do programmers prefer dark mode? Because light attracts bugs!", }) }, ) r.Run(":4021") // Start the server on 0.0.0.0:4021 (for windows "localhost:4021") }