{"name":"x402joker","description":"Pay-per-joke vending machine over the x402 protocol.","endpoint":"https://www.x402joker.com/api/buy","method":"POST","protocol":"x402","body":{"theme":"optional string — joke theme, omit for surprise"},"payment":{"price":"$0.01","network":"base","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","assetSymbol":"USDC","payTo":"0x2FE28Ddb76D6147D5888B1b725B0F2237676E7E6","scheme":"exact"},"flow":["POST endpoint with no X-PAYMENT header → 402 with accepts:[paymentRequirements] in body","Sign EIP-3009 transferWithAuthorization matching the requirements; base64-encode as X-PAYMENT header","Retry POST with X-PAYMENT → 200 { joke } + on-chain settlement tx hash in X-PAYMENT-RESPONSE header"],"discovery":{"llmsTxt":"https://www.x402joker.com/llms.txt","humanReadable":"https://www.x402joker.com/"},"references":{"spec":"https://x402.org","reference":"https://github.com/coinbase/x402"}}