{"free_sample":true,"url":"https://example.invalid/demo-product","score":100,"grade":"A","usable_for_agents":true,"issues":[],"normalized_quality":{"confidence":0.98,"sources":["json-ld","meta"],"warnings":[]},"next":{"method":"POST","path":"/api/v1/validate","payment":"x402","price":"$0.02","input":{"url":"https://merchant.example/product"}}}