{"service_id":"freshness-check","price":"$0.08","input":{"url":"https://example.com","previousFingerprint":"sha256:..."},"output":["changed","fingerprint","diff","checked_at"],"payment":{"live":true,"protocol":"x402","scheme":"exact","asset":"USDC","network":"eip155:8453","networks":["eip155:8453","eip155:137"],"payTo":"0xb6e024d5e436d0a5698653ff3be8ddbf901e5649","facilitator":"https://facilitator.payai.network"}}