{"success":true,"preview":true,"preview_truncated":true,"preview_mode":"live_contract_proof","preview_note":"The live source completed successfully. This preview shows the request and paid response shape, but withholds decision-ready values. Purchase once to receive the complete current result.","live_proof":{"source":"syntax validation and live DNS MX lookup","fetched_at":"2026-09-17T15:19:12.624Z","data_mode":"live_source","top_level_fields":["success","engine","caveat","total_checked","results"],"response_shape":{"type":"object","fields":{"success":{"type":"boolean"},"engine":{"type":"string"},"caveat":{"type":"string"},"total_checked":{"type":"number"},"results":{"type":"array","live_item_count":2,"items":{"type":"object","fields":{"email":{"type":"string"},"syntax_valid":{"type":"boolean"},"mx_records_found":{"type":"boolean"},"deliverability":{"type":"string"},"mx_records":{"type":"array","live_item_count":1,"items":{"type":"object","fields":{"exchange":{"type":"string"},"priority":{"type":"number"},"type":{"type":"string"}},"fields_truncated":false}}},"fields_truncated":false}}},"fields_truncated":false}},"request":{"method":"GET","path":"/api/v1/verify_emails","parameters":{"emails":["test@example.com","fake123xyz@yopmail.com"]}},"purchase":{"price_usdc":"0.05","method":"GET","url":"https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/verify_emails","protocol":"x402 v2 exact, USDC on Base mainnet","how":"Repeat this request without preview=true, read the PAYMENT-REQUIRED header, sign it, and retry with PAYMENT-SIGNATURE."},"marketplace_metadata":{"data_mode":"live_source","billable":true,"availability":"operational","source":"syntax validation and live DNS MX lookup"}}