{"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":"live endpoint probe, Coinbase x402 Bazaar discovery, and 402index directory","fetched_at":"2026-09-30T00:38:38.206Z","data_mode":"live_source","top_level_fields":["success","source","fetched_at","target","probe","ready_for_payment","decision","reasons","payment_requirements","compatible_base_requirements","discovery","caveat"],"response_shape":{"type":"object","fields":{"success":{"type":"boolean"},"source":{"type":"string"},"fetched_at":{"type":"string"},"target":{"type":"object","fields":{"requested_url":{"type":"string"},"final_url":{"type":"string"},"method":{"type":"string"}},"fields_truncated":false},"probe":{"type":"object","fields":{"status_code":{"type":"number"},"latency_ms":{"type":"number"},"content_type":{"type":"string"},"payment_header_present":{"type":"boolean"},"x402_version":{"type":"null"}},"fields_truncated":false},"ready_for_payment":{"type":"boolean"},"decision":{"type":"string"},"reasons":{"type":"array","live_item_count":2,"items":{"type":"string"}},"payment_requirements":{"type":"array","live_item_count":0},"compatible_base_requirements":{"type":"array","live_item_count":0},"discovery":{"type":"object","fields":{"coinbase_bazaar":{"type":"object","fields":{"checked":{"type":"boolean"},"exact_match_count":{"type":"number"}},"fields_truncated":false},"index_402":{"type":"object","fields":{"checked":{"type":"boolean"},"exact_match_count":{"type":"number"},"matches":{"type":"array","live_item_count":0}},"fields_truncated":false}},"fields_truncated":false},"caveat":{"type":"string"}},"fields_truncated":false}},"request":{"method":"GET","path":"/api/v1/x402_endpoint_preflight","parameters":{"method":"GET","url":"https://example.com/api/paid"}},"purchase":{"price_usdc":"0.003","method":"GET","url":"https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/x402_endpoint_preflight","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":"live endpoint probe, Coinbase x402 Bazaar discovery, and 402index directory"}}