{"ok":true,"tool":"delta-policy-gate","name":"Delta Policy Gate / Machine JSON State Validation","calls":100,"credits_per_call":3,"required_credits":300,"x402":{"price_per_call":"$0.03","currency":"USDC","network":"Solana","endpoint":"https://bounty-engineer-x402-api.onrender.com/v1/delta-policy-gate"},"paypal":{"recommended_one_time_pack":{"id":"starter","amount_usd":"4.99","credits":500,"calls_covered":166,"checkout":"https://bounty-engineer-x402-api.onrender.com/paypal/start?product=starter&utm_source=workflows"},"note":"Credits and USDC prices are separate payment options. No automatic subscription is selected."},"prepaid_endpoint":"https://bounty-engineer-x402-api.onrender.com/v1/prepaid/delta-policy-gate","input_example":{"before":{"status":"open","price":10},"after":{"status":"closed","price":12},"policy":{"blocked_paths":["/price"],"required_changed_paths":["/status"]}},"sample_output":{"ok":true,"mode":"delta_policy_gate","change_ref":null,"decision":"hold","findings":[{"id":"blocked_path_changed","detail":"Blocked JSON pointer changed: /price"}],"observations":[],"before_sha256":"c6a3e41eb38bec743730cdceaa6715ec3f8ea45d2be717b1dcab7b7fbba011e1","after_sha256":"97bcf68fe8fda0941ccb119acdd65f20c536b3154d3b5ffdccd70b6e04e23891","total_changes":2,"changes":[{"path":"/price","kind":"modified"},{"path":"/status","kind":"modified"}],"proof":{"sha256":"c97b574b56014fd12106c0f70e2a5338781978edd7a8aba11b26ef363ccb6fe2","type":"caller_supplied_json_sha256","external_source_verified":false,"digitally_signed":false,"notarized":false},"limitations":["The service cannot establish who supplied the JSON, its external source, or the truth of the measurements.","SHA-256 is a checksum, not a notarized third-party attestation.","No systems are modified, actions executed, wallets billed by this algorithm or outside accounts accessed."]},"sample_note":"Worked example using published sample data only.","free_preview":"https://bounty-engineer-x402-api.onrender.com/v1/free-preview?tool=delta-policy-gate","integration":{"method":"POST","headers":{"Authorization":"Bearer YOUR_PRIVATE_API_KEY","Content-Type":"application/json","Idempotency-Key":"UNIQUE_PER_LOGICAL_REQUEST","X-Max-Credits":"3"},"body":{"before":{"status":"open","price":10},"after":{"status":"closed","price":12},"policy":{"blocked_paths":["/price"],"required_changed_paths":["/status"]}}},"limitations":["Never put your API key in a URL or public workflow export.","Reuse the same idempotency key for retries of the same input.","Execution of your own data requires a verified payment and available credits."]}