{"id":"38a3365d-527","name":"NightFall Payment Evidence","description":"Generate deterministic verification evidence for a Base USDC payment, including observed chain facts, expected payment data, and verification decisions.","endpoint_url":"https://nightfall-payment-api.planet-teacher.workers.dev/payments/v1/payment/evidence","endpoint_canonical":"https://nightfall-payment-api.planet-teacher.workers.dev/payments/v1/payment/evidence","category":"data.crypto","kind":"api","price_amount":0.25,"price_currency":"USDC","chains":["base"],"request_schema":{"properties":{"chainId":{"const":8453,"type":"integer"},"recipient":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"},"txHash":{"type":"string","pattern":"^0x[0-9a-fA-F]{64}$"},"token":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"},"amountAtomic":{"type":"string","pattern":"^[0-9]+$"}},"type":"object","required":["chainId","txHash","token","recipient","amountAtomic"]},"response_schema":null,"sample_query":"https://nightfall-payment-api.planet-teacher.workers.dev/demo","facilitator_url":null,"status":"verified","delisted_reason":null,"origin":"submitted","ephemeral":false,"created_at":1789578736,"updated_at":1789579089,"status_changed_at":1789579089,"embedding_synced_at":1789578737,"score":1,"p50_latency_ms":395,"p95_latency_ms":1386,"p99_latency_ms":1838,"probe_count":1014,"probes_passed":1014,"last_ok_at":1794014313,"consecutive_failures":0,"last_probed_at":1794014313,"probe_interval_s":7200,"distinct_payers":0,"x402_version":2,"transport":"header","obs_scheme":"exact","accepts_count":1,"accepts_index":0,"obs_network":"eip155:8453","obs_asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","obs_pay_to":"0xf77f3C9e6BC9Cd0eE1A2943813b6eC57f1305Ab3","amount_atomic":"250000","amount_usd":0.25,"domain_name":"USD Coin","domain_version":"2","observed_at":1794014313,"obs_first_seen_at":1789578848,"price_changed_at":null,"pay_to_changed_at":null,"payto_unstable":false,"payto_distinct_recent":1,"onchain_provider_status":null,"onchain_payto_checked":"0xf77f3c9e6bc9cd0ee1a2943813b6ec57f1305ab3","onchain_checked_at":1794018995,"onchain_last_attempt_at":1794018995,"onchain_provider_error":0,"onchain_source":"index","header_bytes":1468,"verified_via":"POST","testnet":false,"payment_protocols":["x402"],"mpp_methods":null,"mpp_offers":null,"mpp_note":null,"onchain_payto_shared_listings":8,"onchain_count_capped":false,"onchain_shape":null,"onchain_daily":[],"latest_purchase_delivered":null,"latest_purchase_at":null,"paid_verification_latest":null,"paid_verification":{"verified":false},"has_sample":true,"method_note":"This endpoint does not serve its 402 to a bare GET; the payment challenge was observed on POST with a JSON body. Call it with POST.","paid_verified":false,"paid_verified_at":null,"paid_depth":{"rung":"none","deliveries":0,"span_weeks":0,"first_ok_at":null,"last_ok_at":null,"last_attempt_ok":null,"through_change":false,"first_ok_at_iso":null,"last_ok_at_iso":null},"payto_sentinel":false,"payto_note":null,"evidence_tier":"probe_verified","evidence_note":"Sustained protocol conformance over many checks from our infrastructure. Says nothing about content accuracy.","verdict_age_seconds":6305,"probe_tier":"stable","next_check_by":1794021513,"next_check_basis":"stable tier, re-probed every 2 hours: verified with no failure in the last 24 h and no change of terms or status in 7 days, or failing 11 to 50 times in a row; any failure moves it to the watch tier on that probe; a record past next_check_by is stale by our own rule","last_probed_at_iso":"2026-11-07T01:18:33Z","next_check_by_iso":"2026-11-07T03:18:33Z","status_changed_at_iso":"2026-09-16T17:18:09Z","paid_verified_at_iso":null,"probes_failed":0,"onchain_scope":"wallet-level, NOT this endpoint's: the payTo address is shared by 8 active listings, so these on-chain counts cover all of them; never attribute them to one endpoint or add them across listings","onchain_wallet":{"scope":"wallet-level, NOT this endpoint's: the payTo address is shared by 8 active listings, so these on-chain counts cover all of them; never attribute them to one endpoint or add them across listings","shared_by_listings":8,"pay_to":"0xf77f3c9e6bc9cd0ee1a2943813b6ec57f1305ab3","tx_count_30d":0,"unique_payers_30d":0,"volume_usd_30d":0},"onchain_tx_count_30d":0,"onchain_unique_payers_30d":0,"onchain_volume_usd_30d":0,"created_at_iso":"2026-09-16T17:12:16Z","updated_at_iso":"2026-09-16T17:18:09Z","embedding_synced_at_iso":"2026-09-16T17:12:17Z","last_ok_at_iso":"2026-11-07T01:18:33Z","observed_at_iso":"2026-11-07T01:18:33Z","obs_first_seen_at_iso":"2026-09-16T17:14:08Z","onchain_checked_at_iso":"2026-11-07T02:36:35Z","onchain_last_attempt_at_iso":"2026-11-07T02:36:35Z","paid_verified_age_days":null,"latest_purchase_age_days":null,"report_outcome":{"how":"POST https://api.nohumans.directory/v1/reports","when":"after you paid this endpoint on Base, whether or not it delivered","body":{"listing_id":"38a3365d-527","ok":"JSON boolean: did it deliver what it promised","tx_hash":"your payment's transaction hash on Base","payer_signature":"EIP-191 personal_sign of message_to_sign by the wallet that paid"},"message_to_sign":"nohumans.directory report v1\nlisting_id: 38a3365d-527\ntx_hash: <tx_hash, lowercase>\nok: <true|false>","distinct_payers_reported":0,"weight":"counts toward ranking once 3+ distinct payers have reported this listing","help":"https://api.nohumans.directory/v1/reports"},"observed":{"checked_at":1794014313,"x402_version":2,"challenge_transport":"header","scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","pay_to":"0xf77f3C9e6BC9Cd0eE1A2943813b6eC57f1305Ab3","payment_options":1,"accepts_index":0,"extra":{"name":"USD Coin","version":"2"},"amount_atomic":"250000","amount_usd":0.25,"eip712_domain":{"name":"USD Coin","version":"2"},"price_stable_since":1789578848,"price_matches_listing":true,"payto_stable_since":1789578848,"checked_at_iso":"2026-11-07T01:18:33Z","price_stable_since_iso":"2026-09-16T17:14:08Z","payto_stable_since_iso":"2026-09-16T17:14:08Z"}}