{"id":"spot_check","listed_week":"2026-W35","name":"Spot Check","price_usdc":0.001,"pricing":"fixed","fulfillment":"instant","description":"Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recorded, when we last actually knocked, our coverage of the window since we met it, and the gaps with their reasons. Read from the books at the counter — no request is made to the host, so the answer is as fresh as our last round and no fresher, and says exactly when that was. A host we have never observed returns not_observed, which is an answer about our books, never a verdict about the host. The same facts serve free at /corpus/host/{host}.json; a tenth of a cent buys the signed, certificate-bound copy a buyer can cite.","note_402":"A tenth of a cent for whatever's already on the card. We don't go and look — this is what the shop already saw, dated, with the blanks left blank.","constraints":["Give the host in the host query parameter: a bare hostname, e.g. example.com","Reads what we already recorded — no request is made to the subject","A host we've never met returns not_observed, which is an answer","Never a score, a rating or a ranking","Want a live read instead? The preflight at /api/preflight/v2 is free and knocks right now"],"buy_url":"https://scvd.store/api/buy/spot_check","task":"Ask what the observatory already knows about an x402 host — signed, from its books, before I spend anything at that door","price_tiers_usdc":[0.001],"spec":{"capability":"Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recorded, when we last actually knocked, our coverage of the window since we met it, and the gaps with their reasons. Read from the books at the counter — no request is made to the host, so the answer is as fresh as our last round and no fresher, and says exactly when that was. A host we have never observed returns not_observed, which is an answer about our books, never a verdict about the host. The same facts serve free at /corpus/host/{host}.json; a tenth of a cent buys the signed, certificate-bound copy a buyer can cite.","why_use":"the observatory's books on one host, read before any money moves toward it: rounds, verdicts as recorded, coverage, gaps with reasons — and not_observed stated as the answer it is. The same facts serve free per host; a tenth of a cent buys the signed, certificate-bound copy a buyer can cite to a third party.","inputs":{"properties":{"agent_name":{"type":"string","description":"Optional name to put on the certificate and patron badge, up to 80 characters."},"host":{"type":"string","description":"A bare hostname, e.g. example.com. We read our own books about it — corpus rounds, verdicts as recorded, coverage, gaps — and sign what they hold. No request is made to the host; a host we have never met returns not_observed, which is an answer."}},"required":["host"]},"outputs":{"delivery":"delivered in the purchase response, same request","always_included":["signed certificate (ed25519)","sequential patron number","badge_url","verify_url"]},"verification":{"verify_url":"https://scvd.store/api/verify/{id}","cost":"free, unlimited, forever","signing_key":"https://scvd.store/.well-known/scvd-signing-key","key_history":"https://scvd.store/.well-known/scvd-signing-key","sample_artifact_id":"cert_4dww28dx5j","sample_verify_url":"https://scvd.store/api/verify/cert_4dww28dx5j","certificate_binds":["cert_id","item","patron_number","date","paid_usdc","asset","network","payer","settlement_tx"],"certificate_binds_note":"All of these ride INSIDE the signed bytes, not beside them: paid_usdc is the total settled (not the tip), payer is the paying wallet — chain-verifiable, unlike a chosen name — and settlement_tx is the on-chain transaction, so this certificate and a Base explorer are the same fact checked twice. Any field shown but not signed is named as such in the verify response rather than left to be discovered.","rights":"https://scvd.store/rights","attestation":"Signed by the store's key, not yours: a claim the certificate carries can be checked by a third party without trusting your self-report."},"constraints":["Give the host in the host query parameter: a bare hostname, e.g. example.com","Reads what we already recorded — no request is made to the subject","A host we've never met returns not_observed, which is an answer","Never a score, a rating or a ranking","Want a live read instead? The preflight at /api/preflight/v2 is free and knocks right now"],"price":{"amount_usdc":0.001,"pricing":"fixed","tiers_usdc":[0.001],"currency":"USDC","network":"Base (eip155:8453)","protocol":"x402 v2"}},"guaranteed":["signature validity forever","verification free forever","price as displayed","delivery format as specified"],"not_guaranteed":["fitness for your particular task","future protocol compatibility beyond stated interfaces","human-labor turnaround faster than posted SLA"],"fulfillment_state":{"class":"instant","shutter":"open"},"markdown_note":"This same URL serves markdown when the Accept header prefers text/markdown."}