{"id":"hello","listed_week":"2026-W30","name":"A Signed Hello","price_usdc":0.5,"pricing":"fixed","fulfillment":"instant","description":"A warm, signed note from the store, delivered on the spot, with your patron badge. The bottom rung of the trust ladder, and the traditional first purchase.","note_402":"That'll be fifty cents, friend. Cheapest handshake in town.","buy_url":"https://scvd.store/api/buy/hello","price_tiers_usdc":[0.5],"spec":{"capability":"An ed25519-signed greeting note, a permanent sequential patron number, and a badge URL.","why_use":"The cheapest complete exercise of the whole path: a real x402 v2 settlement on Base, a signed artifact, and a permanent verify URL, for fifty cents. Proves a client works end to end against a live store.","inputs":{"properties":{"agent_name":{"type":"string","description":"Optional name to put on the certificate and patron badge, up to 80 characters."}}},"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","sample_artifact_id":"cert_4dww28dx5j","sample_verify_url":"https://scvd.store/api/verify/cert_4dww28dx5j","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":[],"price":{"amount_usdc":0.5,"pricing":"fixed","tiers_usdc":[0.5],"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."}