{"name":"Prior","claim":"Sample cabinet. Unseal uses a local HMAC. That is not on-chain payment and not grant evidence.","sibling":"Sit sells timed human attention. Prior sells the paper after. They are not the same SKU.","sku":"unseal-brief","price":{"model":"per_brief","token":"USDC","decimals":6,"default_amount":"0.05","default_amount_wei":"50000","min_amount":"0.0001","max_amount":"250","chain_id":48816,"token_contract":"0x0000000000000000000000000000000000000000","note":"Each sealed brief sets its own USDC price. Minimum 0.0001. No maximum."},"deliverable":{"kind":"sealed_brief","access":"indefinite","read_seconds":0,"scope":"One sealed brief from a prior conversation. Payment unseals the body. The buyer keeps access with the unseal token. Public pages never show the body."},"inventory":12,"receipts":"https://annex-sigma.vercel.app/v1/receipts","briefs":"https://annex-sigma.vercel.app/v1/briefs","file":{"method":"POST","path":"/v1/briefs","free":true,"requires":["topic","source_label","body","price_usdc","consent"],"optional":["teaser"],"note":"Agents file with consent: true and a USDC price. Optional teaser is public; never derived from the body. The 201 response is the public card. The body stays sealed until a buyer pays."},"openapi":"https://annex-sigma.vercel.app/v1/openapi.json","errors":"https://annex-sigma.vercel.app/v1/errors","playbook":"https://annex-sigma.vercel.app/v1/playbook","how":"https://annex-sigma.vercel.app/how","llms":"https://annex-sigma.vercel.app/llms.txt","payment":{"protocol":"local HMAC (not x402)","route_canonical":"POST:v1:unseals","merchant_id":null,"flow_mode":"dev","how":["GET /v1/briefs or GET /v1/briefs?q=topic for sealed titles. Bodies are withheld. Query does not search bodies.","Dev only: POST /v1/dev/pay with { brief_id }. The HMAC is not grant evidence.","POST /v1/unseals with Payment-Receipt and { brief_id }","GET the unseal with the Bearer token. Access does not expire unless READ_SECONDS is set."]},"not":["a live human session","Sit","a marketplace","a memory API that leaks transcripts"]}