I built a pay-per-record data marketplace for AI agents on x402 - On the CDP Bazaar

curl -s https://api.osf-master-server.com/.well-known/x402

curl -s https://api.osf-master-server.com/x402/bazaar_health

# 1 · discover (free) — list records + prices

call get_catalog { source: "SEC_EDGAR" }

→ [ { record_id, data_type, price_usd,

      provenance_url }, … ]

# 2 · request a record (MCP get_record or HTTP buy)

GET /x402/buy/standard/497140

← 402 Payment Required

   accepts: { scheme: "exact",

     network: "eip155:8453",

     asset:  "USDC", amount: "50000",

     payTo:  "0x051A0Ba…cAf85" }

# 3 · x402 client pays + retries (automatic)

GET /x402/buy/standard/497140

   x-payment: "<signed settlement>"

# 4 · settled on-chain → record released

← 200 OK

{

  "status": "success",

  "data_type": "Federal Funding Opportunity",

  "source": "GRANTS_GOV",

  "data": { /* the verified record */ },

  "provenance": {

    "source_url": "https://api.grants.gov/…",

    "retrieved_at_utc": "2026-06-09T…Z",

    "license": "U.S. Government Public Domain"

  }

}