{"capability":"history-facts","providers":[{"endpoint":"https://x402-app.railhead.network/x402/history-facts","address":"0x0bEfB4060d30356Cf405D97E155292EA429AB4D9","price_usdc":0.1,"capability":"history-facts","description":"History Fact of the day","pricing":"fixed","challenge_audit":{"status":"ok","checked_at":1790825511.6771955}}]}