{"asset":"USDC","network":"base","chain":"eip155:8453","pay_to":"0x9eE3Cef3a4172e46Ba011Cfb1B86A4d1F3B242B9","tiers":{"spot":{"questions":6,"price":"$4","our_cost_usd":1.2,"endpoint":"POST /check/spot"},"audit":{"questions":12,"price":"$9","our_cost_usd":2.6,"endpoint":"POST /check/audit"}},"how":"POST to /check/<tier>; pay the x402 402 challenge in USDC on Base; receive the report.","inputs":{"brand":"required","url":"optional website","category":"optional (what it does + where)"},"returns":["visibility_score (0-100)","mention_rate","avg_rank","per-question breakdown","competitors winning instead","GEO fix-list"]}