{"slug":"quartermaster-surewhynot-app-v1-x402-simulate-a87454","title":"Pre-flight an x402 payment","host":"quartermaster.surewhynot.app","method":"GET","resource":"https://quartermaster.surewhynot.app/v1/x402/simulate","category":"market","description":"Pre-flight an x402 payment: decode the endpoint's challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with a payer address — verify the wallet can afford the call on Base.","price_listed":0.003,"price_asked":0.003,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":19,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"address":"0xc2a36e22ecbf353086cf83e7beea78bc28a64083","url":"https://api.example.com/paid-endpoint"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"address":{"description":"Optional payer wallet to check Base affordability","pattern":"^0x[0-9a-fA-F]{40}$","type":"string"},"url":{"description":"The x402 endpoint to pre-flight","format":"uri","type":"string"}},"required":["url"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.003,"price_match":true,"latency_ms":19,"error":null}],"description_full":"Pre-flight an x402 payment: decode the endpoint's challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with a payer address — verify the wallet can afford the call on Base.","last_updated":"2026-09-18T03:42:47.874Z","schemes":["exact"]}