{"sample":true,"free":true,"note":"Static example of the paid response shape (not live data). Drop sample=1 and pay via x402 for live data. Failed calls (4xx/5xx) are never charged.","path":"/crypto/gas-compare","price_usdc":"0.002000","pay_url":"https://kr-x402-mvp.kgy5612.workers.dev/crypto/gas-compare?","input_schema":{"type":"object","properties":{"chains":{"type":"string","description":"Comma list subset of base,ethereum,arbitrum,optimism,polygon,bsc (default all)","examples":["base,ethereum,arbitrum"]},"gas":{"type":"integer","minimum":21000,"maximum":30000000,"description":"Optional custom gas units; result sorted by custom_usd","examples":[200000]}},"additionalProperties":false},"example":{"updated_at":"2026-10-30T01:30:00Z","sorted_by":"swap_usd","cheapest":"base","cheapest_swap_usd":0.0011,"ethereum_vs_cheapest_x":180,"recommendation":"Execute on base (~180x cheaper than Ethereum L1); ...","gas_units":{"transfer":21000,"erc20_transfer":65000,"swap":150000},"chains":[{"chain":"base","chain_id":8453,"native":"ETH","native_usd":3850.1,"gas_price_gwei":0.0019,"transfer_usd":0.000154,"erc20_transfer_usd":0.000476,"swap_usd":0.0011,"rollup_l1_fee_extra":true,"upstream":"https://base.drpc.org","latency_ms":80}]},"start_here":"https://kr-x402-mvp.kgy5612.workers.dev/crypto/ping"}