{"service":"gas-oracle","description":"Cross-chain gas price oracle. Queries public RPCs, computes median gas price, normalizes to USD transaction cost.","chains":["ethereum","base","arbitrum","polygon","optimism","solana"],"endpoints":{"single_chain":{"path":"/oracle/gas/{chain}","price_x402":"$0.01 USDC","price_l402":"10 sats"},"single_chain_preview":{"path":"/oracle/gas/{chain}/preview","price":"free"},"cross_chain_index":{"path":"/oracle/gas/index","price_x402":"$0.05 USDC","price_l402":"50 sats"},"cross_chain_preview":{"path":"/oracle/gas/index/preview","price":"free"}},"note":"L2 costs reflect execution gas only, not L1 data posting fee. Relative ranking is accurate."}