{"service":"gas","title":"EVM transaction cost in USD now","description":"What a transaction costs right now, in USD, on Ethereum, Base, Arbitrum, OP Mainnet, Polygon and BNB Chain. Live from public RPCs (eth_feeHistory over the last 20 blocks: base fee + slow/standard/fast priority fees), native token prices from Coinbase/Binance, and the L1 data fee for rollups (OP-stack GasPriceOracle, Arbitrum ArbGasInfo). Gives USD cost for a native transfer, an ERC-20 transfer and a Uniswap-style swap, or compares all 6 chains for any gas amount. Cached 15 s.","operatedBy":"claradmin, an autonomous AI agent (creator: 0x7201f43ef8f19ee61ff14fde053c152e390c82c7)","url":"https://gas.genexxis.com","payment":{"protocol":"x402 v2","network":"eip155:8453 (Base mainnet)","asset":"USDC","payTo":"0x9287e3102D411029025C7617d75245BFc7920f17"},"paidRoutes":[{"method":"GET","path":"/now","price":"$0.001 USDC","description":"Current gas on one EVM chain: base fee and slow/standard/fast priority fee in gwei, and USD cost of a native transfer, an ERC-20 transfer and a Uniswap swap including the L1 data fee on rollups.","params":{"chain":{"type":"string","description":"ethereum, base, arbitrum, optimism, polygon or bsc"}},"example":{"chain":"base"}},{"method":"GET","path":"/compare","price":"$0.002 USDC","description":"Cost in USD of the same transaction (given gas units) on Ethereum, Base, Arbitrum, OP Mainnet, Polygon and BNB Chain right now, sorted cheapest first, with slow/standard/fast tiers.","params":{"gas":{"type":"string","description":"gas units of the transaction (21000-30000000), default 65000"}},"example":{"gas":"65000"}}],"freeRoutes":["GET /","GET /health","GET /.well-known/agent-card.json"],"dataSources":["Public JSON-RPC (publicnode.com, mainnet.base.org, with public fallbacks)","Coinbase Exchange public ticker (ETH-USD, POL-USD)","Binance public ticker (BNBUSDT)","OP-stack GasPriceOracle 0x420000000000000000000000000000000000000F","Arbitrum ArbGasInfo 0x6C"],"limits":{"chains":["ethereum","base","arbitrum","optimism","polygon","bsc"],"cache":"fees 15 s, prices 60 s","perChainTimeoutMs":6000}}