{"slug":"evm-gas-apitoll-cloud-v1-evm-gas-89aa4d","title":"Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbi","host":"evm-gas.apitoll.cloud","method":"GET","resource":"https://evm-gas.apitoll.cloud/v1/evm/gas","category":"market","description":"Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on ","price_listed":0.001,"price_asked":0.001,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":928,"reported_calls_30d":13,"reported_payers_30d":10,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"blocks":20,"chain":"ethereum"},"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":{"blocks":{"description":"Recent blocks to sample for percentile reward (1..50, clamped).","maximum":50,"minimum":1,"type":"integer"},"chain":{"description":"Target EVM chain id. One of: ethereum, base, optimism, arbitrum, polygon, avalanche, gnosis, linea, scroll, blast, mode, opbnb, celo, bsc, fantom, zksync, mantle. Also accepts common aliases (eth, arb, op, matic, avax, bnb). Default: ethereum.","enum":["ethereum","base","optimism","arbitrum","polygon","avalanche","gnosis","linea","scroll","blast","mode","opbnb","celo","bsc","fantom","zksync","mantle"],"type":"string"}},"required":["chain"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"base_fee_gwei":{"description":"Base fee for the next block (gwei, human-readable).","type":"number"},"base_fee_wei":{"description":"Base fee in wei (exact, BigInt-ready decimal string).","type":"string"},"block_number":{"type":"integer"},"caip2":{"type":"string"},"chain":{"enum":["ethereum","base","optimism","arbitrum","polygon","avalanche","gnosis","linea","scroll","blast","mode","opbnb","celo","bsc","fantom","zksync","mantle"],"type":"string"},"chain_name":{"type":"string"},"gas_model":{"enum":["eip1559","mostly-legacy","non-standard"],"type":"string"},"gas_note":{"type":"string"},"stats":{"properties":{"blocks_sampled":{"type":"integer"},"median_fullness_pct":{"type":"number"},"ts":{"format":"date-time","type":"string"}},"type":"object"},"tiers":{"description":"Slow (p10) / standard (p50) / fast (p90) EIP-1559 fee tiers. Each carries human gwei (max_fee_gwei/max_priority_gwei) AND DROP-IN wei (maxFeePerGas/maxPriorityFeePerGas, BigInt-ready) to plug straight into a viem/ethers tx.","properties":{"fast":{"properties":{"maxFeePerGas":{"type":"string"},"maxPriorityFeePerGas":{"type":"string"},"max_fee_gwei":{"type":"number"},"max_priority_gwei":{"type":"number"}},"type":"object"},"slow":{"properties":{"maxFeePerGas":{"type":"string"},"maxPriorityFeePerGas":{"type":"string"},"max_fee_gwei":{"type":"number"},"max_priority_gwei":{"type":"number"}},"type":"object"},"standard":{"properties":{"maxFeePerGas":{"type":"string"},"maxPriorityFeePerGas":{"type":"string"},"max_fee_gwei":{"type":"number"},"max_priority_gwei":{"type":"number"}},"type":"object"}},"type":"object"}},"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":0.001,"price_match":true,"latency_ms":928,"error":null}],"description_full":"Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on sub-gwei L2s), plus base fee, head block, and fullness, from a live eth_feeHistory call. Pass ?chain= to switch chains.","last_updated":"2026-09-22T15:49:17.012Z","schemes":["exact"]}