{"slug":"gateway-stride20k-com-crypto-gas-chain-1ae3dd","title":"EVM gas price API","host":"gateway.stride20k.com","method":"GET","resource":"https://gateway.stride20k.com/crypto/gas/:chain","category":"market","description":"EVM gas price API: current gas fees for Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, and Avalanche — node-reported gas price plus EIP-1559 estimates from the last 5 blocks: next base fee and 25th/50th/75th-percentile priority fees, in gwei. Read directly from public JSON-RPC nodes with automati","price_listed":0.002,"price_asked":0.002,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":19,"reported_calls_30d":4,"reported_payers_30d":3,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","pathParams":{"chain":"base"},"queryParams":{},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"pathParams":{"properties":{"chain":{"aliases":{"1":"ethereum","10":"optimism","137":"polygon","42161":"arbitrum","43114":"avalanche","56":"bsc","8453":"base","arb":"arbitrum","avax":"avalanche","bnb":"bsc","eth":"ethereum","matic":"polygon","op":"optimism"},"description":"Chain to query. Shorthands accepted: 1, 10, 56, 137, 8453, 42161, 43114, eth, arb, op, matic, avax, bnb.","enum":["ethereum","base","polygon","arbitrum","optimism","bsc","avalanche"],"missTrack":true,"normalize":"lower","type":"string"}},"required":["chain"],"type":"object"},"queryParams":{"properties":{},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"data":{"properties":{"blocksSampled":{"description":"Number of blocks in the fee-history sample.","type":"integer"},"chain":{"description":"Chain queried.","type":"string"},"gasPriceGwei":{"description":"eth_gasPrice in gwei.","type":"number"},"gasPriceWei":{"description":"eth_gasPrice result in wei, as decimal string.","type":"string"},"nextBaseFeeGwei":{"description":"Projected next-block base fee in gwei (EIP-1559).","type":"number"},"priorityFeeGwei":{"description":"Average priority fee over last 5 blocks at p25/p50/p75, gwei.","type":"object"}},"required":["chain","gasPriceWei","gasPriceGwei"],"type":"object"},"endpoint":{"description":"Always \"/crypto/gas/:chain\".","type":"string"},"meta":{"properties":{"attribution":{"description":"Licensing attribution when the source requires it.","type":["string","null"]},"cached":{"description":"Whether this response was served from cache.","type":"boolean"},"fetchedAt":{"description":"ISO 8601 time the data was actually retrieved from the upstream.","type":"string"},"source":{"description":"Upstream source: on-chain (PublicNode/dRPC JSON-RPC).","type":"string"}},"required":["source","cached","fetchedAt"],"type":"object"},"ok":{"description":"true on success.","type":"boolean"}},"required":["ok","endpoint","data","meta"],"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":0.002,"price_match":true,"latency_ms":19,"error":null}],"description_full":"EVM gas price API: current gas fees for Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, and Avalanche — node-reported gas price plus EIP-1559 estimates from the last 5 blocks: next base fee and 25th/50th/75th-percentile priority fees, in gwei. Read directly from public JSON-RPC nodes with automatic fallbacks. Use for transaction cost estimation, fee optimization, and timing on-chain actions. Cached up to 15 seconds.","last_updated":"2026-08-30T12:06:14.11Z","schemes":["exact"]}