{"uid":"cap_ZyC8Z-qm-i--ifnTcSLWk","slug":"evm-multi-chain-gas-price-api-13a68d31","name":"EVM Multi-Chain Gas Price API","description":"","url":"https://api.x-402.online/v1/crypto/gas","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1KSG37RCqf4pplKLhJI64","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live gas prices in gwei for up to 7 EVM-compatible chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Avalanche) in a single call, with optional filtering by chain.","exampleAgentPrompt":"What's the current gas price in gwei on Base right now — and how does it compare to Ethereum and Arbitrum?","exampleUseCases":[{"title":"Pre-transaction gas check","prompt":"Before I send this ETH transfer, what's the current gas price on Ethereum mainnet in gwei?"},{"title":"Cheapest chain routing for DeFi","prompt":"I want to make a DeFi swap — which of these chains has the lowest gas fees right now: Arbitrum, Optimism, Polygon, or Base?"},{"title":"Multi-chain gas dashboard","prompt":"Give me a snapshot of live gas prices across all 7 EVM chains — Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, and Avalanche — so I can decide where to deploy my contract."}],"resultDescription":"Returns current gas prices in gwei for the requested chain(s). When no chain filter is provided, the response includes gas data for all 7 supported EVM networks (Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Avalanche). When filtered with ?chain=<name>, returns gas data for that single chain only.","failureModes":["Unsupported chain name in query parameter returns an error or empty result","Temporary RPC node unavailability may return stale or missing gas data for a specific chain","Network congestion spikes may cause brief latency in data freshness","Malformed query parameter (e.g. typo in chain name) returns no matching chain data"],"whenToPreferThis":"Choose this endpoint when you need real-time gas prices across multiple EVM chains simultaneously in a single API call, or when you want to compare fees across networks to route a transaction optimally. It covers 7 major EVM chains in one request, making it more efficient than querying each chain's RPC individually. Prefer this over block explorer APIs when you need a unified multi-chain view without managing multiple integrations.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:26:16.752Z","isFirstParty":false}