{"uid":"cap_slp8nPUi3euCRxXkrGWqP","slug":"netintel-gas-price-api-bef36fb5","name":"NetIntel Gas Price API","description":"Live gas prices across Base, Ethereum, Arbitrum, Optimism, and Polygon with USD cost estimates for a transfer, an ERC-20 send, and a swap — keyless, one call, all chains. Per chain: gas price + EIP-1559 base/priority fee in gwei, native-token USD price, 15s cache. L2 figures are execution-gas only (L1 data fee excluded, flagged in findings).","url":"https://netintel.dev/gas/price","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"chains":{"type":"string","description":"Comma list from base, ethereum, arbitrum, optimism, polygon; omit for all 5. Aliases: chain, network, networks; eth/arb/op/matic/pol accepted"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"stale":{"type":"boolean"},"chains":{"type":"object","additionalProperties":{"type":["object","null"],"properties":{"source":{"type":"string"},"native_usd":{"type":["number","null"]},"native_token":{"type":"string"},"base_fee_gwei":{"type":["number","null"]},"usd_estimates":{"type":"object","properties":{"swap":{"type":["number","null"]},"transfer":{"type":["number","null"]},"erc20_transfer":{"type":["number","null"]}}},"gas_price_gwei":{"type":["number","null"]},"cache_age_seconds":{"type":"number"},"priority_fee_gwei":{"type":["number","null"]}}}},"findings":{"type":"array"}}}}}}},"responseSchema":{"type":"json","example":{"stale":false,"chains":{"base":{"source":"https://mainnet.base.org","native_usd":1829.645,"native_token":"ETH","base_fee_gwei":0.005,"usd_estimates":{"swap":0.00219557,"transfer":0.000230535,"erc20_transfer":0.000713562},"gas_price_gwei":0.006,"cache_age_seconds":0,"priority_fee_gwei":0.001},"ethereum":{"source":"https://ethereum-rpc.publicnode.com","native_usd":1829.645,"native_token":"ETH","base_fee_gwei":0.120496247,"usd_estimates":{"swap":0.0438847,"transfer":0.0046079,"erc20_transfer":0.0142625},"gas_price_gwei":0.119926866,"cache_age_seconds":0,"priority_fee_gwei":0.1}},"findings":[{"rule":"l2_data_fee_excluded","detail":"base estimates are execution-gas only and exclude the L1 data fee"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iOd_8ECJk23yWysq2cjhM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","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 and USD cost estimates for transfers, ERC-20 sends, and swaps across Base, Ethereum, Arbitrum, Optimism, and Polygon in a single call","exampleAgentPrompt":"What are the current gas prices and USD cost estimates for a swap and a token transfer on Base, Ethereum, and Arbitrum right now?","exampleUseCases":[{"title":"Cheapest chain for DeFi swap","prompt":"I want to do a token swap — can you check gas prices across all five chains (Base, Ethereum, Arbitrum, Optimism, Polygon) and tell me which one is cheapest in USD right now?"},{"title":"Pre-trade gas cost check","prompt":"Before I send an ERC-20 token on Ethereum, what's the current gas price in gwei and roughly how much will that transfer cost me in USD?"},{"title":"Multi-chain gas dashboard","prompt":"Pull live gas prices and USD estimates for transfers and swaps on Optimism and Polygon so I can decide which to use for my next transaction."}],"resultDescription":"A JSON object keyed by chain name, each containing: gas_price_gwei, base_fee_gwei, priority_fee_gwei, native_token symbol, native_usd price, cache_age_seconds, and usd_estimates with separate USD costs for transfer, erc20_transfer, and swap. Also includes a top-level stale boolean and a findings array flagging caveats such as L2 L1 data fee exclusions.","failureModes":["Unknown chain alias returns null entry for that chain","All chains unavailable returns stale:true with empty chain data","Malformed chains query param returns 400 or falls back to all chains","Native token price feed outage causes native_usd to be null, disabling USD estimates","Payment not included or insufficient causes 402 Payment Required before data is returned"],"whenToPreferThis":"Choose this endpoint when you need current gas prices and USD cost estimates across multiple EVM chains in a single call without managing separate RPC connections. It is ideal for agents that need to compare fees across Base, Ethereum, Arbitrum, Optimism, and Polygon simultaneously, or that need ready-made USD estimates for common operations (transfer, ERC-20 send, swap) rather than computing them from raw gwei. The 15-second cache makes it suitable for near-real-time decision-making without hammering RPC nodes.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:32:37.368Z","isFirstParty":false}