{"uid":"cap_QV3HRoeovmalgL6JXtTCT","slug":"halowerk-kettenwerk-gas-fee-api-36202502","name":"HALOWERK kettenwerk Gas Fee API","description":"HALOWERK kettenwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.","url":"https://kette.netzhandwerker.de/gas?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType"],"properties":{"type":{"const":"http"},"method":{"const":"POST"},"bodyType":{"const":"json"},"schemaUrl":{"type":"string","format":"uri"},"exampleUrl":{"type":"string","format":"uri"}},"additionalProperties":true},"output":{"type":"object","required":["type"],"properties":{"type":{"const":"json"},"schemaUrl":{"type":"string","format":"uri"},"exampleUrl":{"type":"string","format":"uri"}},"additionalProperties":true}},"additionalProperties":true},"responseSchema":null,"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_FMnQ7Sg6h5P9EhMKAalZz","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 current gas fees and estimated transaction costs for a specified EVM-compatible blockchain and transaction type","exampleAgentPrompt":"What are the current gas fees on Arbitrum for an ERC-20 transfer — show me all three speed tiers so I can decide whether to go slow or fast?","exampleUseCases":[{"title":"DeFi swap cost check before execution","prompt":"Before I do this token swap on Polygon, can you check the current gas fees so I know roughly what it'll cost me at normal speed?"},{"title":"Contract deployment cost estimation","prompt":"I'm about to deploy a smart contract on Optimism — what are the current gas fees and what would it actually cost me for a contract deploy at fast speed?"},{"title":"Cross-chain gas fee comparison","prompt":"Can you pull the current gas fees on Ethereum, Arbitrum, and Base for an ERC-20 transfer so I can see which network is cheapest right now?"}],"resultDescription":"Returns gas fee data for the requested EVM chain across all three speed tiers (slow/normal/fast), along with a total cost estimate in native token and USD for the specified transaction type profile, including the assumed gas limit and calldata byte size used in the calculation.","failureModes":["Unsupported chain value returns validation error","Invalid speed or tx_type enum returns 400 bad request","Payment failure or insufficient USDC balance returns 402","Network congestion may cause stale or delayed fee data","Chain RPC node unavailability may cause 503 or timeout"],"whenToPreferThis":"Choose this endpoint when you need real-time gas fee estimates across major EVM chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BSC) broken down by transaction type (native transfer, ERC-20, swap, NFT mint, contract deploy). Particularly useful when an agent needs to estimate costs before submitting an on-chain transaction or when comparing fees across networks. The per-transaction pricing via x402/USDC makes it suitable for pay-as-you-go agent workflows without subscription overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:12:06.893Z","isFirstParty":false,"canonicalSlug":"halowerk-kettenwerk-gas-fee-api-36202502"}