{"uid":"cap_RvM9FwyU9wSnme6eLsPMH","slug":"ethereum-gas-estimator-agentshelf-syntexa-ch-184a3b59","name":"Ethereum Gas Estimator (agentshelf.syntexa.ch)","description":"Call when an agent needs eth_estimateGas, the current gas price, and the estimated cost in ETH and USD for an Ethereum transaction. Send to and optional from, data, and value. Read-only. No spend. Send JSON {\"to\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/eth-estimate-gas first.","url":"https://agentshelf.syntexa.ch/v1/eth-estimate-gas?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"to":{"type":"string","examples":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],"description":"Optional recipient or contract on Ethereum mainnet. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. Required when data is omitted."},"data":{"type":"string","maxLength":2048,"description":"Optional calldata, even-length 0x hex, at most 2048 characters. Example: 0x. Required when to is omitted."},"from":{"type":"string","description":"Optional sender on Ethereum mainnet. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. EIP-55 or all one case. Read-only."},"value":{"type":"string","description":"Optional value in wei, as a decimal integer or 0x hex quantity. Example: 0. Omit it for zero."}}},"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":"unknown","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_LPgCkDtndBpWbHNRbGk8r","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":"Estimates gas usage, current gas price, and total transaction cost in ETH and USD for an Ethereum mainnet transaction.","exampleAgentPrompt":"How much will it cost in ETH and USD to send a transaction to 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet right now? Give me the gas estimate and current gas price.","exampleUseCases":[{"title":"Pre-flight ETH transfer cost check","prompt":"Before I send ETH to 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045, can you estimate how much gas it'll use and what it'll cost me in USD at today's gas price?"},{"title":"Smart contract call gas estimation","prompt":"I want to call a contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 with calldata 0xa9059cbb — can you estimate the gas and tell me the total cost in ETH and dollars?"},{"title":"DeFi transaction cost sanity check","prompt":"Can you check how much gas this Ethereum swap transaction will cost? The calldata is 0x38ed1739 and it's going to 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, with 1000000000000000000 wei of value."}],"resultDescription":"Returns the estimated gas units (eth_estimateGas result), the current network gas price in wei or gwei, and the total estimated transaction cost expressed in both ETH and USD at the current price.","failureModes":["Invalid or missing 'to' address when 'data' is also absent — returns validation error","Malformed hex in 'data' field (odd-length or non-hex characters) — returns bad request","Transaction would revert on-chain (e.g. contract reverts) — gas estimation fails with revert error","Ethereum node unavailable or rate-limited — returns 503 or timeout","Payment not included or insufficient USDC on Base — returns 402 Payment Required; sandbox endpoint available for free testing"],"whenToPreferThis":"Use this endpoint when you need a quick, read-only gas estimate for an Ethereum mainnet transaction without executing it. Ideal for pre-flight cost checks before submitting a transaction, or when you need both ETH and USD cost breakdowns without building your own RPC integration. The sandbox endpoint at /v1/sandbox/eth-estimate-gas is free to try before paying $0.003 USDC per live call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:37:18.232Z","isFirstParty":false,"canonicalSlug":"ethereum-gas-estimator-agentshelf-syntexa-ch-184a3b59"}