{"uid":"cap_oToCfnfezvGNXNmyaFzC5","slug":"agent-margin-router-live-eip-1559-gas-fees-5013edc1","name":"Agent Margin Router – Live EIP-1559 Gas Fees","description":"Agent Margin Router – Gas Fees: Live EIP-1559 gas fees (slow/standard/fast tiers) plus USD cost per transaction type (transfer, ERC-20 transfer, swap, NFT mint) for Base, Ethereum, Arbitrum, Optimism and Polygon. Aggregated from public RPC nodes – no API key. Pay per call with USDC or USDT on Base via x402. 3 free calls per wallet.","url":"https://agent-margin-router-production.up.railway.app/gas-fees?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"type":"string","description":"base | ethereum | arbitrum | optimism | polygon (default base)."},"max_age_seconds":{"type":"integer","description":"Max cache age (default 10)."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7gcoX5TewKgnXXDrVqlbl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live EIP-1559 gas fees (slow/standard/fast tiers) and USD transaction costs for common operation types across Base, Ethereum, Arbitrum, Optimism, and Polygon.","exampleAgentPrompt":"What are the current EIP-1559 gas fees on Ethereum right now — slow, standard, and fast tiers — and how much would a swap and an ERC-20 transfer cost in USD?","exampleUseCases":[{"title":"DeFi swap cost check before trade","prompt":"Before I execute this swap on Arbitrum, what are the current gas fees — slow, standard, and fast — and roughly how much will the swap cost me in USD right now?"},{"title":"NFT mint timing on Ethereum","prompt":"I'm about to mint an NFT on Ethereum — can you pull the live gas fees and tell me what the USD cost looks like across the slow, standard, and fast tiers so I can decide when to mint?"},{"title":"Cross-chain gas cost comparison","prompt":"Can you get me the current gas fees for Base and Polygon and show me what a standard ERC-20 transfer would cost in USD on each chain?"}],"resultDescription":"Returns current EIP-1559 gas fee tiers (slow, standard, fast in gwei/gas price units) and estimated USD costs for common transaction types — ETH transfer, ERC-20 transfer, swap, and NFT mint — for the requested chain, sourced from live public RPC nodes.","failureModes":["Unsupported chain name returns error — must be one of: base, ethereum, arbitrum, optimism, polygon","RPC node unavailability may cause stale or missing data","Cache age too short may result in rate limiting or slower responses","Payment failure via x402 (insufficient USDC/USDT balance) blocks access after 3 free calls"],"whenToPreferThis":"Choose this endpoint when you need real-time, multi-tier EIP-1559 gas estimates with USD cost breakdowns for specific transaction types (transfer, swap, NFT mint) across five major EVM chains — especially useful for agents making cost-aware transaction decisions without needing an API key.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T12:35:13.434Z","isFirstParty":false,"canonicalSlug":"agent-margin-router-live-eip-1559-gas-fees-5013edc1"}