{"uid":"cap_2kgFn8nkSuZioPOLpJouk","slug":"xynaptic-gas-fees-29cff8e4","name":"Xynaptic Gas Fees","description":"Xynaptic Gas Fees — live gas prices across chains (Ethereum, Base) with slow/average/fast tiers in Gwei + estimated transfer cost. GET no params. Plan your on-chain transaction timing.","url":"https://api.xynaptic.io/v1/crypto-gas-fees?utm_source=zero.xyz","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/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_-lpVVoSOGDqYCuuee4fiO","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 gas prices for Ethereum and Base chains across slow, average, and fast tiers in Gwei plus estimated transfer cost","exampleAgentPrompt":"What are the current gas fees on Ethereum and Base right now — show me slow, average, and fast Gwei prices so I can decide when to send my transaction?","exampleUseCases":[{"title":"DeFi transaction timing decision","prompt":"Check current gas prices on Ethereum — I want to know the slow, average, and fast Gwei tiers so I can decide whether to wait or submit my swap now."},{"title":"Cross-chain gas comparison","prompt":"What are the live gas fees on both Ethereum and Base right now? I need the slow, average, and fast tiers so I can figure out which chain is cheaper for my transfer."},{"title":"Automated gas alert bot","prompt":"Fetch the current Ethereum gas fees for me and let me know if the fast tier is under 20 Gwei — I'm waiting for a cheap window to mint."}],"resultDescription":"A JSON response containing live gas price tiers (slow, average, fast) in Gwei for Ethereum and Base chains, along with an estimated transfer cost in USD or native token units, allowing agents to assess transaction cost and timing.","failureModes":["Upstream gas oracle unavailable — returns 5xx error if the data source is down","Rate limiting — returns 429 if call quota exceeded","Payment not fulfilled — returns 402 if x402 payment is not provided or fails","Stale data — prices may lag by seconds during extreme network congestion"],"whenToPreferThis":"Choose this endpoint when you need live, multi-chain gas fee data (Ethereum and Base) with tier breakdowns (slow/average/fast) in a single no-parameter GET call. Ideal for agents that need to automate transaction timing, display gas cost estimates, or trigger actions based on gas thresholds. Prefer it over on-chain RPC calls when you want a clean REST API without managing Web3 node connections.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T18:48:25.607Z","isFirstParty":false,"canonicalSlug":"xynaptic-gas-fees-29cff8e4"}