{"uid":"cap_UI9H05vc1Fn4W8adsmyrP","slug":"kronos-eth-spot-price-x402-60cb49d8","name":"Kronos ETH Spot Price (x402)","description":"Paid market-intelligence API over x402","url":"https://kronossignals.com/api/v1/price/eth","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"as_of":"2026-07-02T10:00:00.000Z","asset":"BTC-USD","price":107500,"sources":[{"price":107510,"volume":1200000000,"exchange":"binance","included":true,"vol_weight":0.45},{"price":107490,"volume":800000000,"exchange":"coinbase","included":true,"vol_weight":0.3},{"price":107500,"volume":400000000,"exchange":"kraken","included":true,"vol_weight":0.15},{"price":107480,"volume":270000000,"exchange":"okx","included":true,"vol_weight":0.1}],"confidence":"high","disclaimer":"Volume-weighted median price from up to 4 exchanges. Informational only, not financial advice.","data_age_seconds":0,"outliers_rejected":0,"price_simple_median":107480,"cross_exchange_spread_pct":0.08}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ELMTn-0QG8fMEji4wNq6j","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a multi-source volume-weighted median spot price for Ethereum (ETH) with per-exchange breakdown, confidence rating, and outlier rejection, delivered over the x402 micropayment protocol.","exampleAgentPrompt":"What's the current Ethereum price right now? I want the volume-weighted median across multiple exchanges with a confidence score and the per-exchange breakdown.","exampleUseCases":[{"title":"DeFi bot pre-trade price check","prompt":"Before executing this ETH swap, grab the current volume-weighted median ETH price with the cross-exchange spread and confidence level so I know market conditions are stable."},{"title":"Portfolio dashboard ETH valuation","prompt":"Update my portfolio dashboard with the latest Ethereum spot price — I need the VWM price, which exchanges contributed, and how fresh the data is."},{"title":"Algo trading spread monitor","prompt":"Pull the current ETH price from Kronos and tell me the cross-exchange spread percentage and whether any exchanges were flagged as outliers."}],"resultDescription":"A JSON object containing: volume-weighted median ETH price, timestamp (as_of), asset identifier, array of contributing exchanges each with their price, volume, volume weight, and inclusion flag, overall confidence label (e.g. high), simple median price, cross-exchange spread percentage, number of outliers rejected, data age in seconds, and a disclaimer.","failureModes":["Payment not received or malformed x402 payment header — returns 402 Payment Required","Invalid or unsupported asset path — returns 404 or error body","Exchange data feeds temporarily unavailable — may return lower confidence or stale data","Network timeout to upstream exchanges — may increase data_age_seconds","Rate limiting or provider outage — returns 5xx error"],"whenToPreferThis":"Choose this endpoint when you need a manipulation-resistant, aggregated Ethereum spot price sourced from multiple top exchanges (Binance, Coinbase, Kraken, OKX) with volume weighting, outlier rejection, and a machine-readable confidence score. Prefer it over single-exchange feeds when spread awareness and cross-exchange validation matter, and when you are already operating in an x402 micropayment environment making per-call cost trivial.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:57:07.076Z","isFirstParty":false}