{"uid":"cap_HH3SbwQB3A9HNzNUzaXPm","slug":"kronos-cex-premium-spread-api-45ea9feb","name":"Kronos CEX Premium Spread API","description":"Paid market-intelligence API over x402","url":"https://kronossignals.com/api/v1/cex-premium/%7Basset%7D","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","available":true,"disclaimer":"Cross-exchange premium is informational only. Spread may reflect latency, liquidity, or fees — not a pure demand signal. Not financial advice.","premium_pct":0.2,"sources_used":[{"role":"reference","price":61320.5,"exchange":"coinbase"},{"role":"composite","price":61195.2,"exchange":"okx"},{"role":"composite","price":61201.4,"exchange":"kraken"},{"role":"composite","price":61198.3,"exchange":"binance"}],"coinbase_price":61320.5,"interpretation":"Coinbase is trading at a +0.20% premium to global composite. Mild US/institutional demand bias.","historical_note":"Point-in-time only — no 24h percentile or 30d z-score (no historical baseline stored).","composite_median":61198.3,"composite_source_count":3}},"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_m7TGPzsgaFdMrFYlR8l0M","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 the cross-exchange price premium of a crypto asset on Coinbase versus a global composite median across OKX, Kraken, and Binance, with an interpretive label indicating US/institutional demand bias.","exampleAgentPrompt":"What's the current Coinbase premium for BTC-USD right now — is it trading above or below the global composite median across OKX, Kraken, and Binance, and what does that signal about US demand?","exampleUseCases":[{"title":"Detect US institutional demand surge","prompt":"Check the Coinbase premium for BTC-USD right now and tell me if there's a meaningful premium versus the global composite — I want to know if US institutional demand is spiking."},{"title":"Cross-exchange arbitrage opportunity scan","prompt":"Pull the current CEX premium for ETH-USD and show me how much Coinbase is trading above or below OKX, Kraken, and Binance so I can evaluate if a spread exists worth watching."},{"title":"Market regime context for trading decision","prompt":"Before I place a BTC trade, can you grab the Kronos cross-exchange premium for BTC-USD and tell me what the spread and interpretation say about current demand bias?"}],"resultDescription":"A JSON object containing the asset symbol, timestamp, Coinbase spot price, composite median price (from OKX, Kraken, Binance), premium percentage (positive = Coinbase above composite), number of sources used, a human-readable interpretation string (e.g. 'Mild US/institutional demand bias'), availability flag, and a disclaimer. Point-in-time only — no historical percentile or z-score included.","failureModes":["Unsupported asset symbol returns an error or available:false","Downstream exchange feed unavailable may reduce composite_source_count or mark available:false","Payment failure via x402 protocol blocks the response","Stale data if exchange APIs are delayed — timestamp reflects data age","Malformed asset parameter (e.g. missing '-USD' suffix) may return error"],"whenToPreferThis":"Choose this endpoint when you need a real-time, point-in-time view of how Coinbase's price compares to a global composite of major non-US exchanges (OKX, Kraken, Binance), specifically to gauge US or institutional demand bias. Prefer it over generic price feeds when the cross-exchange premium signal — not just the raw price — is what matters for your analysis or trading context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:44:12.420Z","isFirstParty":false}