{"uid":"cap_halLy-p02gBDsjvVvcHE3","slug":"kronos-volatility-api-72ef8a3a","name":"Kronos Volatility API","description":"Paid market-intelligence API over x402","url":"https://kronossignals.com/api/v1/volatility/%7Basset%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"note":"All estimates are annualized realized volatility using closed daily candles. Annualized by sqrt(252) trading-day convention.","as_of":"2026-07-02T10:00:00.000Z","asset":"BTC-USD","source":"Binance daily klines (closed candles only)","symbol":"BTCUSDT","disclaimer":"Realized volatility from Binance daily OHLC. Historical; not a forecast. Not financial advice.","term_structure":[{"note":"annualized realized volatility","window":"7d","n_candles":7,"parkinson":0.48,"percentile":0.72,"vol_regime":"elevated","garman_klass":0.51,"best_estimator":"parkinson","close_to_close":0.54},{"note":"annualized realized volatility","window":"30d","n_candles":30,"parkinson":0.58,"percentile":0.81,"vol_regime":"elevated","garman_klass":0.61,"best_estimator":"garman_klass","close_to_close":0.62}],"vol_7d_annualized":0.54,"percentile_context":[{"max":1.05,"min":0.22,"estimator":"parkinson","percentile":0.72,"vol_window":"7d","current_vol":0.48,"sample_count":87,"is_window_low":false,"is_window_high":false},{"max":0.98,"min":0.28,"estimator":"parkinson","percentile":0.81,"vol_window":"30d","current_vol":0.58,"sample_count":87,"is_window_low":false,"is_window_high":true}],"vol_30d_annualized":0.62}},"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_eIU-TcCTLaRhfxi2THwux","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 annualized realized volatility term structure (7d and 30d) for a crypto asset, including Parkinson, Garman-Klass, and close-to-close estimators with percentile context and vol regime classification.","exampleAgentPrompt":"What's the current realized volatility for BTC-USD — give me the 7-day and 30-day annualized numbers, which estimator Kronos recommends, and whether we're in an elevated vol regime right now.","exampleUseCases":[{"title":"Options pricing vol input check","prompt":"Before I price this BTC options position, pull the latest realized volatility for BTC-USD — I need the 7-day and 30-day annualized vols, the Garman-Klass and Parkinson estimates, and what percentile each window is sitting at historically."},{"title":"Crypto trading regime filter","prompt":"Is BTC currently in an elevated or normal volatility regime? Give me the Kronos vol term structure for BTC-USD so I can decide whether to size down my position."},{"title":"Automated risk dashboard update","prompt":"Fetch the latest realized volatility data for ETH-USD including the 30-day annualized vol, its historical percentile rank, and whether it's at a window high — I'm updating my risk dashboard."}],"resultDescription":"A JSON object containing: annualized realized volatility for 7d and 30d windows (close-to-close, Parkinson, Garman-Klass estimators), a recommended best estimator per window, volatility regime label (e.g. 'elevated'), full percentile context (current vol, historical min/max, sample count, window-high/low flags), data source attribution (Binance daily klines), and timestamp of the snapshot.","failureModes":["Unsupported asset symbol returns error or empty response","Stale data if Binance feed is delayed — check as_of timestamp","Malformed asset path parameter causes 4xx error","Payment not processed (x402 flow failure) results in 402 response with no data","Insufficient candles for a window if asset is newly listed"],"whenToPreferThis":"Choose this endpoint when you need multi-estimator realized volatility with historical percentile context for crypto assets — particularly when you need Parkinson or Garman-Klass high-low range estimators rather than simple close-to-close vol. Prefer this over generic price APIs when the use case is risk management, options pricing, regime detection, or vol-based position sizing. The term structure (7d vs 30d) and vol regime label make it more useful than a single-number vol figure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:43:39.397Z","isFirstParty":false}