{"uid":"cap_wpnrSqQ-75yrB_Ih_l6c_","slug":"carbon-cashmere-volatility-api-btc-18808daa","name":"Carbon & Cashmere Volatility API – BTC","description":"Professional crypto market intelligence. Real-time prices, signals, and market scoring.","url":"https://api.carbon-cashmere.de/v1/volatility/BTC","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"_meta":{"disclaimer":"Informational research data only — not investment advice."},"symbol":"BTC","range_based":{"parkinson":0.41,"garman_klass":0.4},"downside_30d":0.28,"realized_vol":{"7d":0.32,"30d":0.38,"full_period":0.42},"vol_of_vol_30d":0.09}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BWUfjFEhX76piWY-6wvdS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns multi-model Bitcoin volatility metrics including realized volatility across time windows, range-based estimators (Parkinson, Garman-Klass), downside volatility, and volatility-of-volatility.","exampleAgentPrompt":"What are the current volatility metrics for Bitcoin — including the 7-day and 30-day realized vol, the Parkinson and Garman-Klass range-based estimates, and the downside volatility?","exampleUseCases":[{"title":"Assess BTC risk before portfolio rebalancing","prompt":"Before I rebalance my crypto portfolio, can you pull the latest Bitcoin volatility metrics — including the 30-day realized vol, downside volatility, and Garman-Klass estimate — so I can gauge how risky it is to increase my BTC position right now?"},{"title":"Monitor Bitcoin volatility regime changes","prompt":"I want to know if Bitcoin's volatility has been unusually unstable lately — what's the current volatility-of-volatility, and how does the 7-day realized vol compare to the 30-day figure?"},{"title":"Size options position using advanced vol estimates","prompt":"I'm pricing a Bitcoin options trade and need more than just a simple rolling vol — can you fetch the Parkinson and Garman-Klass range-based volatility estimates alongside the 30-day realized and downside volatility so I can size the position properly?"}],"resultDescription":"Returns a JSON object with Bitcoin's realized volatility over 7d, 30d, and full period; Parkinson and Garman-Klass range-based volatility estimates; 30-day downside volatility; and 30-day volatility-of-volatility, along with an informational disclaimer.","failureModes":["Invalid or unsupported symbol returns an error","Payment not processed (x402 payment required, insufficient USDC balance)","Upstream data unavailable leads to stale or missing metrics","Rate limiting if too many calls in short succession"],"whenToPreferThis":"Use this endpoint when you need rigorous, multi-model volatility estimates for Bitcoin specifically — particularly when you need range-based estimators (Parkinson, Garman-Klass) alongside standard realized volatility and downside risk, rather than a single implied or simple rolling volatility figure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:47:11.652Z","isFirstParty":false}