{"uid":"cap_E5NsFQlpnMw6yvDYElvej","slug":"api-carbon-cashmere-de-86f9c2a2","name":"Carbon Cashmere Realized Volatility Analytics","description":"Multi-estimator realized volatility analytics — realized vol (7d/30d/full), Parkinson range-based (high-low log), Garman-Klass (O/H/L/C), downside semi-variance, vol-of-vol. All annualized for 4h bars (× sqrt(2190)). Informational research data — not investment advice.","url":"https://api.carbon-cashmere.de/v1/volatility/:coin","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.12","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":"$0.12/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.12","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.12","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iCeA15aUeiQk--H0kdxqK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.12","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns multi-estimator realized volatility metrics for a cryptocurrency using 4h bars, including realized vol (7d/30d/full), Parkinson, Garman-Klass, downside semi-variance, and vol-of-vol, all annualized.","exampleAgentPrompt":"Can you pull the full realized volatility breakdown for ETH — including Parkinson, Garman-Klass, downside semi-variance, and vol-of-vol, all annualized from 4h bars?","exampleUseCases":null,"resultDescription":"Returns annualized volatility estimates across multiple estimators: realized vol at 7d, 30d, and full lookback windows; Parkinson high-low log range vol; Garman-Klass open/high/low/close vol; downside semi-variance; and volatility-of-volatility — all computed from 4-hour OHLC bars scaled by sqrt(2190).","failureModes":["Unknown or unsupported coin symbol returns a 404 or error response","Network timeout if the underlying data source is unavailable","Invalid coin path parameter returns a 400 bad request","Stale or insufficient bar data may affect accuracy of shorter-window estimates"],"whenToPreferThis":"Choose this endpoint when you need multiple professional-grade realized volatility estimators (not just simple standard deviation) for a cryptocurrency, especially when you want Parkinson or Garman-Klass range-based estimates, downside semi-variance for risk analysis, or vol-of-vol as a second-order risk metric, all properly annualized from 4h bars.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:52:09.948Z","isFirstParty":false}