{"uid":"cap_L0RI12wYQdTmtNy2qBihJ","slug":"carbon-cashmere-eth-volatility-api-1b8eaeee","name":"Carbon & Cashmere ETH Volatility API","description":"Professional crypto market intelligence. Real-time prices, signals, and market scoring.","url":"https://api.carbon-cashmere.de/v1/volatility/ETH","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_v2CPgFf1fWH9n3zPb4tOw","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 ETH volatility metrics including realized volatility, range-based estimators, downside risk, and vol-of-vol for use in crypto market intelligence workflows.","exampleAgentPrompt":"What's the current realized volatility and downside risk for ETH — give me the 7-day, 30-day, and Parkinson/Garman-Klass range-based estimates from Carbon & Cashmere?","exampleUseCases":[{"title":"ETH options pricing risk inputs","prompt":"I'm pricing some ETH options and need the full volatility picture — can you pull the 7-day and 30-day realized vol, the Garman-Klass and Parkinson estimates, and the vol-of-vol so I can sanity-check my model inputs?"},{"title":"Portfolio ETH downside risk check","prompt":"Before I rebalance my crypto portfolio today, can you check how risky ETH looks right now — specifically the 30-day downside risk and realized volatility so I know if I should reduce my exposure?"},{"title":"Crypto risk dashboard daily update","prompt":"Run my daily ETH risk summary — I need the realized volatility across all horizons, the range-based estimators, and the current vol-of-vol so I can update the dashboard before the market opens."}],"resultDescription":"A JSON object with realized volatility at 7d, 30d, and full-period horizons; range-based estimators (Parkinson, Garman-Klass); 30-day downside risk; and vol-of-vol at 30 days — all for ETH, with a disclaimer that data is informational only.","failureModes":["Invalid or unsupported asset symbol returns an error","Network timeout if upstream price feeds are delayed","Malformed request returns 4xx with schema validation error","Missing x402 payment header results in payment-required error"],"whenToPreferThis":"Use this endpoint when you need quantitative ETH volatility estimates across multiple methodologies (realized, range-based, downside) in a single call — especially when building risk dashboards, options pricing tools, or portfolio monitoring workflows that require more than just spot price.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:43:45.140Z","isFirstParty":false}