{"uid":"cap_sXzPKgnNCl3UeKpp-5tyj","slug":"financial-data-x402-realized-volatility-cff5347b","name":"Financial Data x402 — Realized Volatility","description":"Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.","url":"https://x402financialdata.com/volatility/%7Bticker%7D?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"note":"Annualized standard deviation of daily log returns (close-to-close), not options-implied volatility -- a backward-looking realized measure. A window is null if there isn't enough history to fill it (e.g. a recent IPO's 90d window).","as_of":"2026-07-31","ticker":"AAPL","realized_volatility_annualized_pct":{"10d":46.07,"20d":37.33,"30d":40.46,"60d":32.32,"90d":29.96}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_a4rbXA5A1Z2mQu6J53os_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns annualized realized (historical) volatility for a stock ticker across multiple lookback windows (10d, 20d, 30d, 60d, 90d)","exampleAgentPrompt":"What's the realized volatility for AAPL right now — give me the 10-day, 30-day, and 90-day annualized numbers so I can see how short-term vol compares to the longer-term trend?","exampleUseCases":[{"title":"Options pricing pre-trade check","prompt":"Before I write a covered call on NVDA, can you pull the realized volatility across all windows — 10, 20, 30, 60, and 90 days — so I can compare it against the implied vol I'm seeing?"},{"title":"Risk dashboard volatility snapshot","prompt":"I'm building a risk summary for my portfolio — can you fetch the annualized realized volatility for SPY at all available lookback windows so I can gauge current market choppiness?"},{"title":"Earnings volatility regime analysis","prompt":"Tesla earnings are coming up — what has TSLA's realized volatility looked like over the last 10, 30, and 90 days? I want to know if we're in a high-vol regime heading into the announcement."}],"resultDescription":"A JSON object containing the ticker, the as-of date, and realized volatility expressed as an annualized percentage for five rolling windows: 10-day, 20-day, 30-day, 60-day, and 90-day. Windows with insufficient history (e.g. recent IPOs) are returned as null. Volatility is calculated as the annualized standard deviation of daily log returns (close-to-close), not options-implied volatility.","failureModes":["Ticker not found or invalid symbol — likely returns an error or empty result","Insufficient price history for a window (e.g. recent IPO) — that window returns null rather than a value","Payment not received or USDC payment rejected — x402 protocol returns 402 Payment Required","Network or upstream data provider outage — may return 5xx error","Ticker passed as wrong case or with exchange suffix — may not resolve correctly"],"whenToPreferThis":"Choose this endpoint when you need backward-looking, realized (historical) volatility derived from actual price returns — not options-implied volatility. Ideal for quantitative risk models, options pricing comparisons, portfolio risk dashboards, or any workflow requiring multi-window vol term structure. Preferred when you want pay-per-call pricing with no API key or subscription setup, paying micro-amounts in USDC via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:48:18.410Z","isFirstParty":false,"canonicalSlug":"financial-data-x402-realized-volatility-cff5347b"}