{"uid":"cap_Mhz6I9-7H97mTCPClacsS","slug":"stock-realized-volatility-ff9ecd67","name":"Stock 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://x402-stock-indicators.vercel.app/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_OBrW2TW29pDw5mdDrSmpj","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 annualized numbers across the 10, 20, 30, 60, and 90-day windows.","exampleUseCases":[{"title":"Options strategy risk assessment","prompt":"Before I sell covered calls on NVDA, can you pull the realized volatility across all time windows so I can see whether short-term vol is elevated compared to the 90-day average?"},{"title":"Portfolio risk monitoring dashboard","prompt":"I want to check the current realized volatility for SPY to see if market choppiness has picked up — get me the annualized vol across the 10 through 90-day windows."},{"title":"Comparing two stocks' historical risk","prompt":"Can you get the realized volatility for both TSLA and MSFT so I can compare how much each has actually moved historically on an annualized basis?"}],"resultDescription":"A JSON object with the ticker symbol, the as-of date, and annualized realized volatility percentages (close-to-close log returns, annualized) for five lookback windows: 10d, 20d, 30d, 60d, and 90d. Any window where insufficient price history exists (e.g. recent IPO) is returned as null. Also includes a note clarifying this is backward-looking realized volatility, not options-implied volatility.","failureModes":["Invalid or unknown ticker symbol — returns error or empty data","Insufficient price history for a given window (e.g. recent IPO) — that window's value is null","Payment failure via x402 — HTTP 402 returned if USDC payment not completed","Network or data source outage — endpoint may be temporarily unavailable","Delisted or OTC tickers may not be supported"],"whenToPreferThis":"Choose this endpoint when you need backward-looking, realized historical volatility (annualized standard deviation of daily log returns) across multiple time horizons for a US-listed stock, without needing an API key or subscription — particularly useful in pay-per-call agentic workflows using x402/USDC micropayments. Prefer this over options-implied volatility sources when you want a pure price-history-based risk measure. Use alternatives if you need implied volatility from options markets or intraday volatility data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T06:42:13.832Z","isFirstParty":false,"canonicalSlug":"stock-realized-volatility-ff9ecd67"}