{"uid":"cap_7-Sv8CSmlJV1cWbzfDg7W","slug":"cryptopulse-volatility-check-dcf0dd9b","name":"CryptoPulse Volatility Check","description":"Volatility check for a perp market, deterministic. Answers \"how volatile is this coin right now\", \"is the range compressing or expanding\". Computed in code from Hyperliquid candles: annualized realized volatility (log-return stdev), NATR (Wilder ATR-14 / price), Bollinger(20,2) width percent and percent-B, window high/low and distance from each, over a chosen interval (15m|1h|4h|1d) and lookback. No LLM, no key, keyless public data.","url":"https://cryptopulse.theaslangroupllc.com/api/volatility-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["coin"],"properties":{"coin":{"type":"string","description":"Hyperliquid perp symbol, e.g. BTC, ETH, SOL"},"interval":{"type":"string","description":"15m | 1h | 4h | 1d (default 1h)"},"lookback":{"type":"number","description":"candles in the window (default 200, 50-500)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"errors":{"type":"object","description":"Documented error responses, keyed by HTTP status code","additionalProperties":{"type":"object","required":["description"],"properties":{"example":{"type":"object"},"description":{"type":"string"}}}},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","errors":{"400":{"example":{"error":"coin parameter required"},"description":"Invalid or missing parameter(s) — required: coin. Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."},"402":{"description":"Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."},"500":{"example":{"error":"upstream_failed"},"description":"Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."}},"example":{"coin":"ETH","metrics":{"natr_pct":0.42,"last_price":1787.1,"candles_used":200,"bollinger_pct_b":0.55,"bollinger_width_pct":1.9,"realized_vol_annualized_pct":48.2},"interval":"1h","deterministic":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":{"p10Cents":"2.0000","medianCents":"2.0000","p90Cents":"2.0000","minCents":"2.0000","maxCents":"2.0000","p95Cents":"2.0000","sampleCount":1,"varies":false,"failureChargeRate":1},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ld8H0BeekP2VNZV_yHIgY","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns realized volatility and range metrics (annualized vol, NATR, Bollinger width/percent-B, window high/low) for a Hyperliquid perpetual market over a chosen timeframe.","exampleAgentPrompt":"What's the current volatility situation for BTC on the 1h interval — is the range compressing or expanding? Give me realized vol, NATR, and Bollinger metrics.","exampleUseCases":null,"resultDescription":"Returns computed volatility statistics for the requested perp market and interval: annualized realized volatility (log-return standard deviation), NATR (Wilder ATR-14 divided by price), Bollinger Band (20,2) width percentage and percent-B, and the window high/low with current price distance from each.","failureModes":["Invalid or unsupported coin symbol returns an error","Unsupported interval value (not 15m|1h|4h|1d) returns a parameter validation error","Insufficient candle history for the requested lookback returns partial or error response","Hyperliquid data source unavailable causes computation failure","Payment not processed (x402 payment required) returns 402 status"],"whenToPreferThis":"Use this endpoint when you need deterministic, code-computed volatility metrics for a Hyperliquid perpetual market with no API key required. Prefer this over LLM-based analysis when you need precise numerical volatility figures (annualized vol, ATR, Bollinger) rather than qualitative summaries, and when you need to detect range compression/expansion programmatically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T19:14:00.766Z","isFirstParty":false,"canonicalSlug":"cryptopulse-volatility-check-dcf0dd9b"}