# Crypto Implied Volatility Index (DVOL) & VRP API > The crypto market's "fear gauge" and the premium option sellers earn, read live from Deribit's public DVOL index and Binance's candles — no key, nothing stored. DVOL is Deribit's 30-day forward implied-volatility index for BTC and ETH, the crypto equivalent of the VIX: the single number that says how much volatility the options market is pricing in. The index endpoint returns the latest DVOL, the session open/high/low/close, the 24-hour change and a plain-language regime label (low, normal, high, extreme). The vrp endpoint computes the variance risk premium — implied vol (DVOL) minus the realised volatility actually delivered over the last 30 days (annualised standard deviation of daily log returns from Binance candles): when implied sits well above realised, option sellers are being paid a premium and the rich/cheap signal flags it; when implied is below realised, options are cheap relative to what the market has been doing. The history endpoint returns the DVOL index time series. This is the implied-volatility-index / variance-risk-premium cut — distinct from the realised-volatility API (which has no implied leg), the equity VIX-family indices and the option-chain, skew and gamma APIs in the catalogue. Currency is BTC or ETH (the assets Deribit publishes DVOL for). ## Authentication All requests require your oanor API key in the `x-oanor-key` header. Get one at https://www.oanor.com/developer/keys. ```bash curl -H "x-oanor-key: oanor_live_…" "https://api.oanor.com/dvol-api/..." ``` ## Pricing - **Free** (Free) — 500 calls/Mo, 2 req/s - **Starter** ($11/Mo) — 13,500 calls/Mo, 6 req/s - **Pro** ($37/Mo) — 72,000 calls/Mo, 16 req/s - **Business** ($84/Mo) — 380,000 calls/Mo, 40 req/s ## Endpoints ### DVOL #### `GET /v1/history` — DVOL index time series **Parameters:** - `currency` (query, required, string) — BTC or ETH Example: `BTC` - `hours` (query, optional, string) — Lookback in hours (24-2160, default 168) Example: `168` **Example:** ```bash curl -H "x-oanor-key: $KEY" \ "https://api.oanor.com/dvol-api/v1/history?currency=BTC&hours=168" ``` **Response:** ```json { "data": { "count": 169, "source": "Deribit", "history": [ { "low": 45.97, "high": 46.4, "open": 46.11, "time": 1780621200000, "close": 45.97 }, { "low": 45.95, "high": 46.66, "open": 45.97, "time": 1780624800000, "close": 46.4 }, { "low": 45.92, "high": 46.47, "open": 46.39, "time": 1780628400000, "close": 45.92 }, { "low": 45.81, "high": 46.01, "open": 45.92, "time": 1780632000000, "close": 45.89 }, { "low": 45.62, "high": 46.4, "open": 45.89, "time": 1780635600000, "close": 46.4 }, { "low": 46.4, "high": 48.31, "open": 46.4, "time": 1780639200000, "close": 48.15 }, { "low": 46.88, "high": 48.75, "open": 48.15, "time": 1780642800000, "close": 46.88 }, { "low": 46.51, "high": 47.5, …(truncated, see openapi.json for full schema) ``` #### `GET /v1/index` — Latest DVOL with OHLC & regime **Parameters:** - `currency` (query, required, string) — BTC or ETH Example: `BTC` **Example:** ```bash curl -H "x-oanor-key: $KEY" \ "https://api.oanor.com/dvol-api/v1/index?currency=BTC" ``` **Response:** ```json { "data": { "dvol": 43.25, "note": "DVOL is Deribit's 30-day forward implied-volatility index (percent annualised) — the crypto VIX. regime: low <35, normal 35-55, high 55-80, extreme >=80.", "regime": "normal", "source": "Deribit", "day_low": 43.14, "currency": "BTC", "day_high": 46.54, "day_open": 46.42, "change_24h": -3.17, "change_24h_pct": -6.83 }, "meta": { "timestamp": "2026-06-12T01:41:11.107Z", "request_id": "8f27ba99-f167-40f2-85d0-263aa7ce8fba" }, "status": "ok", "message": "Index retrieved successfully", "success": true } ``` #### `GET /v1/vrp` — Variance risk premium (implied minus realised) **Parameters:** - `currency` (query, required, string) — BTC or ETH Example: `BTC` - `window` (query, optional, string) — Realised-vol window in days (7-90, default 30) Example: `30` **Example:** ```bash curl -H "x-oanor-key: $KEY" \ "https://api.oanor.com/dvol-api/v1/vrp?currency=BTC&window=30" ``` **Response:** ```json { "data": { "note": "implied_vol is the current DVOL; realized_vol is annualised stdev of daily log returns over window_days from Binance candles. variance_risk_premium = implied − realized: positive means the options market prices more vol than has been delivered (sellers earn the premium).", "signal": "implied ≈ realised (fair)", "source": "Deribit + Binance", "currency": "BTC", "implied_vol": 43.25, "iv_rv_ratio": 1.028, "window_days": 30, "realized_vol": 42.09, "variance_risk_premium": 1.16 }, "meta": { "timestamp": "2026-06-12T01:41:11.463Z", "request_id": "86b3bcb7-43da-4232-addc-a9db630073b8" }, "status": "ok", "message": "VRP retrieved successfully", "success": true } ``` ### Meta #### `GET /v1/meta` — Spec **Example:** ```bash curl -H "x-oanor-key: $KEY" \ "https://api.oanor.com/dvol-api/v1/meta" ``` **Response:** ```json { "data": { "note": "currency is BTC or ETH. DVOL is percent annualised. vrp window is 7-90 days (default 30). history hours is 24-2160 (default 168). Nothing cached.", "source": "Deribit public API (DVOL) + Binance daily candles (realised), live", "service": "dvol-api", "btc_dvol": 43.25, "endpoints": { "GET /v1/vrp": "Variance risk premium: implied (DVOL) minus realised vol with a rich/cheap signal (currency=BTC, window=30).", "GET /v1/meta": "This document.", "GET /v1/index": "Latest DVOL with session OHLC and regime (currency=BTC).", "GET /v1/history": "DVOL index time series (currency=BTC, hours=168)." }, "currencies": [ "BTC", "ETH" ], "description": "Crypto implied-volatility index (DVOL) and variance risk premium, read live from Deribit's DVOL index and Binance candles (no key, nothing stored). index returns the latest DVOL — Deribit's 30-day forward implied vol for BTC/ETH, the crypto VIX — with the session OHLC and a regime label. vrp computes the variance risk premium: implied (DVOL) minus realised vol over a window, with a rich/cheap signal. history returns the DVOL time series. The implied-vol-index / variance-risk-premium cut — distinct from the realised-volatility API, the equity VIX-family indices and the option-chain/skew/gamma APIs.", "upstream_status": "ok" }, "meta": { "timestamp": …(truncated, see openapi.json for full schema) ``` --- Marketplace page: https://www.oanor.com/api/dvol-api OpenAPI spec: https://www.oanor.com/api/dvol-api/openapi.json