All fear gauges + the VIX market-fear regime
API · /volatilityindices-api
Volatility Indices API
healthy
4,692 Subscribers
Live market "fear gauges" across asset classes as an API, served from Yahoo Finance. The VIX is the market's headline fear index — the S&P 500's 30-day implied volatility — and this returns it alongside the rest of the family: the 9-day VIX (short-term fear), the Nasdaq-100 (VXN) and Dow (VXD) volatility indices, crude-oil (OVX) and gold (GVZ) volatility, and the VVIX, the volatility of the VIX itself. Each comes with its current level, the day's change, and its day and 52-week range, and the board adds a plain-language fear regime from the VIX (complacent, normal, elevated, high or extreme). Get the whole board or one index. The implied-volatility and risk-sentiment layer for trading, macro-research and dashboard apps. Live, no key, no cache. Distinct from equity-index, crypto-volatility and FX-volatility APIs — this is the cross-asset implied-volatility (fear) suite.
api.oanor.com/volatilityindices-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 143 ms
- Server probes · 24h
- Subscribers
- 4,692
- active
- Total calls
- 57
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 9,000 calls / month
- 4 requests / second
- Hard cap (429 above quota, no overage)
- 9k calls/month
- 4 req/sec
- All endpoints
- No credit card
Starter
€9.00 /month
- 115,000 calls / month
- 12 requests / second
- Hard cap (429 above quota, no overage)
- 115k calls/month
- 12 req/sec
- Email support
Pro
€22.00 /month
- 590,000 calls / month
- 35 requests / second
- Hard cap (429 above quota, no overage)
- 590k calls/month
- 35 req/sec
- Priority support
Desk
€53.00 /month
- 3,000,000 calls / month
- 100 requests / second
- Hard cap (429 above quota, no overage)
- 3M calls/month
- 100 req/sec
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
Variance Risk Premium API
How much more volatility the options market is pricing in than the market has actually delivered — the carry that every short-volatility strategy harvests — computed live from Yahoo Finance, no key, nothing stored. Implied volatility (the VIX and its cousins) is almost always richer than the volatility that subsequently shows up: investors pay up for protection, and that gap, the variance risk premium, is one of the most persistent paid-for risks in markets. This API measures it directly across the major asset classes that publish an implied-vol index: for the S&P 500 (VIX), the Nasdaq 100 (VXN), crude oil (OVX) and gold (GVZ), it takes the live implied-vol index and subtracts the realised volatility actually delivered by the underlying over the matching ~30-day window (annualised standard deviation of daily log returns), and returns the premium in volatility points, the implied/realised ratio and a rich/cheap read. A large positive VRP means options are expensive relative to what the market has been doing (sellers are well paid); a negative VRP — implied below realised — is rare and flags that options are cheap, often during or right after a stress event. The premium endpoint returns all four markets ranked; the asset endpoint returns one market with 21- and 30-day realised legs; the history endpoint returns the VRP time series. This is the implied-minus-realised / variance-risk-premium cut for equities and commodities — distinct from the implied-vol level board (no realised leg), the realised-volatility dashboard (no implied leg) and the crypto-only DVOL/VRP API.
api.oanor.com/vrp-api
VIX Term Structure API
The shape of the equity volatility curve — the single most-watched regime signal in the options world — computed live from Yahoo Finance, no key, nothing stored. A VIX level tells you how scared the market is right now; the term structure tells you whether that fear is short-term panic or a calm, persistent state, and which way it is rolling. This API reads the S&P 500 implied-volatility curve across four tenors — the 9-day VIX, the headline 30-day VIX, the 3-month VIX and the 6-month VIX — and turns it into a regime. When the curve slopes up (VIX < VIX3M < VIX6M) the market is in contango: calm, with near-term vol cheaper than far, the state short-vol strategies harvest. When it inverts to backwardation (VIX above VIX3M) the front end is bid above the back: acute stress, fear spiking, historically near capitulation. The structure endpoint returns the live curve, the contango ratio (VIX / VIX3M), the short-end ratio (VIX9D / VIX), the roll yield a short-vol position would earn, the slope classification and a regime read, with VVIX (the vol of the VIX) for context. The history endpoint returns the daily time series of the contango ratio and flags every backwardation day. The percentile endpoint places today's contango ratio in its one-year range. This is the volatility term-structure / contango-backwardation cut — distinct from the cross-asset VIX-family level board, the crypto DVOL index and the realised-volatility APIs. It is the shape of fear, not its level.
api.oanor.com/vixterm-api
Risk-On / Risk-Off (RORO) Index
One number for the market's mood across asset classes — a live 0-100 risk-on / risk-off (RORO) score, computed from Yahoo Finance (no key, nothing stored). On any day capital is either reaching for risk or fleeing to safety, and the signal lives in the relationships between markets, not any single price. This blends four classic cross-asset gauges — stocks vs long bonds (SPY/TLT), high-yield vs investment-grade credit (HYG/LQD), copper vs gold (the growth metal vs the haven) and the VIX (inverted) — into one score: high = risk-on (greed), low = risk-off (fear). The score endpoint returns the composite, each gauge's contribution and a regime label; the components endpoint returns the four underlying ratios with where each sits in its recent range (its percentile), so you can see what is driving the mood. The cross-asset risk-sentiment / RORO composite cut — distinct from the intermarket-ratios feed (raw ratios), the volatility-index API and the price APIs. It synthesises the regime, not the parts.
api.oanor.com/riskappetite-api
Keltner Channels Screener (Multi-Asset) API
Which markets are breaking out of their volatility-adjusted trend channel, computed live from Yahoo Finance (no key, nothing stored). Keltner Channels wrap a 20-day exponential average in bands set at two Average-True-Ranges above and below it — and unlike Bollinger Bands, whose width is statistical standard deviation, Keltner's width is the market's actual trading range. A close above the upper Keltner band is a trend-following breakout (riding strength), below the lower a breakdown, and price hugging a band signals a powerful, persistent trend. For a cross-asset, cross-sector universe — equity indices and sectors, gold, oil, commodities, bonds and crypto — this computes each asset's Keltner upper, middle and lower bands, where price sits inside the channel, and flags fresh breakouts. The screener endpoint returns the upside and downside Keltner breakouts across the board. The asset endpoint returns one market's Keltner card. The universe endpoint lists what is covered. The cross-asset Keltner-channel / volatility-trend screener cut — distinct from the Bollinger-Bands screener (standard-deviation width, mean-reversion), the bring-your-own-candle ATR API and the other indicator screeners.
api.oanor.com/keltner-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Volatility Indices API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Volatility Indices API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Volatility Indices API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Volatility Indices API cost?
Volatility Indices API has a free tier with 100 calls / month. Paid plans start at €9.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Volatility Indices API GDPR-compliant?
All requests to Volatility Indices API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/volatilityindices-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/volatilityindices-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/volatilityindices-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/volatilityindices-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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