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API · /optionschain-api

Stock Options Chain API

healthy 4,107 Subscribers

Live (15-minute delayed) US equity and index options chains, served from CBOE's public delayed-quotes feed. For any optionable ticker the summary endpoint returns the underlying quote — current price, day change, open/high/low/close, volume, bid/ask and the 30-day implied volatility (IV30) with its change. The expirations endpoint lists every available expiration date with its call and put contract counts. The chain endpoint returns the option contracts themselves: for each strike and expiry it gives the call/put bid, ask, last, implied volatility, open interest, volume and the full greeks — delta, gamma, theta and vega — and can be filtered by expiration date and by call or put. US index options are addressed with an underscore prefix (_SPX, _VIX). This is the single-name equity and index options surface — strikes, expiries, IV and greeks — distinct from the options-pricing calculators, the crypto-options and the FX/rate APIs in the catalogue. Live, no key on the upstream, nothing stored.

#options #options-chain #trading #derivatives #stocks #greeks #implied-volatility #cboe
api.oanor.com/optionschain-api
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Machine-readable spec so AI agents can integrate this API.

/api/optionschain-api/openapi.json
/api/optionschain-api/llms.txt

Discovery: GET /api/index.json lists every API.

Stock Options Chain API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
525 ms
Server probes · 24h
Subscribers
4,107
active
Total calls
80
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 18,000 calls / month
  • 3 requests / second
  • Hard cap (429 above quota, no overage)
  • 18,000 calls/month
  • 3 req/sec
  • Summary, expirations & full chain
  • Greeks + IV included
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Starter

€9.40 /month

  • 210,000 calls / month
  • 10 requests / second
  • Hard cap (429 above quota, no overage)
  • 210k calls/month
  • 10 req/sec
  • All expirations & strikes
  • Email support
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Pro

€27.30 /month

  • 920,000 calls / month
  • 30 requests / second
  • Hard cap (429 above quota, no overage)
  • 920k calls/month
  • 30 req/sec
  • Vol-surface & screening workloads
  • Priority support
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Scale

€63.50 /month

  • 3,300,000 calls / month
  • 80 requests / second
  • Hard cap (429 above quota, no overage)
  • 3.3M calls/month
  • 80 req/sec
  • Desk / quant scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Deribit API — oanor API marketplace

Deribit API

Live market data from Deribit — the leading crypto options and futures exchange. A keyless, no-account JSON wrapper over Deribit's public v2 API. Read the spot index price for any settlement currency (BTC, ETH, USDC, USDT), pull a full ticker for any instrument — last / mark / index price, best bid-ask, open interest and 8-hour funding for perpetuals, plus mark implied volatility and the greeks (delta, gamma, vega, theta, rho) for options — list the entire active instruments catalog by currency and kind (future, option, spot, combos) with strikes, expiries and contract sizes, and fetch per-currency order-book summaries across all live instruments. The raw exchange feed for derivatives desks, options dashboards, volatility models and trading bots — distinct from analytics products: this is Deribit's own ticker, instrument and book data, decoded into clean JSON.

api.oanor.com/deribit-api

 Paradex Perps & Options DEX API — oanor API marketplace

Paradex Perps & Options DEX API

Live market data for Paradex, the Starknet-appchain perpetuals and options DEX, with no key. List every instrument (perpetual futures, dated options and spot) with full contract specs; pull a per-market summary with mark price, 24h volume, open interest, funding rate and — for options — implied volatility and full greeks (delta, gamma, vega, theta); read the live order book; and stream recent public trades. Paradex is one of the few venues exposing on-chain options greeks over a keyless feed — ideal for derivatives dashboards and options analytics.

api.oanor.com/paradex-api

 Variance Risk Premium API — oanor API marketplace

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 — oanor API marketplace

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

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Stock Options Chain API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Stock Options Chain API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Stock Options Chain 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 Stock Options Chain API cost?
Stock Options Chain API has a free tier with 100 calls / month. Paid plans start at €9.40 / 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 Stock Options Chain API GDPR-compliant?
All requests to Stock Options Chain 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/optionschain-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/optionschain-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/optionschain-api/SOME_PATH");
curl_setopt($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/optionschain-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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