finance.options

stable 2 credits

Delayed options chain for a ticker, every listed contract with quotes and Greeks.

GET /v1/finance/options

What you get#

A list of Finance results in Onekey's unified shape, in data (an array). An empty array is a normal, successful answer and is charged like any other; a source that reports "nothing found" as an error returns a free 404 not_found instead.

What it costs#

2 credits for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`symbol`	string	yes	(required)	Underlying ticker, e.g. AAPL, or an index with a leading underscore (_SPX)	max 10 chars; must match `_?[A-Z0-9]{1,9}`; trimmed, upper

Request#

curl "https://api.onekey.dev/v1/finance/options?symbol=AAPL" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Finance response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": [
    {
      "market": {
        "symbol": "AAPL261002P00310000",
        "bid": 0.01,
        "ask": 0.02,
        "price": 0.02,
        "open": 0.05,
        "high": 0.05,
        "low": 0.01,
        "volume": 2074,
        "openInterest": 2356
      },
      "ext": {
        "lastTradeTime": "2026-10-01T15:59:25Z",
        "impliedVolatility": 0.4796,
        "delta": -0.0059,
        "gamma": 0.002,
        "theta": -0.0151,
        "vega": 0.003,
        "rho": -0.0001,
        "theoreticalPrice": 0.015
      }
    },
    {
      "market": {
        "symbol": "AAPL261002P00315000",
        "bid": 0.02,
        "ask": 0.03,
        "price": 0.03,
        "open": 0.08,
        "high": 0.11,
        "low": 0.02,
        "volume": 7158,
        "openInterest": 1921
      },
      "ext": {
        "lastTradeTime": "2026-10-01T15:54:38Z",
        "impliedVolatility": 0.3951,
        "delta": -0.0097,
        "gamma": 0.0038,
        "theta": -0.0212,
        "vega": 0.0047,
        "rho": -0.0003,
        "theoreticalPrice": 0.0212
      }
    }
  ],
  "metadata": {
    "platform": "finance",
    "endpoint": "options",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 2,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`option`	`market.symbol`	-
`bid`	`market.bid`	`toNumber`
`ask`	`market.ask`	`toNumber`
`last_trade_price`	`market.price`	`toNumber`
`open`	`market.open`	`toNumber`
`high`	`market.high`	`toNumber`
`low`	`market.low`	`toNumber`
`volume`	`market.volume`	`toNumber`
`open_interest`	`market.openInterest`	`toNumber`
`last_trade_time`	`ext.lastTradeTime`	`toIsoDate`
`iv`	`ext.impliedVolatility`	`toNumber`
`delta`	`ext.delta`	`toNumber`
`gamma`	`ext.gamma`	`toNumber`
`theta`	`ext.theta`	`toNumber`
`vega`	`ext.vega`	`toNumber`
`rho`	`ext.rho`	`toNumber`
`theo`	`ext.theoreticalPrice`	`toNumber`

Caching and freshness#

Fresh for about 1 minute. Repeat calls in that window are served from cache and are free.
Between 1 minute and 5 minutes the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 15 minutes more (marked stale).
A "not found" is remembered for 2 minutes and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	Unknown endpoint path.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).