binance.klines

stable Advanced

Candlesticks (OHLCV) for a spot symbol.

GET /v1/binance/klines

What you get#

A list of Binance 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#

Advanced · 5 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)	Spot symbol, UPPERCASE, e.g. BTCUSDT	max 20 chars; must match `[A-Z0-9]{2,20}`; trimmed
`interval`	string	no	`1h`	Candle interval	max 3 chars; must match `1s\|1m\|3m\|5m\|15m\|30m\|1h\|2h\|4h\|6h\|8h\|12h\|1d\|3d\|1w\|1M`; trimmed
`limit`	string	no	`100`	Number of candles (1-500)	max 3 chars; must match `[1-9]\d{0,2}`; trimmed

Request#

curl "https://api.onekey.dev/v1/binance/klines?symbol=BTCUSDT&limit=10" \
  -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 Binance response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": [
    {
      "entity": {
        "date": "2026-09-28T11:00:00Z"
      },
      "market": {
        "open": 82960.01,
        "high": 83111,
        "low": 82960,
        "close": 83082.54,
        "volume": 835.88182
      },
      "ext": {
        "quoteVolume": 69399669.7551971,
        "trades": 110650
      }
    },
    {
      "entity": {
        "date": "2026-09-28T12:00:00Z"
      },
      "market": {
        "open": 83082.53,
        "high": 83631.43,
        "low": 83011.48,
        "close": 83579.75,
        "volume": 1210.60365
      },
      "ext": {
        "quoteVolume": 100953437.1295968,
        "trades": 159385
      }
    }
  ],
  "metadata": {
    "platform": "binance",
    "endpoint": "klines",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 5,
    "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
`0`	`entity.date`	`toIsoDate`
`1`	`market.open`	`toNumber`
`2`	`market.high`	`toNumber`
`3`	`market.low`	`toNumber`
`4`	`market.close`	`toNumber`
`5`	`market.volume`	`toNumber`
`7`	`ext.quoteVolume`	`toNumber`
`8`	`ext.trades`	`toNumber`

Caching and freshness#

Fresh for about 30 seconds. Repeat calls in that window are served from cache and are free.
Between 30 seconds 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 1 hour more (marked stale).
A "not found" is remembered for 1 minute 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).