24h Volume—Open Interest—24h Liquidations$1.36B24h Long/Short—BTC Dominance—ETH Dominance—
App
Language ▾
$ USD ▾
/api/p3/klines
GETAvailable

Hourly candles

Hourly candles (aggregable via stepH; used as heatmap overlay)

GET/api/p3/klines

Request

Query parameters

NameTypeRequiredDefaultAllowed valuesDescription
symbolstringOptionalBTC—Coin symbol. Example: BTC
hoursintegerOptional24≤ 840Look-back window in hours. Example: 24
stepHintegerOptional1≥ 1 · ≤ 24Aggregation step in hours. Example: 1

Example request

curl -s "https://www.coinboss.com/api/p3/klines?symbol=BTC&hours=24&stepH=1"

Response fields

The field table is generated from real responses, so it lists exactly what the endpoint returns. Paths use a[] for array items and {*} for objects keyed by a dynamic name such as a coin or an exchange.

FieldTypeUnitDescription
successboolean—true when the request succeeded. On failure the body is `{ success: false, code, error, request_id }`.
symbolstring—Instrument symbol as normalised by CoinBoss (for example BTCUSDT).
candlesarray—Candles: [time, open, high, low, close, volume].
candles[]array—Candles: [time, open, high, low, close, volume].
candles[][]number—Candles: [time, open, high, low, close, volume].

Generated 2026-11-11 23:00 UTC from 4 real responses.

Example response

/api/p3/klines?symbol=BTC&hours=24&stepH=1 · Real response captured 2026-11-13 03:57:33 UTC. Long arrays and maps are shortened for display: candles had 24 items.

  • {
    • "success": true,
    • "symbol": "BTC",
    • "candles": [
      • [ … 5 ],
      • [ … 5 ]
      ]
    }

Verified samples

Besides the example above, the probe calls this endpoint with these parameters and checks the schema each time.

ParametersHTTPLatencyResult
hours=24&stepH=1&symbol=ETH2002 msPass
hours=24&stepH=1&symbol=SOL2002 msPass
hours=24&stepH=1&symbol=ARKM2002 msPass

Checked 2026-11-13 03:57:33 UTC

Details

Authentication
None. Public endpoint.
Rate limit
1200 requests per minute per IP
Server cache
60s
Edge micro-cache
10s
Update frequency
top 40 coins every 5 min; long-tail coins in rotation (8 coins per 30 s); latest 2 candles upserted each pass
Window
hours param, default 24, max 840; candles aggregated from 1 h klines with step 1..24 h
Data sources
Futures candlesticks collected in-house from Binance USDT-M futures klines (OKX swap candles as fallback).
Exchange coverage
about 790 coins from binance futures plus about 110 from okx
Units
candles [t, o, h, l, c]; prices in USD(T); t in Unix ms
Method
multi-hour candles aggregated from 1 h candles (open of first, max high, min low, close of last)
Timestamps
Unix epoch milliseconds (UTC) unless the field description says otherwise
Response format
json
Stability
Stable

Live status

AvailableChecked 2026-11-13 03:57:33 UTCHTTP 2002 msSchema matchesNewest data point 58m old

Availability, last 30 days

100% of 411 checks passed

Errors

Failed calls share one shape on every endpoint. The full list is on the errors page. Errors and rate limits →

CodeHTTPMeaningWhat to do
INVALID_PARAM400A required parameter is missing or a value is not accepted. `param` names the parameter when it is known.Do not retry unchanged; fix the request.
UNAUTHORIZED401The `CB-API-KEY` header was sent but the key is unknown or revoked. Public data needs no key — drop the header or use a valid key.Do not retry unchanged.
FORBIDDEN403The route is not part of the public API (internal or account-only).Do not retry.
NOT_FOUND404Unknown route, or the requested coin / exchange / fund does not exist.Do not retry; check the path and identifiers against the catalog.
RATE_LIMITED429More requests than the per-minute limit. `Retry-After` gives the seconds to wait.Wait for `Retry-After`, then retry with backoff.
INTERNAL500Unexpected server error. The message is generic by design; quote `request_id` when reporting it.Retry once after a few seconds; report it with the request id if it persists.
UPSTREAM_FAILED503The data source behind this endpoint did not answer in time. No stale or substitute numbers are returned in its place.Retry with backoff; check the status page.
UNAVAILABLE501 / 503The dataset is temporarily not ready (cache warming) or the endpoint has no lawful public source yet.Retry later; the catalog marks endpoints that are unavailable by design.
REQUEST_FAILED200Some older endpoints answer HTTP 200 with `success: false`. Always check `success`, not only the HTTP status.Depends on the message; treat as a failed request.

Try it

GET/api/p3/klinesAvailable
Parameters

string · default BTC — Coin symbol.

integer · default 24 · max 840 — Look-back window in hours.

integer · default 1 · min 1 · max 24 — Aggregation step in hours.

Request URLhttps://www.coinboss.com/api/p3/klines?symbol=BTC&hours=24&stepH=1
Choose an endpoint and press “Send request”. The response, headers and timing will appear here.