Composition data

What is this endpoint for?

This endpoint retrieves the historical compositions of our crypto Reference Rates, determined by our periodic rate rebalances. You can learn more about our Reference Rates here.

Endpoint

https://us.market-api.kaiko.io/v2/data/index.v1/digital_asset_rates_compo

Request parameters

Parameter	Required	Description	Example
index_code	Yes	The desired rate ticker	KK_BRR_BTCUSD
start_time	No	Starting time in ISO 8601 (inclusive).	2023-01-25T00:00:00.000Z
end_time	No	Ending time in ISO 8601 (exclusive).	2023-04-25T00:00:00.000Z

Response Fields

Field	Description
index_code	The ticker of the rate
start_period	Start of the composition period
end_period	End of the composition period
exchanges	Exchanges used during the composition period **
window_seconds	Calculation window in seconds for the period
partition_seconds	Partition size in seconds for the period
result	Status of the query

** These are the exchanges that constitute the eligible universe of trading venues for the queried rate and time.

For each publication of a rate, the methodology will use trade data from these source exchanges based on actual trading activity.

Being listed as a source exchange does not guarantee that trades from exchange will be included in any given rate calculation. For the specific exchanges used for each publication, use the replication data endpoint.

Request example

cURL

curl -H "X-Api-Key: $KAIKO_API_KEY" \
     -H 'Accept: application/json' \
    "https://us.market-api.kaiko.io/v2/data/index.v1/digital_asset_rates_compo?index_code=KK_BRR_BTCUSD&start_time=2025-06-01T00:00:00Z"

Response example

JSON

{
  "query": {
    "data_version": "v1",
    "request_time": "2025-09-22T12:39:25.097Z",
    "start_time": "2025-02-01T00:00:00Z",
    "end_time": "2025-04-01T00:00:00Z"
  },
  "time": "2025-09-22T12:39:25.107Z",
  "timestamp": 1758544765107,
  "data": [
    {
      "index_code": "KK_BRR_BTCUSD",
      "start_period": "2025-03-24T21:04:22.523Z",
      "end_period": "2025-06-23T21:06:13.244716Z",
      "exchanges": [
        "cbse",
        "gmni",
        "krkn",
        "lmax",
        "stmp"
      ],
      "window_seconds": 15,
      "partition_seconds": 3
    },
    {
      "index_code": "KK_BRR_BTCUSD",
      "start_period": "2025-01-07T22:00:58.271494Z",
      "end_period": "2025-03-24T21:29:22.526544Z",
      "exchanges": [
        "cbse",
        "gmni",
        "krkn",
        "lmax",
        "stmp"
      ],
      "window_seconds": 15,
      "partition_seconds": 3
    },
    {
      "index_code": "KK_BRR_ETHUSD",
      "start_period": "2025-03-24T21:04:22.523Z",
      "end_period": "2025-06-23T21:06:13.244716Z",
      "exchanges": [
        "cbse",
        "crco",
        "krkn",
        "lmax",
        "stmp"
      ],
      "window_seconds": 15,
      "partition_seconds": 3
    },
    {
      "index_code": "KK_BRR_ETHUSD",
      "start_period": "2025-01-07T22:00:58.271494Z",
      "end_period": "2025-03-24T21:29:22.526544Z",
      "exchanges": [
        "cbse",
        "crco",
        "krkn",
        "lmax",
        "stmp"
      ],
      "window_seconds": 15,
      "partition_seconds": 3
    }
  ],
  "result": "success"
}