curl --request GET \
  --url https://test.deribit.com/api/v2/public/get_apr_history \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "public/get_apr_history",
  "params": {
    "currency": "steth",
    "limit": 5
  }
}
'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "data": [
      {
        "day": 20200,
        "apr": 2.814
      },
      {
        "day": 20199,
        "apr": 2.749
      },
      {
        "day": 20198,
        "apr": 2.684
      },
      {
        "day": 20197,
        "apr": 2.667
      },
      {
        "day": 20196,
        "apr": 2.722
      }
    ],
    "continuation": 20196
  }
}