getRecentPrioritizationFees

curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getRecentPrioritizationFees",
  "params": [
    [
      "CxELquR1gPP8wHe33gZ4QxqGB3sZ9RSwsJ2KshVewkFY"
    ]
  ]
}
'

{
  "jsonrpc": "2.0",
  "id": "1",
  "result": [
    {
      "slot": 348125,
      "prioritizationFee": 1234
    }
  ]
}