getVoteAccounts

curl --request POST \
  --url https://mainnet.helius-rpc.com/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getVoteAccounts",
  "params": [
    {
      "votePubkey": "3ZT31jkAGhUaw8jsy4bTknwBMP8i4Eueh52By4zXcsVw"
    }
  ]
}'

{
  "jsonrpc": "2.0",
  "id": "1",
  "result": {
    "current": [
      {
        "votePubkey": "3ZT31jkAGhUaw8jsy4bTknwBMP8i4Eueh52By4zXcsVw",
        "nodePubkey": "B97CCUW3AEZFGy6uUg6zUdnNYvnVq5VG8PUtb2HayTDD",
        "activatedStake": 42,
        "epochVoteAccount": true,
        "commission": 0,
        "lastVote": 147,
        "epochCredits": [
          [
            1,
            64,
            0
          ],
          [
            2,
            192,
            64
          ]
        ],
        "rootSlot": 42
      }
    ],
    "delinquent": []
  }
}