curl --request POST \
  --url https://beaconcha.in/api/v2/ethereum/sync-committee/validators \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "chain": "mainnet",
  "sync_committee_period": "latest",
  "cursor": "",
  "page_size": 10,
  "validator": {
    "validator_identifiers": [
      1
    ]
  }
}
'

{
  "data": [
    {
      "validator": {
        "index": 1,
        "public_key": "<string>"
      },
      "duties": {
        "successful": 1,
        "assigned": 1,
        "missed": 1,
        "scheduled": 1
      }
    }
  ],
  "range": {
    "slot": {
      "start": 1,
      "end": 1
    },
    "epoch": {
      "start": 1,
      "end": 1
    },
    "timestamp": {
      "start": 1,
      "end": 1
    }
  },
  "paging": {
    "next_cursor": "<string>"
  }
}