curl --request GET \
  --url https://app.teable.ai/api/table/%7BtableId%7D/aggregation \
  --header 'Authorization: Bearer REPLACE_BEARER_TOKEN'

[
  {
    "aggregations": [
      {
        "fieldId": "<string>",
        "total": {
          "value": "<string>",
          "aggFunc": "count"
        },
        "group": {}
      }
    ]
  }
]