curl --request POST \
  --url https://api.galileo.ai/v2/projects/{project_id}/experiments/available_columns \
  --header 'Galileo-API-Key: <api-key>'

{
  "columns": [
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "uuid",
      "description": "Galileo ID of the experiment",
      "filterable": true,
      "group_label": "Standard",
      "id": "id",
      "is_empty": false,
      "is_optional": false,
      "label": "ID",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "timestamp",
      "description": "Timestamp of the experiment's creation",
      "filterable": true,
      "group_label": "Standard",
      "id": "created_at",
      "is_empty": false,
      "is_optional": false,
      "label": "Created",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "timestamp",
      "description": "Timestamp of the trace or span's last update",
      "filterable": true,
      "group_label": "Standard",
      "id": "updated_at",
      "is_empty": false,
      "is_optional": true,
      "label": "Last Updated",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "text",
      "description": "Name of the experiment",
      "filterable": true,
      "group_label": "Standard",
      "id": "name",
      "is_empty": false,
      "is_optional": false,
      "label": "Name",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "uuid",
      "description": "Galileo ID of the project associated with this experiment",
      "filterable": true,
      "group_label": "Standard",
      "id": "project_id",
      "is_empty": false,
      "is_optional": false,
      "label": "Project ID",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "floating_point",
      "filterable": true,
      "group_label": "Standard",
      "id": "ranking_score",
      "is_empty": false,
      "is_optional": true,
      "label": "Ranking Score",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "integer",
      "filterable": true,
      "group_label": "Standard",
      "id": "rank",
      "is_empty": false,
      "is_optional": true,
      "label": "Rank",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "standard",
      "complex": false,
      "data_type": "uuid",
      "filterable": true,
      "group_label": "Standard",
      "id": "playground_id",
      "is_empty": false,
      "is_optional": true,
      "label": "Playground Id",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "metric",
      "complex": false,
      "data_type": "floating_point",
      "filterable": true,
      "id": "metrics/average_cost",
      "is_empty": false,
      "is_optional": false,
      "label": "average_cost",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "metric",
      "complex": false,
      "data_type": "floating_point",
      "filterable": true,
      "id": "metrics/average_bleu",
      "is_empty": false,
      "is_optional": false,
      "label": "average_bleu",
      "multi_valued": false,
      "sortable": true
    },
    {
      "applicable_types": [],
      "category": "metric",
      "complex": false,
      "data_type": "integer",
      "filterable": true,
      "id": "metrics/total_responses",
      "is_empty": false,
      "is_optional": false,
      "label": "total_responses",
      "multi_valued": false,
      "sortable": true
    }
  ]
}