curl --request GET \
  --url https://api.sixtyfour.ai/search/filter-capabilities

{
  "index_name": "<string>",
  "fields": [
    {
      "field": "<string>",
      "field_type": "<string>",
      "queryable": true,
      "sortable": true,
      "rangeable": true,
      "value_type": "<string>",
      "supports_top_values": true,
      "supports_exact_filter_snippet": true,
      "nested_path": "<string>",
      "sort_field": "<string>",
      "aggregation_field": "<string>",
      "related_fields": [
        "<string>"
      ],
      "preferred_for_exact_match": false
    }
  ],
  "nested_paths": [
    "<string>"
  ],
  "limits": {
    "max_query_depth": 123,
    "max_clause_count": 123,
    "max_terms_per_clause": 123,
    "max_sort_clauses": 123,
    "max_string_length": 123
  },
  "cache_ttl_seconds": 123,
  "generated_at_epoch_ms": 123,
  "mode": "company",
  "mapping_hash": "<string>",
  "simple_query_operators": [
    "<string>"
  ]
}