> ## Documentation Index > Fetch the complete documentation index at: https://docs.sixtyfour.ai/llms.txt > Use this file to discover all available pages before exploring further. # Filter Search Capabilities > Get the fields, operators, and limits supported by filter search. ## OpenAPI ````yaml https://api.sixtyfour.ai/openapi.json get /search/filter-capabilities openapi: 3.1.0 info: title: Sixtyfour API description: >- Intelligence API for People and Entities. Deploy AI agents that investigate, resolve identities, map relationships, and surface risk signals contact: name: Sixtyfour url: https://sixtyfour.ai/ email: support@sixtyfour.ai license: name: Proprietary version: 1.0.0 servers: - url: https://api.sixtyfour.ai description: Production security: [] tags: - name: Enrichment description: Find and enrich emails, phones, and LinkedIn for people and companies. - name: org-chart description: Discover people inside a company and build org charts. - name: Search description: Run deep and filter searches over Sixtyfour's data. - name: Workflow description: Create, run, and manage enrichment workflows. - name: Workflow Schedules description: Create and manage recurring schedules for workflows. - name: Account description: Manage and inspect your account and credit balance. - name: Intelligence description: Verify identity attributes such as age using high-tier OSINT research. paths: /search/filter-capabilities: get: tags: - Search summary: Filter Search Capabilities description: Get the fields, operators, and limits supported by filter search. operationId: get_filter_capabilities_endpoint_search_filter_capabilities_get parameters: - name: mode in: query required: false schema: type: string description: 'Search mode: ''company'' or ''people''.' default: company title: Mode description: 'Search mode: ''company'' or ''people''.' - name: refresh in: query required: false schema: type: boolean description: Force a mapping refresh instead of using cached capabilities. default: false title: Refresh description: Force a mapping refresh instead of using cached capabilities. - name: x-api-key in: header required: false schema: anyOf: - type: string - type: 'null' title: X-Api-Key responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/FilterSearchCapabilitiesResponse' '400': description: Request was rejected by the route's validation rules. content: application/json: schema: type: object properties: detail: type: string example: detail: Invalid request body '401': description: Missing or invalid API key. content: application/json: schema: type: object properties: detail: type: string example: detail: Invalid API key '402': description: >- Insufficient credits or no active subscription for this organization. content: application/json: schema: type: object properties: detail: type: string example: detail: Insufficient API credits '403': description: Forwarded user_id does not belong to caller's organization. content: application/json: schema: type: object properties: detail: type: string example: detail: Forwarded user_id does not belong to your organization. '404': description: Search task or export file not found. content: application/json: schema: type: object properties: detail: type: string example: detail: Search not found or has no parsed_query. '409': description: Export workflow already running for this search. content: application/json: schema: type: object properties: detail: type: string example: detail: Export workflow is already running for this search. '422': description: Request body failed validation. content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' '429': description: Rate limit exceeded. content: application/json: schema: type: object properties: detail: type: string example: detail: Rate limit exceeded '500': description: Unexpected server error. Retry with backoff. content: application/json: schema: type: object properties: detail: type: string example: detail: Internal server error '502': description: Upstream search backend returned an error. content: application/json: schema: type: object properties: detail: type: string example: detail: 'NL upstream transport error: connection reset by peer' '503': description: Search backend is not configured or unavailable. content: application/json: schema: type: object properties: detail: type: string example: detail: Company search backend endpoint is not configured '504': description: Upstream search backend timed out. content: application/json: schema: type: object properties: detail: type: string example: detail: Field values request timed out components: schemas: FilterSearchCapabilitiesResponse: properties: mode: type: string enum: - people - company title: Mode description: Search mode these capabilities apply to. default: company index_name: type: string title: Index Name description: Public dataset identifier for company direct-filter queries. fields: items: $ref: '#/components/schemas/FilterFieldCapability' type: array title: Fields description: Unified per-field capabilities sorted alphabetically. nested_paths: items: type: string type: array title: Nested Paths description: Allowed nested.path values for nested query clauses. limits: $ref: '#/components/schemas/FilterSearchLimits' cache_ttl_seconds: type: integer title: Cache Ttl Seconds description: Server cache TTL for mapping-derived capabilities. generated_at_epoch_ms: type: integer title: Generated At Epoch Ms description: Epoch timestamp (ms) when these capabilities were derived. mapping_hash: anyOf: - type: string - type: 'null' title: Mapping Hash description: Hash of mapping metadata used to derive this capability snapshot. simple_query_operators: anyOf: - items: type: string type: array - type: 'null' title: Simple Query Operators description: Supported MongoDB-style operators for simple_filters input. type: object required: - index_name - fields - nested_paths - limits - cache_ttl_seconds - generated_at_epoch_ms title: FilterSearchCapabilitiesResponse description: Response describing supported filter-search DSL capabilities. HTTPValidationError: title: HTTPValidationError type: object properties: detail: type: array items: $ref: '#/components/schemas/ValidationError' example: detail: - loc: - body - target_company - domain msg: Field required type: missing input: null ctx: {} FilterFieldCapability: properties: field: type: string title: Field description: Canonical field path. field_type: type: string title: Field Type description: Source ES mapping type (e.g. text, keyword, long). nested_path: anyOf: - type: string - type: 'null' title: Nested Path description: Nested path, if any. queryable: type: boolean title: Queryable description: Allowed in query clauses. sortable: type: boolean title: Sortable description: Allowed in sort clauses. rangeable: type: boolean title: Rangeable description: Supports range operators (gt/gte/lt/lte). sort_field: anyOf: - type: string - type: 'null' title: Sort Field description: >- Sort target when it differs from field (e.g. text fields sort via .keyword). aggregation_field: anyOf: - type: string - type: 'null' title: Aggregation Field description: Field used for terms aggregation when supports_top_values is true. value_type: type: string title: Value Type description: Aggregation target type (keyword, long, etc.). supports_top_values: type: boolean title: Supports Top Values description: Supports top-values aggregation. supports_exact_filter_snippet: type: boolean title: Supports Exact Filter Snippet description: API can return deterministic exact filter snippets. related_fields: items: type: string type: array title: Related Fields description: >- Other paths representing the same concept (e.g. flat counterpart of nested). preferred_for_exact_match: type: boolean title: Preferred For Exact Match description: >- Recommended for simple exact-match queries over its nested counterpart. default: false type: object required: - field - field_type - queryable - sortable - rangeable - value_type - supports_top_values - supports_exact_filter_snippet title: FilterFieldCapability description: Unified per-field capability descriptor for filter-search clients. FilterSearchLimits: properties: max_query_depth: type: integer title: Max Query Depth description: Maximum recursive query depth. max_clause_count: type: integer title: Max Clause Count description: Maximum total query clauses. max_terms_per_clause: type: integer title: Max Terms Per Clause description: Maximum values in terms/bool lists. max_sort_clauses: type: integer title: Max Sort Clauses description: Maximum sort clauses. max_string_length: type: integer title: Max String Length description: Maximum string length in query values. type: object required: - max_query_depth - max_clause_count - max_terms_per_clause - max_sort_clauses - max_string_length title: FilterSearchLimits description: Constraint values for guarded DSL validation. ValidationError: title: ValidationError type: object required: - loc - msg - type properties: loc: type: array items: oneOf: - type: string - type: integer description: Path to the field that failed validation. example: - body - target_company - domain msg: type: string description: Human-readable error message. example: Field required type: type: string description: Error code (e.g. 'missing', 'value_error'). example: missing input: description: The offending input value (any type, may be null). nullable: true example: null ctx: type: object description: Optional error context. additionalProperties: true example: {} ````