> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bigdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get filter values

> Retrieve every value a category filter can take, so a filter can be built without guessing its values. Values are returned in the exact form the corresponding search filter accepts: countries as ISO 3166-1 alpha-2 codes, source ranks as `RANK_1`..`RANK_5`, and so on.

The full sorted list is returned; there is no narrowing parameter, and lists are capped at 5000 values.

Every filter of every category is available except three on `sources`, which are stored in a way that cannot be enumerated and return 404: `packages`, `categories` and `tiers`.



## OpenAPI

````yaml /api-rest/openapi/openapi_knowledge_graph.json get /v1/knowledge-graph/{category}/values/{filter}
openapi: 3.0.3
info:
  title: Bigdata Knowledge Graph API
  version: 1.0.0
  description: >-
    Access structured data from the Knowledge Graph to find companies, people,
    places, and other entities with detailed information.
servers:
  - url: https://api.bigdata.com/
    description: Production server
security:
  - ApiKeyAuth: []
paths:
  /v1/knowledge-graph/{category}/values/{filter}:
    get:
      tags:
        - Filter values
      summary: Get filter values
      description: >-
        Retrieve every value a category filter can take, so a filter can be
        built without guessing its values. Values are returned in the exact form
        the corresponding search filter accepts: countries as ISO 3166-1 alpha-2
        codes, source ranks as `RANK_1`..`RANK_5`, and so on.


        The full sorted list is returned; there is no narrowing parameter, and
        lists are capped at 5000 values.


        Every filter of every category is available except three on `sources`,
        which are stored in a way that cannot be enumerated and return 404:
        `packages`, `categories` and `tiers`.
      operationId: getFilterValues
      parameters:
        - name: category
          in: path
          required: true
          description: Knowledge Graph category
          schema:
            type: string
            enum:
              - companies
              - concepts
              - etfs
              - organizations
              - people
              - places
              - products
              - sources
              - topics
          example: places
        - name: filter
          in: path
          required: true
          description: >-
            Name of the filter to list values for, as it appears in that
            category's request body (e.g. `countries` for places, `ranks` for
            sources, `statuses` for ETFs)
          schema:
            type: string
          example: continents
      responses:
        '200':
          description: Successful response with the values available for that filter
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FilterValuesResponse'
        '404':
          description: >-
            Unknown category, unknown filter for that category, or a filter
            whose values cannot be enumerated
components:
  schemas:
    FilterValuesResponse:
      type: object
      properties:
        values:
          type: array
          items:
            type: string
          description: Every value the filter accepts, sorted
          example:
            - Africa
            - Antarctica
            - Asia
            - Europe
            - North America
            - Oceania
            - South America
        metadata:
          type: object
          properties:
            request_id:
              type: string
              description: Unique request identifier
              example: 18f8fbd1-fa1d-4c67-9dd5-a2434ce1a6b5
            timestamp:
              type: string
              format: date-time
              description: Response timestamp
              example: '2025-10-08T06:35:46.901505+00:00'
          required:
            - request_id
            - timestamp
      required:
        - values
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-KEY

````