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

# Get Columns

> The column catalog. ``?include=values`` embeds multiselect vocabularies.

The bulk form exists so a client can warm every filter picker in one request
instead of one request per column (issue #39): ~35 calls into a per-key rate
budget was 429ing the count/insights requests users were waiting on.



## OpenAPI

````yaml /api-reference/v2/contact-openapi.json get /columns
openapi: 3.1.0
info:
  title: RevenueBase Velocity API
  version: 0.1.0
servers:
  - url: https://api.revenuebase.ai/v2/contact
    description: Production
security: []
paths:
  /columns:
    get:
      summary: Get Columns
      description: >-
        The column catalog. ``?include=values`` embeds multiselect vocabularies.


        The bulk form exists so a client can warm every filter picker in one
        request

        instead of one request per column (issue #39): ~35 calls into a per-key
        rate

        budget was 429ing the count/insights requests users were waiting on.
      operationId: get_columns_v1_columns_get
      parameters:
        - name: include
          in: query
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            title: Include
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
                title: Response Get Columns V1 Columns Get
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
        - APIKeyHeader: []
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: X-Key

````