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

# Get distinct values of a field

> Returns up to 1,000 unique values for a field.



## OpenAPI

````yaml /api-reference/ai-collection/swagger.yml get /v1/collections/{collection_id}/data/distinct
openapi: 3.0.3
info:
  version: 1.0.0
  title: Collections API
  description: |
    Public REST API for the Prisme.ai Collections workspace: named collections
    of structured records with typed schemas, MongoDB-style querying,
    aggregations, and an MCP (JSON-RPC 2.0) endpoint for AI agents.

    Records are isolated per owner (user or agent); a collection can be shared
    with additional agents through its `agent_ids` list. Every write emits an
    audit event.
  contact:
    name: Prisme.ai
    url: https://prisme.ai
servers:
  - url: https://{host}/v2/workspaces/slug:ai-collection-v3/webhooks
    description: Prisme.ai workspace webhooks
    variables:
      host:
        default: api.studio.prisme.ai
        description: API host (override for self-hosted or sandbox)
security:
  - BearerAuth: []
  - OrgApiKeyAuth: []
tags:
  - name: Collections
    description: Create, list, read, update, and delete collections (metadata and schema).
  - name: Records
    description: Insert, query, read, update, upsert, and delete records in a collection.
  - name: Analytics
    description: Count, distinct values, and aggregations (sum, avg, count with grouping).
  - name: MCP
    description: >-
      JSON-RPC 2.0 endpoint exposing the `data_*` tools to AI agents and MCP
      clients.
paths:
  /v1/collections/{collection_id}/data/distinct:
    parameters:
      - $ref: '#/components/parameters/CollectionId'
    get:
      tags:
        - Analytics
      summary: Get distinct values of a field
      description: Returns up to 1,000 unique values for a field.
      operationId: distinctValues
      parameters:
        - name: field
          in: query
          required: true
          schema:
            type: string
          example: category
        - name: filter
          in: query
          required: false
          description: JSON-encoded MongoDB-style filter.
          schema:
            type: string
      responses:
        '200':
          description: Distinct values.
          content:
            application/json:
              schema:
                type: object
                properties:
                  field:
                    type: string
                  count:
                    type: integer
                  values:
                    type: array
                    items: {}
        '404':
          $ref: '#/components/responses/NotFound'
components:
  parameters:
    CollectionId:
      name: collection_id
      in: path
      required: true
      schema:
        type: string
        format: uuid
      description: Collection identifier returned at creation.
  responses:
    NotFound:
      description: Collection or record not found, or the caller has no access to it.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
          example: InvalidArguments
        message:
          type: string
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'User session JWT. Send as `Authorization: Bearer <token>`.'
    OrgApiKeyAuth:
      type: apiKey
      in: header
      name: x-prismeai-api-key
      description: Organization-scoped API key.

````