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

# Set a custom attribute value



## OpenAPI

````yaml /api-reference/support-openapi.json post /api/custom-attributes/values/set
openapi: 3.1.0
info:
  title: Clarity Support API
  version: '1.0'
  description: Tickets, customers, messages, the knowledge base, and webhooks.
servers:
  - url: https://back.leap.onclarity.com
security:
  - organizationApiKey: []
tags:
  - name: AI service
    description: >-
      Hand a customer conversation to your Clarity AI agent from your own app or
      backend.
  - name: Messages
    description: Reply to customers on their ticket's channel and add private notes.
  - name: Customers
    description: Create, update, and look up customers and their custom attributes.
  - name: Tickets
    description: >-
      Change a ticket's status, assignee, category, and tags, and list the
      values they take.
  - name: Knowledge base
    description: Manage the articles your AI agents answer from.
  - name: Webhooks
    description: Subscribe your endpoints to events in your organization.
paths:
  /api/custom-attributes/values/set:
    post:
      tags:
        - Customers
      summary: Set a custom attribute value
      operationId: ApiCustomAttributesValuesSetSetValue
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomAttributeValueSetSchema'
        required: true
      responses:
        '200':
          description: Request fulfilled, document follows
          headers: {}
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomAttributeValuesPayload'
        '400':
          description: Bad request syntax or unsupported method
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/KTSErrorResponse'
        '500':
          description: Server got itself in trouble
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/KTSErrorResponse'
      deprecated: false
components:
  schemas:
    CustomAttributeValueSetSchema:
      properties:
        object_type:
          $ref: '#/components/schemas/CustomAttributeObjectType'
        object_id:
          type: integer
        key:
          type: string
        value:
          oneOf:
            - {}
            - type: 'null'
      type: object
      required:
        - key
        - object_id
        - object_type
      title: CustomAttributeValueSetSchema
    CustomAttributeValuesPayload:
      properties:
        values:
          additionalProperties: {}
          type: object
        meta:
          additionalProperties:
            type: object
          type: object
          default: {}
      type: object
      required:
        - values
      title: CustomAttributeValuesPayload
    KTSErrorResponse:
      properties:
        status:
          type: string
          default: error
        code:
          type: string
        message:
          oneOf:
            - type: string
            - type: 'null'
        extra:
          oneOf:
            - additionalProperties: {}
              type: object
            - items: {}
              type: array
            - type: 'null'
      type: object
      required:
        - code
      title: KTSErrorResponse
    CustomAttributeObjectType:
      type: string
      enum:
        - ticket
        - contact
      title: CustomAttributeObjectType
  securitySchemes:
    organizationApiKey:
      type: http
      scheme: bearer
      description: >-
        Your organization API key (it starts with `anek_org_`). The same key
        works on the Voice API and the Support API. See
        [Authentication](/authentication).

````

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