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

# Update Loyalty Program Custom Fields

> ### Update Loyalty Program Custom Fields

Modify or replace the custom fields for a specific loyalty program.

- **customFields**: A list of new custom fields to be applied.
- **programId**: The unique identifier of the loyalty program.
- **Returns**: A list of updated custom fields.



## OpenAPI

````yaml https://api.loyalty.dog/openapi.json put /v2/loyalty/programs/{programId}/customFields
openapi: 3.1.0
info:
  title: LoyaltyDog
  description: >-

    Welcome to the LoyaltyDog API! This API provides access to our loyalty
    program features, allowing you to integrate with various platforms and
    manage your loyalty data.


    Want to query LoyaltyDog via an AI assistant (Claude, Cursor, Windsurf)? See
    the [MCP Integration guide](https://loyaltydog.ai/playground#mcp).
        
  termsOfService: https://loyalty.dog/loyalty-program-terms-service
  contact:
    name: LoyaltyDog Support
    url: https://loyalty.dog/contact-us
    email: support@loyalty.dog
  version: 1.0.1
servers:
  - url: https://api.loyalty.dog
    description: Production
security:
  - bearerAuth: []
paths:
  /v2/loyalty/programs/{programId}/customFields:
    put:
      tags:
        - Loyalty
      summary: Update Loyalty Program Custom Fields
      description: |-
        ### Update Loyalty Program Custom Fields

        Modify or replace the custom fields for a specific loyalty program.

        - **customFields**: A list of new custom fields to be applied.
        - **programId**: The unique identifier of the loyalty program.
        - **Returns**: A list of updated custom fields.
      operationId: >-
        update_loyalty_program_custom_fields_v2_loyalty_programs__programId__customFields_put
      parameters:
        - name: programId
          in: path
          required: true
          schema:
            anyOf:
              - $ref: '#/components/schemas/PydanticObjectId'
              - type: string
            title: Programid
        - name: authorization
          in: header
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            title: Authorization
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: array
              items:
                $ref: '#/components/schemas/TemplatePlaceholder'
              title: Customfields
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    PydanticObjectId:
      type: string
      maxLength: 24
      minLength: 24
      pattern: ^[0-9a-f]{24}$
      example: 5eb7cf5a86d9755df3a6c593
    TemplatePlaceholder:
      properties:
        name:
          type: string
          title: Name
        type:
          $ref: '#/components/schemas/TemplatePlaceholderType'
          default: text
        displayName:
          anyOf:
            - type: string
            - type: 'null'
          title: Displayname
        defaultValue:
          anyOf:
            - type: string
            - type: 'null'
          title: Defaultvalue
        points:
          anyOf:
            - type: integer
            - type: 'null'
          title: Points
        options:
          anyOf:
            - type: string
            - type: 'null'
          title: Options
        required:
          anyOf:
            - type: boolean
            - type: 'null'
          title: Required
      type: object
      required:
        - name
      title: TemplatePlaceholder
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    TemplatePlaceholderType:
      type: string
      enum:
        - text
        - email
        - number
        - date
        - selection
        - json
      title: TemplatePlaceholderType
    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:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT access token obtained from POST /v2/token.

````