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

# Update subscription custom fields

> Developer API operation for PATCH /dev/v1/subscriptions/{id}/custom-fields.



## OpenAPI

````yaml /openapi.json patch /dev/v1/subscriptions/{id}/custom-fields
openapi: 3.0.3
info:
  title: Shoppex Developer API
  description: Mintlify-compatible Developer API reference for Shoppex.
  version: 1.0.0
  contact:
    name: Shoppex Support
    email: support@shoppex.io
    url: https://shoppex.io
servers:
  - url: https://api.shoppex.io
security:
  - bearerAuth: []
paths:
  /dev/v1/subscriptions/{id}/custom-fields:
    patch:
      tags:
        - Subscriptions
      summary: Update subscription custom fields
      description: >-
        Developer API operation for PATCH
        /dev/v1/subscriptions/{id}/custom-fields.
      operationId: patchDevV1SubscriptionsByIdCustom-fields
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                custom_fields:
                  type: object
                  additionalProperties:
                    type: string
                    maxLength: 500
              additionalProperties: true
      responses:
        '200':
          description: Response for status 200
          content:
            application/json:
              schema:
                type: object
                required:
                  - data
                properties:
                  data:
                    type: object
                    properties:
                      custom_fields:
                        type: object
                        additionalProperties: true
                    additionalProperties: true
                additionalProperties: true
        '400':
          description: Response for status 400
          content:
            application/json:
              schema:
                type: object
                required:
                  - status
                  - data
                  - error
                  - message
                  - log
                  - env
                properties:
                  status:
                    type: integer
                  data:
                    nullable: true
                  error:
                    type: string
                  message:
                    type: string
                    nullable: true
                  log:
                    nullable: true
                  env:
                    type: string
                additionalProperties: true
        '401':
          description: Response for status 401
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - code
                      - message
                      - doc_url
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      doc_url:
                        type: string
                      details:
                        type: array
                        items:
                          type: object
                          required:
                            - field
                            - message
                          properties:
                            field:
                              type: string
                            message:
                              type: string
                          additionalProperties: true
                      subcode:
                        type: string
                    additionalProperties: true
                additionalProperties: true
        '403':
          description: Response for status 403
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - code
                      - message
                      - doc_url
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      doc_url:
                        type: string
                      details:
                        type: array
                        items:
                          type: object
                          required:
                            - field
                            - message
                          properties:
                            field:
                              type: string
                            message:
                              type: string
                          additionalProperties: true
                      subcode:
                        type: string
                    additionalProperties: true
                additionalProperties: true
        '404':
          description: Response for status 404
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - code
                      - message
                      - doc_url
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      doc_url:
                        type: string
                      details:
                        type: array
                        items:
                          type: object
                          required:
                            - field
                            - message
                          properties:
                            field:
                              type: string
                            message:
                              type: string
                          additionalProperties: true
                      subcode:
                        type: string
                    additionalProperties: true
                additionalProperties: true
        '422':
          description: Response for status 422
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - code
                      - message
                      - doc_url
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      doc_url:
                        type: string
                      details:
                        type: array
                        items:
                          type: object
                          required:
                            - field
                            - message
                          properties:
                            field:
                              type: string
                            message:
                              type: string
                          additionalProperties: true
                      subcode:
                        type: string
                    additionalProperties: true
                additionalProperties: true
        '429':
          description: Response for status 429
          content:
            application/json:
              schema:
                type: object
                required:
                  - error
                properties:
                  error:
                    type: object
                    required:
                      - code
                      - message
                      - doc_url
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                      doc_url:
                        type: string
                      details:
                        type: array
                        items:
                          type: object
                          required:
                            - field
                            - message
                          properties:
                            field:
                              type: string
                            message:
                              type: string
                          additionalProperties: true
                      subcode:
                        type: string
                    additionalProperties: true
                additionalProperties: true
        '500':
          description: Response for status 500
          content:
            application/json:
              schema:
                anyOf:
                  - type: object
                    required:
                      - error
                    properties:
                      error:
                        type: object
                        required:
                          - code
                          - message
                          - doc_url
                        properties:
                          code:
                            type: string
                          message:
                            type: string
                          doc_url:
                            type: string
                          details:
                            type: array
                            items:
                              type: object
                              required:
                                - field
                                - message
                              properties:
                                field:
                                  type: string
                                message:
                                  type: string
                              additionalProperties: true
                          subcode:
                            type: string
                        additionalProperties: true
                    additionalProperties: true
                  - type: object
                    required:
                      - status
                      - data
                      - error
                      - message
                      - log
                      - env
                    properties:
                      status:
                        type: integer
                      data:
                        nullable: true
                      error:
                        type: string
                      message:
                        type: string
                        nullable: true
                      log:
                        nullable: true
                      env:
                        type: string
                    additionalProperties: true
      deprecated: false
      security:
        - bearerAuth: []
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: Use your Shoppex API key in the Authorization header.

````