> ## Documentation Index > Fetch the complete documentation index at: https://docs.nudj.cx/llms.txt > Use this file to discover all available pages before exploring further. # Get variable config by ID > Retrieve a variable config by its ID. ## OpenAPI ````yaml /openapi/admin.json get /variables/{variableConfigId} openapi: 3.1.0 info: title: Nudj Admin API version: 1.0.0 servers: - url: https://{subdomain}.nudj.cx/api/v2/admin description: Organization API Server variables: subdomain: description: Your organization's subdomain (required) default: your-org security: - ApiToken: [] paths: /variables/{variableConfigId}: get: tags: - Variable summary: Get variable config by ID description: Retrieve a variable config by its ID. operationId: getVariableConfigById parameters: - in: path name: variableConfigId schema: type: string required: true responses: '200': description: Successful response content: application/json: schema: $ref: '#/components/schemas/VariableConfig' '400': description: Invalid input data content: application/json: schema: $ref: '#/components/schemas/error.BAD_REQUEST' '404': description: Not found content: application/json: schema: $ref: '#/components/schemas/error.NOT_FOUND' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/error.INTERNAL_SERVER_ERROR' components: schemas: VariableConfig: type: object properties: id: type: string pattern: ^[0-9a-fA-F]{24}$ description: The id of the variable config organisationId: type: string pattern: ^[0-9a-fA-F]{24}$ description: The organisation that the variable config belongs to type: type: string enum: - form-short-text - form-long-text - form-number - form-select - form-checkbox - form-email - form-name - form-address - form-date description: >- Determines how the variable should be rendered in the UI (e.g., text input, select dropdown, date picker, etc.) name: type: string description: The name of the variable label: type: string description: The label of the variable placeholder: type: - string - 'null' description: The placeholder text useDefaultProfileValue: type: boolean description: Whether to use the default profile value availableInQuestionBank: type: boolean description: Whether this variable is available in the question bank maxValueOccurrences: type: number minimum: 1 description: >- The maximum number of times a unique value can be used across all instances of this variable isSingleOutputPerUser: type: boolean description: Whether a user can only have one output for this variable isImmutable: type: boolean description: Whether the value, once set by a user, cannot be changed prerequisiteVariableConfigIds: type: - array - 'null' items: type: string pattern: ^[0-9a-fA-F]{24}$ description: The variable configs that must be completed before this one options: type: - array - 'null' items: type: object properties: key: type: string value: type: string required: - key - value description: >- An array of predefined values that users can choose from when the type is set to select validationRegex: type: - string - 'null' description: >- Regular expression pattern to validate variable values. If set, values must match this pattern. validationEndpointConfig: type: - object - 'null' properties: url: type: string format: uri method: type: string headers: type: - object - 'null' additionalProperties: type: string required: - url - method description: Configuration for validating variable values createdAt: type: string description: The date when this variable config was created createdBy: type: string pattern: ^[0-9a-fA-F]{24}$ description: The user who created this variable config updatedAt: type: - string - 'null' description: The date when this variable config was last updated updatedBy: type: - string - 'null' pattern: ^[0-9a-fA-F]{24}$ description: The user who last updated this variable config required: - id - organisationId - type - name - label - useDefaultProfileValue - availableInQuestionBank - maxValueOccurrences - isSingleOutputPerUser - isImmutable - createdAt - createdBy title: Variable Config description: A variable configuration error.BAD_REQUEST: type: object properties: message: type: string description: The error message example: Invalid input data code: type: string description: The error code example: BAD_REQUEST issues: type: array items: type: object properties: message: type: string required: - message description: An array of issues that were responsible for the error example: [] required: - message - code title: Error description: The error information example: code: BAD_REQUEST message: Invalid input data issues: [] error.NOT_FOUND: type: object properties: message: type: string description: The error message example: Not found code: type: string description: The error code example: NOT_FOUND issues: type: array items: type: object properties: message: type: string required: - message description: An array of issues that were responsible for the error example: [] required: - message - code title: Error description: The error information example: code: NOT_FOUND message: Not found issues: [] error.INTERNAL_SERVER_ERROR: type: object properties: message: type: string description: The error message example: Internal server error code: type: string description: The error code example: INTERNAL_SERVER_ERROR issues: type: array items: type: object properties: message: type: string required: - message description: An array of issues that were responsible for the error example: [] required: - message - code title: Error description: The error information example: code: INTERNAL_SERVER_ERROR message: Internal server error issues: [] securitySchemes: ApiToken: type: apiKey in: header name: x-api-token ````