> ## Documentation Index > Fetch the complete documentation index at: https://docs.omneo.io/llms.txt > Use this file to discover all available pages before exploring further. # Add Questionnaire Question > A `POST` to the `/questionnaires/{questionnaireId}/questions` endpoint allows your application to assign a question to a questionnaire. Returns the FULL parent Questionnaire (same shape as POST /questionnaires) so the client can refresh its view of every page/slot in one round-trip. ## OpenAPI ````yaml post /v3/questionnaires/{questionnaire}/questions openapi: 3.1.0 info: title: Omneo version: 0.0.1 servers: - url: https://api.{tenant}.getomneo.com/api variables: tenant: default: example security: [] paths: /v3/questionnaires/{questionnaire}/questions: post: tags: - Questionnaire Question summary: Add Questionnaire Question description: >- A `POST` to the `/questionnaires/{questionnaireId}/questions` endpoint allows your application to assign a question to a questionnaire. Returns the FULL parent Questionnaire (same shape as POST /questionnaires) so the client can refresh its view of every page/slot in one round-trip. operationId: questionnaires.questions.store parameters: - name: questionnaire in: path required: true description: The questionnaire ID schema: type: integer requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/StoreQuestionnaireQuestion' responses: '201': description: '`Questionnaire`' content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/Questionnaire' required: - data '401': $ref: '#/components/responses/AuthenticationException' '403': $ref: '#/components/responses/AuthorizationException' '404': $ref: '#/components/responses/ModelNotFoundException' '422': $ref: '#/components/responses/ValidationException' components: schemas: StoreQuestionnaireQuestion: type: object properties: question_id: type: integer question_version_id: type: - integer - 'null' questionnaire_page_id: type: - integer - 'null' mapping_key: type: string pattern: ^[a-z0-9_]+$ maxLength: 255 sort_order: type: integer minimum: 0 is_required: type: boolean visibility_condition: type: - array - 'null' items: type: string is_active: type: boolean required: - question_id - mapping_key title: StoreQuestionnaireQuestion Questionnaire: type: object properties: id: type: integer name: type: string handle: type: - string - 'null' description: type: - string - 'null' questionnaireable_type: type: - string - 'null' questionnaireable_id: type: - string - 'null' profile_id: type: - string - 'null' purpose: type: string is_active: type: boolean meta: type: - array - 'null' items: {} pages: type: array items: $ref: '#/components/schemas/QuestionnairePage' created_at: type: string updated_at: type: string required: - id - name - handle - description - questionnaireable_type - questionnaireable_id - profile_id - purpose - is_active - meta - created_at - updated_at title: Questionnaire QuestionnairePage: type: object properties: id: type: integer questionnaire_version_id: type: integer sort_order: type: integer title: type: - string - 'null' description: type: - string - 'null' image_url: type: - string - 'null' section_header: type: - string - 'null' questions: type: array items: $ref: '#/components/schemas/QuestionnaireQuestion' created_at: type: string updated_at: type: string required: - id - questionnaire_version_id - sort_order - title - description - image_url - section_header - created_at - updated_at title: QuestionnairePage QuestionnaireQuestion: type: object properties: id: type: integer questionnaire_question_id: type: integer questionnaire_id: type: string questionnaire_page_id: type: - integer - 'null' question_id: type: integer question_version_id: type: integer mapping_key: type: string sort_order: type: integer is_required: type: boolean visibility_condition: type: - array - 'null' items: {} visibility_dependencies: type: array items: {} is_active: type: boolean question: type: - object - 'null' properties: id: type: string handle: type: string name: type: string link_type: type: string link_target: type: string link_write_policy: type: string required: - id - handle - name - link_type - link_target - link_write_policy version: type: - object - 'null' properties: id: type: string version: type: string label: type: string description: type: string help_text: type: string icon: type: string image_url: type: string type: type: string options: type: string validation: type: string default_value: type: string required: - id - version - label - description - help_text - icon - image_url - type - options - validation - default_value created_at: type: string updated_at: type: string required: - id - questionnaire_question_id - questionnaire_id - questionnaire_page_id - question_id - question_version_id - mapping_key - sort_order - is_required - visibility_condition - visibility_dependencies - is_active - question - version - created_at - updated_at title: QuestionnaireQuestion responses: AuthenticationException: description: Unauthenticated content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message AuthorizationException: description: Authorization error content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message ModelNotFoundException: description: Not found content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message ValidationException: description: Validation error content: application/json: schema: type: object properties: message: type: string description: Errors overview. errors: type: object description: A detailed description of each field that failed validation. additionalProperties: type: array items: type: string required: - message - errors ````