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

# Add Item To List

> Add an entity to a list



## OpenAPI

````yaml post /lists/{list_id}/items
openapi: 3.1.0
info:
  title: Registercheck API
  version: 1.0.0
servers:
  - url: https://jobs-api.registercheck.de/api/v2
security: []
paths:
  /lists/{list_id}/items:
    post:
      tags:
        - Lists
      summary: Add Item To List
      description: Add an entity to a list
      operationId: add_item_to_list_lists__list_id__items_post
      parameters:
        - name: list_id
          in: path
          required: true
          schema:
            type: string
            title: List Id
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ListItemBase'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListItemResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
        - HTTPBearer: []
components:
  schemas:
    ListItemBase:
      properties:
        entity_id:
          type: string
          title: Entity Id
          description: ID of the entity (company or person)
        entity_name:
          type: string
          title: Entity Name
          description: Name of the entity
        is_company:
          type: boolean
          title: Is Company
          description: Whether the entity is a company (True) or person (False)
          default: true
        register_number:
          anyOf:
            - type: string
            - type: 'null'
          title: Register Number
          description: Company register number (for companies)
        birth_date:
          anyOf:
            - type: string
            - type: 'null'
          title: Birth Date
          description: Birth date (for persons)
        notes:
          anyOf:
            - type: string
            - type: 'null'
          title: Notes
          description: Additional notes about the entity
      type: object
      required:
        - entity_id
        - entity_name
      title: ListItemBase
      description: Base model for list item data
    ListItemResponse:
      properties:
        entity_id:
          type: string
          title: Entity Id
          description: ID of the entity (company or person)
        entity_name:
          type: string
          title: Entity Name
          description: Name of the entity
        is_company:
          type: boolean
          title: Is Company
          description: Whether the entity is a company (True) or person (False)
          default: true
        register_number:
          anyOf:
            - type: string
            - type: 'null'
          title: Register Number
          description: Company register number (for companies)
        birth_date:
          anyOf:
            - type: string
            - type: 'null'
          title: Birth Date
          description: Birth date (for persons)
        notes:
          anyOf:
            - type: string
            - type: 'null'
          title: Notes
          description: Additional notes about the entity
        id:
          type: string
          title: Id
          description: Unique identifier for the list item
        created_at:
          type: string
          title: Created At
          description: ISO timestamp when the item was created
        updated_at:
          type: string
          title: Updated At
          description: ISO timestamp when the item was last updated
        watchlist_subscription_id:
          anyOf:
            - type: string
            - type: 'null'
          title: Watchlist Subscription Id
          description: ID of associated watchlist subscription if applicable
      type: object
      required:
        - entity_id
        - entity_name
        - id
        - created_at
        - updated_at
      title: ListItemResponse
      description: Response model for a list item with metadata
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    HTTPBearer:
      type: http
      description: Enter your API key
      scheme: bearer

````