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

# Mark Conversation As Unread

> Marks the conversation as unread for the caller by moving their read position to just before the latest message. Returns 400 when the conversation has no messages. Requires the `conversations:read` permission.



## OpenAPI

````yaml put /api/v1/conversations/{uuid}/mark-unread
openapi: 3.0.0
info:
  title: libredesk API
  description: >-
    REST API documentation for libredesk helpdesk system.


    ## Authentication


    The libredesk API supports two authentication methods:


    ### 1. Basic Authentication

    Use your API key and secret with Basic authentication:

    ```

    Authorization: Basic <base64_encoded_api_key:api_secret>

    ```


    ### 2. Token Authentication  

    Use your API key and secret with token authentication:

    ```

    Authorization: token api_key:api_secret

    ```


    To obtain API credentials, generate them from your agent profile in the
    libredesk dashboard.
  version: 1.0.0
servers:
  - url: http://localhost:8080
    description: Local development server
security:
  - basicAuth: []
  - tokenAuth: []
paths:
  /api/v1/conversations/{uuid}/mark-unread:
    put:
      tags:
        - Conversations
      summary: Mark Conversation As Unread
      description: >-
        Marks the conversation as unread for the caller by moving their read
        position to just before the latest message. Returns 400 when the
        conversation has no messages. Requires the `conversations:read`
        permission.
      operationId: handleMarkConversationAsUnread
      parameters:
        - name: uuid
          in: path
          required: true
          schema:
            type: string
          description: Conversation UUID
      responses:
        '200':
          description: Conversation marked as unread
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConversationUnreadStateResponse'
        '400':
          description: Invalid request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security:
        - basicAuth: []
        - tokenAuth: []
components:
  schemas:
    ConversationUnreadStateResponse:
      type: object
      properties:
        status:
          type: string
          example: success
        data:
          $ref: '#/components/schemas/ConversationUnreadState'
    ErrorResponse:
      type: object
      description: Error response format
      properties:
        status:
          type: string
          example: error
        message:
          type: string
          description: Error message
          example: Invalid request
        data:
          nullable: true
          description: Additional error data
        error_type:
          type: string
          enum:
            - GeneralException
            - PermissionException
            - InputException
            - DataException
            - NetworkException
            - NotFoundException
            - ConflictException
            - UnauthorizedException
            - RateLimitException
    ConversationUnreadState:
      type: object
      properties:
        conversation_uuid:
          type: string
        last_seen_at:
          type: string
          format: date-time
          description: Read position of the caller, moved to just before the latest message
        read_version:
          type: integer
          format: int64
          description: >-
            Increases on every read state change. Use it to discard out-of-order
            updates.
        is_unread:
          type: boolean
          example: true
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: >-
        Basic authentication using base64 encoded API key and secret. Format:
        `Authorization: Basic <base64(api_key:api_secret)>`
    tokenAuth:
      type: apiKey
      name: Authorization
      in: header
      description: >-
        Token authentication using API key and secret. Format: `Authorization:
        token api_key:api_secret`

````

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