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

# Mark thread as read

> **Mark all messages in a conversation thread as read**



## OpenAPI

````yaml /public_openapi.json patch /api/public/v1/replies/threads/{thread_id}/read
openapi: 3.0.3
info:
  title: ColdSend Public API
  description: >-
    Programmatic access to ColdSend for managing cold email campaigns and sender
    accounts.
  version: 1.0.0
  contact:
    name: ColdSend Support
    email: support@coldsend.pro
    url: https://coldsend.pro
servers:
  - url: https://api.coldsend.pro
    description: Production
security:
  - ApiKeyAuth: []
paths:
  /api/public/v1/replies/threads/{thread_id}/read:
    patch:
      tags:
        - Replies
      summary: Mark thread as read
      description: '**Mark all messages in a conversation thread as read**'
      operationId: mark_thread_as_read_api_public_v1_replies_threads__thread_id__read_patch
      parameters:
        - name: thread_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            description: Thread ID
            title: Thread Id
          description: Thread ID
      responses:
        '200':
          description: Thread marked as read
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MarkAsReadResponse'
        '401':
          description: Missing or invalid API key
        '403':
          description: Insufficient permissions – requires 'replies:update' scope
        '404':
          description: Thread not found
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    MarkAsReadResponse:
      properties:
        success:
          type: boolean
          title: Success
        message:
          type: string
          title: Message
        marked_count:
          type: integer
          title: Marked Count
          description: Number of threads marked as read
        thread_ids:
          items:
            type: string
          type: array
          title: Thread Ids
          description: List of thread IDs that were marked
      type: object
      required:
        - success
        - message
        - marked_count
        - thread_ids
      title: MarkAsReadResponse
      description: Response for marking threads as read.
    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:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key with format cs_live_xxx

````