# Mark message as read by agent (deprecated)

Deprecated. Use Mark a conversation as read (v2), which clears the unread badge and sends the read receipt for the participant in one call. Retained for existing integrations.

Mark a specific message as read by the agent (sends read receipt to customer).

Endpoint: POST /pl4chat-service/Message/markReadByAgent
Version: 3.0.0
Security: apikeyAuth

## Query parameters:

  - `messageId` (string, required)
    The ID of the message to mark as read.
    Example: "a1b2c3d4-e5f6-7890-a1b2-c3d4e5f67890"

## Response 401 fields (application/json):

  - `status` (string)
    Example: "ERROR"

  - `message` (string)
    Example: "Unauthorized user"

  - `requestId` (string)
    Example: "c3a1f8e2-4b6d-11ee-be56-0242ac120002"

  - `timestamp` (string)
    Example: "2026-01-15T10:30:00Z"


## Response 200 fields