> ## Documentation Index > Fetch the complete documentation index at: https://enterprise-docs.dify.ai/llms.txt > Use this file to discover all available pages before exploring further. # Submit Message Feedback > **Available for**: Chatflow, Chatbot, Agent, Text Generator apps. Records a `like` or `dislike` rating, plus an optional comment, on a message. Submitting `null` for `rating` revokes the message's existing feedback. ## OpenAPI ````yaml /en/3.11.x/develop/api/openapi_service.json post /messages/{message_id}/feedbacks openapi: 3.0.1 info: title: Dify Service API description: >- REST API for Dify applications and knowledge bases. Application endpoints authenticate with an app API key; knowledge endpoints authenticate with a dataset API key. version: 1.0.0 servers: - url: https://{api_base_url} description: >- Base URL of the Dify Service API. Replace it with your deployment's API endpoint. variables: api_base_url: default: api.example.com/v1 description: Host and path of the API base URL, without the `https://` prefix. security: - ApiKeyAuth: [] tags: - name: Chat Messages description: Operations related to chat messages and interactions. - name: Files description: File upload and preview operations. - name: End Users description: Operations related to end user information. - name: Feedback description: User feedback operations. - name: Conversations description: Operations related to managing conversations. - name: Audio description: Text-to-Speech and Speech-to-Text operations. - name: Applications description: Operations to retrieve application settings and information. - name: Annotations description: Operations related to managing annotations for direct replies. - name: Human Input description: Endpoints for resuming paused workflows that require human input. - name: Workflow Runs description: Operations for executing and managing workflows. - name: Completion Messages description: Operations related to text generation and completion. - name: Knowledge Bases description: >- Operations for managing knowledge bases, including creation, configuration, and retrieval. - name: Documents description: >- Operations for creating, updating, and managing documents within a knowledge base. - name: Chunks description: Operations for managing document chunks and child chunks. - name: Metadata description: >- Operations for managing knowledge base metadata fields and document metadata values. - name: Tags description: Operations for managing knowledge base tags and tag bindings. - name: Models description: Operations for retrieving available models. - name: Knowledge Pipeline description: >- Operations for managing and running knowledge pipelines, including datasource plugins and pipeline execution. paths: /messages/{message_id}/feedbacks: post: tags: - Feedback summary: Submit Message Feedback description: >- **Available for**: Chatflow, Chatbot, Agent, Text Generator apps. Records a `like` or `dislike` rating, plus an optional comment, on a message. Submitting `null` for `rating` revokes the message's existing feedback. operationId: postChatMessageFeedback parameters: - name: message_id in: path required: true description: >- ID of the message to give feedback on. Get message IDs from [List Conversation Messages](/en/3.11.x/develop/api/conversations/list-conversation-messages). schema: type: string format: uuid requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/MessageFeedbackRequest' examples: likeFeedback: summary: Request Example value: rating: like user: abc-123 content: This answer was very helpful! responses: '200': $ref: '#/components/responses/SuccessResult' '400': description: >- `invalid_param` : The required `user` field is omitted, or `rating` is `null` but there is no existing feedback to revoke. content: application/json: examples: invalid_param: summary: invalid_param value: status: 400 code: invalid_param message: Arg user must be provided. '404': description: '`not_found` : Message does not exist.' content: application/json: examples: message_not_exists: summary: not_found value: status: 404 code: not_found message: Message Not Exists. components: schemas: MessageFeedbackRequest: type: object description: Request body for submitting message feedback. required: - user properties: rating: type: string enum: - like - dislike - null nullable: true description: >- Feedback rating. Set to `null` to revoke previously submitted feedback. user: type: string description: >- End-user identifier, defined by your app and unique within it. Must match the `user` that received the message, since feedback is scoped to that end user. See [End User Identity](/en/3.11.x/develop/api/guides/end-user-identity). content: type: string description: Optional text feedback providing additional detail. responses: SuccessResult: description: Operation successful. content: application/json: schema: type: object properties: result: type: string description: Operation result. Always `success`. examples: success: summary: Response Example value: result: success securitySchemes: ApiKeyAuth: type: http scheme: bearer bearerFormat: API_KEY description: >- Every request authenticates with an API key: `Authorization: Bearer {API_KEY}`. App endpoints take an app API key; knowledge endpoints take a knowledge base API key ([Get Started](/en/3.11.x/develop/api/guides/get-started)). Keep keys server-side; never embed them in client code. Requests with a missing or invalid key fail with HTTP `401` (`unauthorized`). ````