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

# Send a message

> Persist a visitor message; notes are rejected. Authorization and resource ownership are evaluated on every request.



## OpenAPI

````yaml /openapi/widget.json post /api/v1/chat/visitor/messages
openapi: 3.1.0
info:
  title: Widget API
  version: 1.0.0
  description: >-
    Embed Writine chat on your own site. These endpoints need no Writine
    account: the widget routes are authorised by your site origin allowlist, and
    the visitor routes by a token issued when a conversation starts.
servers:
  - url: https://api.writine.com
    description: Production
security: []
paths:
  /api/v1/chat/visitor/messages:
    post:
      summary: Send a message
      description: >-
        Persist a visitor message; notes are rejected. Authorization and
        resource ownership are evaluated on every request.
      operationId: chat_post__api_v1_chat_visitor_messages
      parameters:
        - in: header
          name: Origin
          required: true
          schema:
            type: string
            format: uri
          description: >-
            Must exactly match the website's allowlist. Visitor tokens are bound
            to this origin.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                body:
                  type: string
                  maxLength: 8000
                client_id:
                  type: string
                  maxLength: 100
                  minLength: 8
                kind:
                  type: string
                  enum:
                    - message
              required:
                - body
                - client_id
              additionalProperties: false
      responses:
        '201':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      message:
                        type: object
                        properties:
                          id:
                            type: string
                            maxLength: 100
                          sequence:
                            type: integer
                            minimum: 0
                          conversation_id:
                            type: string
                            maxLength: 100
                          client_id:
                            type: string
                            maxLength: 100
                          author_id:
                            type: string
                            maxLength: 100
                          author_type:
                            type: string
                            enum:
                              - staff
                              - visitor
                          kind:
                            type: string
                            enum:
                              - message
                              - note
                          body:
                            type: string
                            maxLength: 8000
                          created_at:
                            type: string
                            format: date-time
                          author_name:
                            type: string
                            maxLength: 80
                          author_avatar:
                            type: string
                            maxLength: 100
                        required:
                          - id
                          - sequence
                          - conversation_id
                          - client_id
                          - author_id
                          - author_type
                          - kind
                          - body
                          - created_at
                          - author_name
                          - author_avatar
                        additionalProperties: false
                      duplicate:
                        type: boolean
                    required:
                      - message
                      - duplicate
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '400':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '401':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '403':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '404':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '409':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '429':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '500':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
        '503':
          description: Typed error envelope
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  result:
                    type: object
                    properties:
                      code:
                        type: string
                        maxLength: 256
                    required:
                      - code
                    additionalProperties: false
                  message:
                    type: string
                    maxLength: 256
                required:
                  - success
                  - result
                  - message
                additionalProperties: false
      security:
        - Visitor token: []
components:
  securitySchemes:
    Visitor token:
      type: http
      scheme: bearer
      description: Opaque, 24-hour, conversation-scoped visitor credential

````

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