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

# Start Conversation

> Start a new conversation by sending an outbound message.



## OpenAPI

````yaml /api-reference/openapi.json post /api/v1/conversations/start
openapi: 3.1.0
info:
  title: wazzapi Public API
  description: >-
    Public API surface for external API-key clients. Only stable /api/v1
    endpoints are included.


    ## Webhook deliveries

    This reference also includes the webhook requests Wazzapi sends to your
    endpoint for incoming messages, message status updates, and device status
    changes. See the `Incoming webhooks` section in the sidebar for headers,
    payload fields, and concrete examples.
  version: 1.0.0
servers: []
security: []
tags:
  - name: Incoming webhooks
    description: >-
      POST deliveries that Wazzapi sends to your webhook endpoint after you
      subscribe to supported events. Verify the signature against the raw body
      and return a 2xx response quickly.
paths:
  /api/v1/conversations/start:
    post:
      tags:
        - conversations
      summary: Start Conversation
      description: Start a new conversation by sending an outbound message.
      operationId: start_conversation_api_v1_conversations_start_post
      parameters:
        - name: Authorization
          in: header
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            title: Authorization
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ConversationStartRequest'
      responses:
        '201':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConversationStartResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    ConversationStartRequest:
      properties:
        whatsapp_account_id:
          type: string
          format: uuid
          title: Whatsapp Account Id
        remote_jid:
          type: string
          maxLength: 255
          title: Remote Jid
        phone_number:
          anyOf:
            - type: string
              maxLength: 50
            - type: 'null'
          title: Phone Number
        content:
          anyOf:
            - type: string
              maxLength: 4096
            - type: 'null'
          title: Content
        caption:
          anyOf:
            - type: string
              maxLength: 1024
            - type: 'null'
          title: Caption
        message_type:
          type: string
          title: Message Type
          default: text
        media_url:
          anyOf:
            - type: string
              maxLength: 2048
            - type: 'null'
          title: Media Url
        media_type:
          anyOf:
            - type: string
              maxLength: 50
            - type: 'null'
          title: Media Type
        filename:
          anyOf:
            - type: string
              maxLength: 255
            - type: 'null'
          title: Filename
        mimetype:
          anyOf:
            - type: string
              maxLength: 127
            - type: 'null'
          title: Mimetype
        reply_to_message_id:
          anyOf:
            - type: string
              format: uuid
            - type: 'null'
          title: Reply To Message Id
        reply_to_whatsapp_id:
          anyOf:
            - type: string
              maxLength: 255
            - type: 'null'
          title: Reply To Whatsapp Id
      type: object
      required:
        - whatsapp_account_id
        - remote_jid
      title: ConversationStartRequest
    ConversationStartResponse:
      properties:
        conversation_id:
          type: string
          format: uuid
          title: Conversation Id
        message_id:
          type: string
          format: uuid
          title: Message Id
        success:
          type: boolean
          title: Success
        status:
          type: string
          title: Status
        message_type:
          type: string
          title: Message Type
          default: text
      type: object
      required:
        - conversation_id
        - message_id
        - success
        - status
      title: ConversationStartResponse
    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
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError

````