Convai Interaction API

openapi: 3.1.0
info:
  title: Convai Interaction API
  version: "1.0"
  description: |
    The Interaction API is the runtime conversational endpoint for Convai
    characters. Send user text or audio with a sessionID and characterID and
    receive the character's spoken and animated response, including text reply,
    audio bytes, action triggers, emotion state, and lip-sync data. This is the
    endpoint that powers in-game and in-world NPC conversations.
servers:
- url: https://api.convai.com
security:
- ConvaiApiKey: []
paths:
  /character/getResponse:
    post:
      summary: Get Character Response
      operationId: getCharacterResponse
      tags: [Interaction]
      description: |
        Send user input to a Convai character and receive its conversational
        response. Supports text and audio input, with audio, text, action, and
        emotion outputs. Use sessionID="-1" to start a new conversation.
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/GetResponseRequest'
      responses:
        '200':
          description: Character response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GetResponseResponse'
components:
  securitySchemes:
    ConvaiApiKey:
      type: apiKey
      in: header
      name: CONVAI-API-KEY
  schemas:
    GetResponseRequest:
      type: object
      required: [userText, charID, sessionID, voiceResponse]
      properties:
        userText:
          type: string
          description: User input as text. Use "(USER_PERFORMED_ACTIONS)" placeholder when sending audio.
        charID: { type: string }
        sessionID:
          type: string
          description: Use "-1" to start a new session
        voiceResponse:
          type: boolean
          description: Whether to include audio in the response
        file:
          type: string
          format: binary
          description: Optional audio file (wav) for voice input
    GetResponseResponse:
      type: object
      properties:
        text:
          type: string
          description: Character text reply
        audio:
          type: string
          format: byte
          description: Base64-encoded audio response
        sessionID: { type: string }
        action: { type: string }
        emotion: { type: string }
        narrativeSectionId: { type: string }