Runway Realtime Sessions API

openapi: 3.1.0
info:
  title: Runway Characters Avatars Realtime Sessions API
  description: The Runway Characters API enables developers to build real-time conversational avatars powered by GWM-1, Runway's General World Model. Characters are fully custom conversational video agents that can be created from a single image with no fine-tuning required, supporting photorealistic or animated styles, human or non-human appearances. The API manages avatars, real-time sessions via WebRTC, and knowledge documents that avatars can reference during conversations. Sessions have a maximum duration of 5 minutes.
  version: '2024-11-06'
  contact:
    name: Runway Support
    url: https://support.runwayml.com/
  termsOfService: https://runwayml.com/terms-of-use
servers:
- url: https://api.dev.runwayml.com/v1
  description: Production Server
security:
- bearerAuth: []
tags:
- name: Realtime Sessions
  description: Create live WebRTC sessions connecting users to avatars for real-time conversational interactions. Each session has a maximum duration of 5 minutes.
paths:
  /realtime_sessions:
    post:
      operationId: createRealtimeSession
      summary: Create a new realtime session
      description: Creates a new realtime WebRTC session connecting a user to an avatar for a live conversational interaction. The session returns WebRTC credentials (server URL, token, and room name) that can only be retrieved once. If the WebRTC connection fails after credentials are consumed, a new session must be created. Sessions have a maximum duration of 5 minutes.
      tags:
      - Realtime Sessions
      parameters:
      - $ref: '#/components/parameters/RunwayVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateRealtimeSessionRequest'
      responses:
        '200':
          description: Session created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RealtimeSession'
        '400':
          description: Bad request - invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized - invalid or missing API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    CreateRealtimeSessionRequest:
      type: object
      required:
      - model
      - avatar
      properties:
        model:
          type: string
          description: The realtime session model type. Must be set to gwm1_avatars.
          enum:
          - gwm1_avatars
        avatar:
          oneOf:
          - $ref: '#/components/schemas/PresetAvatarConfig'
          - $ref: '#/components/schemas/CustomAvatarConfig'
          description: Avatar configuration for the session. Can be a preset avatar or a custom avatar created via the avatars endpoint.
        maxSessionDurationSeconds:
          type: integer
          description: Maximum session duration in seconds. Sessions have an absolute maximum of 300 seconds (5 minutes).
          maximum: 300
        personality:
          type: string
          description: Optional override for the avatar personality for this session only. If not provided, the avatar's default personality is used.
        startScript:
          type: string
          description: Optional override for the avatar's opening script for this session only. If not provided, the avatar's default opening message is used.
    RealtimeSession:
      type: object
      properties:
        id:
          type: string
          format: uuid
          description: The unique identifier of the session.
        status:
          type: string
          description: The current status of the session.
          enum:
          - PENDING
          - READY
          - ACTIVE
          - ENDED
        serverUrl:
          type: string
          format: uri
          description: The WebRTC server URL to connect to for this session.
        token:
          type: string
          description: The authentication token for the WebRTC connection. Can only be retrieved once.
        roomName:
          type: string
          description: The name of the WebRTC room to join.
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: A human-readable error message describing what went wrong.
        code:
          type: string
          description: A machine-readable error code identifying the type of error.
    PresetAvatarConfig:
      type: object
      required:
      - type
      - presetId
      properties:
        type:
          type: string
          description: Indicates this is a preset avatar configuration.
          enum:
          - preset
        presetId:
          type: string
          description: The identifier of a preset avatar. Available presets include game-character, music-superstar, game-character-man, cat-character, influencer, tennis-coach, human-resource, fashion-designer, and cooking-teacher.
          enum:
          - game-character
          - music-superstar
          - game-character-man
          - cat-character
          - influencer
          - tennis-coach
          - human-resource
          - fashion-designer
          - cooking-teacher
    CustomAvatarConfig:
      type: object
      required:
      - type
      - avatarId
      properties:
        type:
          type: string
          description: Indicates this is a custom avatar configuration.
          enum:
          - custom
        avatarId:
          type: string
          format: uuid
          description: The unique identifier of a custom avatar created via the avatars endpoint.
  parameters:
    RunwayVersion:
      name: X-Runway-Version
      in: header
      required: true
      description: API version identifier. Must be set to the exact value 2024-11-06.
      schema:
        type: string
        enum:
        - '2024-11-06'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key passed via the HTTP Authorization header using the Bearer scheme. Obtain your API key from the Runway Developer Portal at https://dev.runwayml.com/.
externalDocs:
  description: Runway Characters Documentation
  url: https://docs.dev.runwayml.com/characters/