Reactor Realtime Video API
Real-time generative video platform. A REST token endpoint mints session-scoped JWTs; a WebRTC data channel carries the command/event interface that controls model generation and streams video frames back.
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AsyncAPI Specification
asyncapi: 3.0.0
# generated: '2026-07-20'
# method: generated
# source: https://docs.reactor.inc/model-api-reference/helios/schema
# note: Faithful AsyncAPI rendering of the documented Helios real-time command/event
# surface (WebRTC data channel). Not a provider-published spec — generated from the
# documented message schema. Commands are client->model; events are model->client.
info:
title: Reactor Helios Realtime API
version: '1.0'
description: >-
Real-time video generation control channel for Reactor's Helios model,
exchanged over a WebRTC data channel after a session reaches "ready".
Clients send commands; the model emits state and lifecycle events.
servers:
reactor:
host: api.reactor.inc
protocol: wss
description: Reactor session established via POST https://api.reactor.inc/tokens then a WebRTC connection.
channels:
commands:
address: commands
description: Commands the client sends to control generation (sendCommand).
messages:
set_prompt: {$ref: '#/components/messages/set_prompt'}
schedule_prompt: {$ref: '#/components/messages/schedule_prompt'}
set_image: {$ref: '#/components/messages/set_image'}
set_conditioning: {$ref: '#/components/messages/set_conditioning'}
set_image_strength: {$ref: '#/components/messages/set_image_strength'}
set_sr_scale: {$ref: '#/components/messages/set_sr_scale'}
set_seed: {$ref: '#/components/messages/set_seed'}
start: {$ref: '#/components/messages/start'}
pause: {$ref: '#/components/messages/pause'}
resume: {$ref: '#/components/messages/resume'}
reset: {$ref: '#/components/messages/reset'}
events:
address: messages
description: Messages the model emits back to the client (on "message").
messages:
state: {$ref: '#/components/messages/state'}
prompt_accepted: {$ref: '#/components/messages/prompt_accepted'}
image_accepted: {$ref: '#/components/messages/image_accepted'}
conditions_ready: {$ref: '#/components/messages/conditions_ready'}
generation_started: {$ref: '#/components/messages/generation_started'}
chunk_complete: {$ref: '#/components/messages/chunk_complete'}
generation_paused: {$ref: '#/components/messages/generation_paused'}
generation_resumed: {$ref: '#/components/messages/generation_resumed'}
command_error: {$ref: '#/components/messages/command_error'}
operations:
sendCommand:
action: send
channel: {$ref: '#/channels/commands'}
receiveMessage:
action: receive
channel: {$ref: '#/channels/events'}
components:
messages:
set_prompt:
name: set_prompt
payload: {type: object, properties: {prompt: {type: string}}}
schedule_prompt:
name: schedule_prompt
payload: {type: object, properties: {prompt: {type: string}, chunk: {type: integer}}}
set_image:
name: set_image
payload: {type: object, properties: {image: {type: string, description: FileRef}}}
set_conditioning:
name: set_conditioning
payload: {type: object, properties: {prompt: {type: string}, image: {type: string, description: FileRef}}}
set_image_strength:
name: set_image_strength
payload: {type: object, properties: {image_strength: {type: number, minimum: 0.0, maximum: 1.0}}}
set_sr_scale:
name: set_sr_scale
payload: {type: object, properties: {sr_scale: {type: string, enum: [off, 2x, 4x]}}}
set_seed:
name: set_seed
payload: {type: object, properties: {seed: {type: integer}}}
start:
name: start
payload: {type: object}
pause:
name: pause
payload: {type: object}
resume:
name: resume
payload: {type: object}
reset:
name: reset
payload: {type: object}
state:
name: state
payload:
type: object
properties:
running: {type: boolean}
started: {type: boolean}
paused: {type: boolean}
image_set: {type: boolean}
current_chunk: {type: integer}
current_frame: {type: integer}
current_prompt: {type: string}
image_strength: {type: number}
scheduled_prompts: {type: array}
prompt_accepted:
name: prompt_accepted
payload: {type: object, properties: {prompt: {type: string}}}
image_accepted:
name: image_accepted
payload: {type: object, properties: {width: {type: integer}, height: {type: integer}}}
conditions_ready:
name: conditions_ready
payload: {type: object, properties: {has_prompt: {type: boolean}, has_image: {type: boolean}}}
generation_started:
name: generation_started
payload: {type: object, properties: {prompt: {type: string}, chunk_index: {type: integer}}}
chunk_complete:
name: chunk_complete
payload: {type: object, properties: {chunk_index: {type: integer}, frames_emitted: {type: integer}, active_prompt: {type: string}}}
generation_paused:
name: generation_paused
payload: {type: object, properties: {chunk_index: {type: integer}}}
generation_resumed:
name: generation_resumed
payload: {type: object, properties: {chunk_index: {type: integer}}}
command_error:
name: command_error
payload: {type: object, properties: {command: {type: string}, reason: {type: string}}}