Reactor

Reactor is a real-time video AI platform that streams generative video from GPU-hosted models to web and mobile applications over WebRTC, with sub-second round-trip latency and no infrastructure to manage. Developers connect through a JavaScript/React SDK or an async Python SDK, mint short-lived session tokens from a long-lived account API key, and control generation with a command/event channel (set_prompt, start, pause, reset). Its model catalog includes Helios (interactive real-time generation), SANA-Streaming (video-to-video editing), LingBot and LingBot World 2 (navigable worlds), X2, LongLive-2.0 and HappyOyster. Reactor is backed by Amplify Partners and Lightspeed Venture Partners and is currently in public beta.

Reactor publishes 1 API on the APIs.io network: Realtime Video API. Tagged areas include Company, Ai Ml, Video, Generative AI, and Real-Time.

The Reactor catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Reactor’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, changelog, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

46.0/100 developing ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Ai Ml Video Generative AI Real-Time WebRTC Streaming SDK Media

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 46.0/100 · developing

Contract Quality 10.4 / 25

Developer Ergonomics 16.2 / 20

Access Clarity 6.8 / 20

Operational Transparency 4.4 / 13

Contract Governance 0.5 / 12

Discoverability 7.6 / 10

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/reactor: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

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 an...

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Reactor Helios Realtime API

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 emi...

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Reactor Authentication

apiKey/http · 2 schemes

SECURITY

Reactor Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Components

Conventions

ErrorCatalog

Lifecycle

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: reactor
name: Reactor
description: Reactor is a real-time video AI platform that streams generative video from GPU-hosted models to web and mobile
  applications over WebRTC, with sub-second round-trip latency and no infrastructure to manage. Developers connect through
  a JavaScript/React SDK or an async Python SDK, mint short-lived session tokens from a long-lived account API key, and control
  generation with a command/event channel (set_prompt, start, pause, reset). Its model catalog includes Helios (interactive
  real-time generation), SANA-Streaming (video-to-video editing), LingBot and LingBot World 2 (navigable worlds), X2, LongLive-2.0
  and HappyOyster. Reactor is backed by Amplify Partners and Lightspeed Venture Partners and is currently in public beta.
url: https://raw.githubusercontent.com/api-evangelist/reactor/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- amplify-partners
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.reactor.inc/icon.png
tags:
- Company
- Ai Ml
- Video
- Generative AI
- Real-Time
- WebRTC
- Streaming
- SDK
- Media
apis:
- name: Reactor Realtime Video API
  description: 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.
  humanURL: https://docs.reactor.inc
  baseURL: https://api.reactor.inc
  tags:
  - Video
  - Generative AI
  - Real-Time
  - WebRTC
  properties:
  - type: AsyncAPI
    url: asyncapi/reactor-helios-asyncapi.yml
  - type: Authentication
    url: authentication/reactor-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://reactor.inc
- type: DeveloperPortal
  url: https://docs.reactor.inc
- type: Documentation
  url: https://docs.reactor.inc
- type: APIReference
  url: https://docs.reactor.inc/model-api-reference/overview
- type: GettingStarted
  url: https://docs.reactor.inc/quickstart
- type: Support
  url: https://discord.gg/tMcJM8N5N3
- type: Blog
  url: https://www.reactor.inc/blog
- type: GitHubOrganization
  url: https://github.com/reactor-team
- type: SignUp
  url: https://www.reactor.inc/dashboard
- type: TermsOfService
  url: https://www.reactor.inc/terms
- type: PrivacyPolicy
  url: https://www.reactor.inc/privacy
- type: StatusPage
  url: https://status.reactor.inc
- type: ChangeLog
  url: https://docs.reactor.inc/changelog
- type: LLMsTxt
  url: llms/reactor-llms.txt
- type: Packages
  url: packages/reactor-packages.yml
- type: SDKs
  url: packages/reactor-packages.yml
- type: CLI
  url: cli/reactor-cli.yml
- type: Components
  url: components/reactor-components.yml
- type: X-MCPServerCandidate
  url: mcp/reactor-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: Authentication
  url: authentication/reactor-authentication.yml
- type: Conventions
  url: conventions/reactor-conventions.yml
- type: ErrorCatalog
  url: errors/reactor-problem-types.yml
- type: Lifecycle
  url: lifecycle/reactor-lifecycle.yml
- type: Conformance
  url: conformance/reactor-conformance.yml
- type: Sandbox
  url: sandbox/reactor-sandbox.yml
- type: AsyncAPI
  url: asyncapi/reactor-helios-asyncapi.yml
- type: DomainSecurity
  url: security/reactor-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1

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