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 is listed with 1 API on the APIs.io network: Realtime Video API. Tagged areas include Company, Artificial Intelligence, 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 📡 Profile data on GitHub

46.0/100 developing ▬ flat Agent 23/100 agent aware Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 5 Agent Skills

Company Artificial Intelligence Video Generative AI Real-Time WebRTC Streaming SDK Media

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 46.0/100 · developing

Contract Quality 8.4 / 21

Developer Ergonomics 13.8 / 17

Access Clarity 5.8 / 17

Operational Transparency 3.8 / 11

Contract Governance 0.5 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.4 / 15

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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 39.6 — up to +15.1 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Contract Governance scores 4.5 — up to +11.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/reactor/apis.yml: open an issue on github.com/api-evangelist/reactor to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	distribution	9.6 (thin)	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Agent Skills

measured — observed by APIs.io (published)

AsyncAPI

measured — observed by APIs.io (published)

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...

Agent Skills 5

Packaged agent skills for driving this provider's APIs from an AI assistant.

helios-prompts

AGENT SKILL

lingbot-world-2-prompts

AGENT SKILL

lingbot-world

AGENT SKILL

reactor-sdk

AGENT SKILL

sana-streaming-prompts

AGENT SKILL

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Reactor

SLA

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: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.reactor.inc/icon.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-docs-hosting: vercel
tags:
- Company
- Artificial Intelligence
- Video
- Generative AI
- Real-Time
- WebRTC
- Streaming
- SDK
- Media
tags_raw:
- 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

Reactor API — frequently asked questions

Does Reactor have an API?

Yes. APIs.io lists 1 API from Reactor, including Reactor Realtime Video API.

How do I authenticate with the Reactor API?

Reactor uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Reactor Authentication.

Is the Reactor API ready for AI agents?

Reactor has a Kin Score of 46.0 out of 100 (developing) and an Agent Readiness score of 23.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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