Series AI

Series AI (Series Entertainment, Inc.) is an a16z-backed, AI-native game company behind RUN.world, a platform to create, publish, play, and monetize HTML5 games. Series ships a real first-party developer surface: the RUN.world SDK (@series-inc/rundot-game-sdk) exposes a single RundotGameAPI for player storage, profiles, leaderboards, ad monetization, purchases, entitlements, multiplayer, server-authoritative simulation, and generative AI (image, audio, video, and text), while the rundot CLI scaffolds, deploys, versions, and operates live titles. StowKit asset tooling, a Three.js-based 3D engine with ECS, the Syncplay deterministic-multiplayer core, and a community workshop of game starters round out the toolchain. Founded by veterans from Riot, Epic, Blizzard, Pocket Gems, and Telltale.

Series AI publishes 1 API on the APIs.io network. Tagged areas include Company, Games, Game Development, Artificial Intelligence, and Generative AI.

Series AI’s developer surface includes documentation, API reference, getting-started guide, CLI, sandbox, changelog, authentication, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

28.1/100 thin ▬ flat Agent 6/100 agent aware library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessOpen

1 APIs

Company Games Game Development Artificial Intelligence Generative AI Game Engine SDK Developer Tools Multiplayer HTML5

Kin Score

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

Composite quality — 28.1/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 14.6 / 20

Access Clarity 2.1 / 20

Operational Transparency 3.8 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

Agent readiness — 6/100 · agent aware

Machine-Readable Contract 0 / 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 0 / 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.

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APIs 1

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

RUN.world SDK

Client-side JavaScript/TypeScript SDK (@series-inc/rundot-game-sdk) that gives an HTML5 game access to RUN.world platform services through a single RundotGameAPI import: storage...

Security Posture 3

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

Series Ai Authentication

0 schemes

SECURITY

Series Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Series Ai Vulnerability Disclosure

disclosure policy published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

ErrorCatalog

ErrorCatalog

Lifecycle

Lifecycle

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 1

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Source (apis.yml)

aid: series-ai
name: Series AI
description: 'Series AI (Series Entertainment, Inc.) is an a16z-backed, AI-native game company behind RUN.world, a platform
  to create, publish, play, and monetize HTML5 games. Series ships a real first-party developer surface: the RUN.world SDK
  (@series-inc/rundot-game-sdk) exposes a single RundotGameAPI for player storage, profiles, leaderboards, ad monetization,
  purchases, entitlements, multiplayer, server-authoritative simulation, and generative AI (image, audio, video, and text),
  while the rundot CLI scaffolds, deploys, versions, and operates live titles. StowKit asset tooling, a Three.js-based 3D
  engine with ECS, the Syncplay deterministic-multiplayer core, and a community workshop of game starters round out the toolchain.
  Founded by veterans from Riot, Epic, Blizzard, Pocket Gems, and Telltale.'
url: https://raw.githubusercontent.com/api-evangelist/series-ai/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  label: Open access
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/126116685?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 14
  pass: local-v1
tags:
- Company
- Games
- Game Development
- Artificial Intelligence
- Generative AI
- Game Engine
- SDK
- Developer Tools
- Multiplayer
- HTML5
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: RUN.world SDK
  description: 'Client-side JavaScript/TypeScript SDK (@series-inc/rundot-game-sdk) that gives an HTML5 game access to RUN.world
    platform services through a single RundotGameAPI import: storage scopes, profiles, leaderboards, ads, purchases, entitlements,
    multiplayer, server-authoritative simulation, and generative AI. Calls cross a React Native JS bridge; failures surface
    as RundotApiError / RateLimitedError.'
  humanURL: https://github.com/series-ai/venus-sdk-docs
  baseURL: https://run.world
  properties:
  - type: Documentation
    url: https://github.com/series-ai/venus-sdk-docs
  - type: APIReference
    url: https://github.com/series-ai/venus-sdk-docs/blob/main/SUMMARY.md
  - type: GettingStarted
    url: https://github.com/series-ai/venus-sdk-docs/blob/main/rundot-developer-platform/getting-started.md
common:
- type: DomainSecurity
  url: security/series-ai-domain-security.yml
- type: DeveloperPortal
  url: https://run.world
- type: Documentation
  url: https://github.com/series-ai/venus-sdk-docs
- type: APIReference
  url: https://github.com/series-ai/venus-sdk-docs/blob/main/SUMMARY.md
- type: GettingStarted
  url: https://github.com/series-ai/venus-sdk-docs/blob/main/rundot-developer-platform/getting-started.md
- type: GitHubOrganization
  url: https://github.com/series-ai
- type: SourceCode
  url: https://github.com/series-ai/run-workshop
- type: PrivacyPolicy
  url: https://series.inc/privacy
- type: Packages
  url: packages/series-ai-packages.yml
- type: SDKs
  url: packages/series-ai-packages.yml
- type: CLI
  url: cli/series-ai-cli.yml
- type: Sandbox
  url: sandbox/series-ai-sandbox.yml
- type: Conventions
  url: conventions/series-ai-conventions.yml
- type: ErrorCatalog
  url: errors/series-ai-problem-types.yml
- type: Lifecycle
  url: lifecycle/series-ai-lifecycle.yml
- type: ChangeLog
  url: changelog/series-ai-changelog.yml
- type: Authentication
  url: authentication/series-ai-authentication.yml
- type: LLMsTxt
  url: llms/series-ai-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: VulnerabilityDisclosure
  url: security/series-ai-vulnerability-disclosure.yml
- type: Security
  url: security/series-ai-vulnerability-disclosure.yml
- type: WellKnown
  url: well-known/series-ai-well-known.yml

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