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 is listed with 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 📡 Profile data on GitHub

28.1/100 thin ▬ flat Agent 6/100 agent aware Heartbeat 81/100 alive library Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 API 3 Agent Skills

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

Kin Score

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

Composite quality — 28.1/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 12.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 3.2 / 11

Contract Governance 0.0 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.0 / 15

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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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)

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Contract Governance scores 0.0 — up to +12.0 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/series-ai/apis.yml: open an issue on github.com/api-evangelist/series-ai 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
XR & Graphics (XR, 3D, GPU graphics)	undeclared	-	-	-

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 1

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.

HTML5

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

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...

Agent Skills 3

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

Deploy a game to RUN.world

AGENT SKILL

Persist player progress and post a leaderboard score

AGENT SKILL

Add rewarded-ad monetization

AGENT SKILL

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

no policy recorded

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
  license_evidence:
    not_product:
    - series-ai/run-workshop
  open_source: unknown
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: medium
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  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

Series AI API — frequently asked questions

Does Series AI have an API?

Yes. APIs.io lists 1 API from Series AI, including RUN.world SDK.

How do I authenticate with the Series AI API?

Series AI uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as Series Ai Authentication.

Is the Series AI API ready for AI agents?

Series AI has a Kin Score of 28.1 out of 100 (thin) and an Agent Readiness score of 6.3 (agent-aware), scored by API Evangelist on 2026-11-06.

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