foundplay-io

Foundplay is a platform that aggregates free browser games, including indie and AI‑generated titles. It offers a catalog of over 2,300 games that can be played directly in the browser without downloads. New games are added twice daily, and the site provides an RSS feed for drops. The service is accessible via web at foundplay.io.

foundplay-io publishes 1 API contract indexed on the APIs.io network: Games API. Tagged areas include Games, Browser, Indie, AI-generated, and Free.

The foundplay-io catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

foundplay-io’s developer surface includes sandbox, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.0/100 thin Agent 24/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 published contracts 1 MCP Servers 4 Agent Skills

Games BrowserIndieAI-generatedFree

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 31.0/100 · thin

Contract Quality 10.0 / 21

Developer Ergonomics 2.7 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 16.0 — up to +16.8 composite points
Contract Quality scores 47.2 — up to +13.2 composite points
Access Clarity scores 34.2 — up to +13.2 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/foundplay-io/apis.yml: open an issue on github.com/api-evangelist/foundplay-io 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 →

APIs 1

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

foundplay-io Games API

The Games API from foundplay-io — 1 operation(s) for games.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

foundplay-io MCP Server

Remote MCP server at foundplay.io.

MCP SERVER

Agent Skills 4

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

foundplay-io-create-and-broadcast-journal

AGENT SKILL

foundplay-io-create-combat-with-combatants

AGENT SKILL

search-games

AGENT SKILL

foundplay-io-send-chat-message

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Foundplay Io Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Foundplay Io Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Foundplay Io Context

120 classes · 169 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

foundplay-io API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

RollAttackRequest

5 properties

JSON SCHEMA

RollDamageRequest

4 properties

JSON SCHEMA

RollSkillRequest

5 properties

JSON SCHEMA

SendChatMessageRequest

6 properties

JSON SCHEMA

UpdateMacroRequest

7 properties

JSON SCHEMA

UpdateSceneRequest

15 properties

JSON SCHEMA

Security Posture 2

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

Foundplay Io Authentication

0 schemes

SECURITY

Foundplay Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Foundplay Io Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Login

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

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

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: foundplay-io
name: foundplay-io
image: https://foundplay.io/opengraph-image.jpg?v=2
description: Foundplay is a platform that aggregates free browser games, including indie and AI‑generated titles. It offers
  a catalog of over 2,300 games that can be played directly in the browser without downloads. New games are added twice daily,
  and the site provides an RSS feed for drops. The service is accessible via web at foundplay.io.
url: https://artifacts.apis.io/foundplay-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Games
- Browser
- Indie
- AI-generated
- Free
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/foundplay-io-agentic-access.yml
- type: Spectral
  url: rules/foundplay-io-rules.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Conformance
  url: conformance/foundplay-io-conformance.yml
- type: LLMsTxt
  url: llms/foundplay-io-llms.txt
- type: MCPServer
  url: mcp/foundplay-io-mcp.yml
- type: Hosts
  url: hosts/foundplay-io-hosts.yml
- type: Vendors
  url: vendors/foundplay-io-vendors.yml
- type: TermsOfService
  url: https://foundplay.io/terms
- type: Sandbox
  url: https://foundplay.io/tags/sandbox
- type: PrivacyPolicy
  url: https://foundplay.io/privacy
- type: Login
  url: https://foundplay.io/signin
- type: DomainSecurity
  url: security/foundplay-io-domain-security.yml
- type: Website
  url: https://foundplay.io/
  image: https://foundplay.io/opengraph-image.jpg?v=2
- type: Blog
  url: https://foundplay.io/drops/feed.xml
apis:
- aid: foundplay-io:foundplay-io-games-api
  name: foundplay-io Games API
  description: The Games API from foundplay-io — 1 operation(s) for games.
  humanURL: https://foundplay.io/
  baseURL: https://foundplay.io
  tags:
  - Games
  properties:
  - type: OpenAPI
    url: openapi/foundplay-io-games-api-openapi.yml
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

foundplay-io API — frequently asked questions

Does foundplay-io have an API?

Yes. APIs.io lists 1 API from foundplay-io, including foundplay-io Games API.

Is there an OpenAPI specification for the foundplay-io API?

Yes. APIs.io indexes 1 OpenAPI specification for foundplay-io, each linked for download from this page.

How do I authenticate with the foundplay-io API?

foundplay-io documents its authentication (0 schemes). The details are profiled on APIs.io as Foundplay Io Authentication.

Does foundplay-io have an MCP server?

Yes. APIs.io lists 1 MCP server for foundplay-io: Remote MCP server at foundplay.io.

Is the foundplay-io API ready for AI agents?

foundplay-io has a Kin Score of 31.0 out of 100 (thin) and an Agent Readiness score of 24.0 (agent-aware), scored by API Evangelist on 2026-10-31.

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