Kongregate

Kongregate is a browser-game platform and publisher that hosts thousands of free online games across action, puzzle, RPG, strategy, idle and multiplayer genres. For game developers it operates a two-part developer API: a CDN-delivered client JavaScript API (with Unity WebGL bindings) handling player identity, in-page registration, statistic submission and the Kreds purchase flow; and a server-side REST API at api.kongregate.com that authenticates players, reads and consumes the Kreds virtual-goods inventory, submits statistics, reads lifetime/weekly/daily/friends leaderboards, and registers game-defined guilds and characters. Kongregate monetizes through Kreds, its own virtual currency, and rewards player engagement with badges and collectible Kongpanions. Outbound API callbacks are delivered as HMAC-SHA256 signed requests. Kongregate Inc. is backed by Lightspeed Venture Partners and Uncork Capital.

Kongregate publishes 13 APIs on the APIs.io network, including Authenticate.json API, Characters.json API, Guilds API, and 10 more. Tagged areas include Company, Gaming, Games, Game Development, and Browser Games.

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

Kongregate’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, authentication, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.1/100 developing ▬ flat Agent 30/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Gaming Games Game Development Browser Games Virtual GoodsMicrotransactionsLeaderboardsPlayer IdentityUnity Developer Platform

Kin Score

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

Composite quality — 44.1/100 · developing

Contract Quality 13.4 / 23

Developer Ergonomics 10.4 / 18

Access Clarity 8.0 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/kongregate: 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 14

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

Kongregate Client JavaScript API

Browser-side JavaScript API loaded by script tag from cdn1.kongregate.com. Exposes kongregate.services.* for player identity (getUserId, getUsername, getGameAuthToken, isGuest, ...

Kongregate Authenticate.json API

The Authenticate.json API from Kongregate — 1 operation(s) for authenticate.json.

Kongregate Characters.json API

The Characters.json API from Kongregate — 1 operation(s) for characters.json.

Kongregate Guilds API

The Guilds API from Kongregate — 1 operation(s) for guilds.

Kongregate Guilds.json API

The Guilds.json API from Kongregate — 1 operation(s) for guilds.json.

Kongregate High Scores API

The High Scores API from Kongregate — 2 operation(s) for high scores.

Kongregate Items.json API

The Items.json API from Kongregate — 1 operation(s) for items.json.

Kongregate Kongpanions API

The Kongpanions API from Kongregate — 1 operation(s) for kongpanions.

Kongregate Kongpanions.json API

The Kongpanions.json API from Kongregate — 1 operation(s) for kongpanions.json.

Kongregate Shared Links API

The Shared Links API from Kongregate — 2 operation(s) for shared links.

Kongregate Submit Statistics.json API

The Submit Statistics.json API from Kongregate — 1 operation(s) for submit statistics.json.

Kongregate Use Item.json API

The Use Item.json API from Kongregate — 1 operation(s) for use item.json.

Kongregate User Info.json API

The User Info.json API from Kongregate — 1 operation(s) for user info.json.

Kongregate User Items.json API

The User Items.json API from Kongregate — 1 operation(s) for user items.json.

Scroll for all 14

Open Collections 14

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

api Authenticate.json API

OPEN COLLECTION

api Authenticate.json Characters.json API

OPEN COLLECTION

api Authenticate.json Guilds API

OPEN COLLECTION

api Authenticate.json Guilds.json API

OPEN COLLECTION

api Authenticate.json High Scores API

OPEN COLLECTION

api Authenticate.json Items.json API

OPEN COLLECTION

api Authenticate.json Kongpanions API

OPEN COLLECTION

api Authenticate.json Kongpanions.json API

OPEN COLLECTION

api Authenticate.json Shared Links API

OPEN COLLECTION

api Authenticate.json Submit Statistics.json API

OPEN COLLECTION

api Authenticate.json Use Item.json API

OPEN COLLECTION

api Authenticate.json User Info.json API

OPEN COLLECTION

api Authenticate.json User Items.json API

OPEN COLLECTION

Scroll for all 14

Event Specifications 1

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

Kongregate Callbacks Webhooks

ASYNCAPI

Security Posture 2

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

Kongregate Authentication

apiKey · 3 schemes

SECURITY

Kongregate Domain Security

TLSv1.2 · DNSSEC

SECURITY

Agentic Access 1

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

Kongregate Agentic Access

15 operations · 7 acting

AGENTIC

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

OpenAPI

OpenAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

AgentSkill

AgenticAccess

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Conformance

Lifecycle

Webhooks

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: kongregate
name: Kongregate
description: 'Kongregate is a browser-game platform and publisher that hosts thousands of free online games across action,
  puzzle, RPG, strategy, idle and multiplayer genres. For game developers it operates a two-part developer API: a CDN-delivered
  client JavaScript API (with Unity WebGL bindings) handling player identity, in-page registration, statistic submission and
  the Kreds purchase flow; and a server-side REST API at api.kongregate.com that authenticates players, reads and consumes
  the Kreds virtual-goods inventory, submits statistics, reads lifetime/weekly/daily/friends leaderboards, and registers game-defined
  guilds and characters. Kongregate monetizes through Kreds, its own virtual currency, and rewards player engagement with
  badges and collectible Kongpanions. Outbound API callbacks are delivered as HMAC-SHA256 signed requests. Kongregate Inc.
  is backed by Lightspeed Venture Partners and Uncork Capital.'
url: https://raw.githubusercontent.com/api-evangelist/kongregate/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - 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
image: https://www.kongregate.com/apple-touch-icon.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
- uncork-capital
x-tier: enriched
x-tier-reason: first-party OpenAPI 3.1.0 and llms.txt harvested from docs.kongregate.com
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Gaming
- Games
- Game Development
- Browser Games
- Virtual Goods
- Microtransactions
- Leaderboards
- Player Identity
- Unity
- Developer Platform
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Kongregate Client JavaScript API
  description: Browser-side JavaScript API loaded by script tag from cdn1.kongregate.com. Exposes kongregate.services.* for
    player identity (getUserId, getUsername, getGameAuthToken, isGuest, showRegistrationBox, resizeGame, addEventListener),
    kongregate.stats.submit for statistic submission, and kongregate.mtx.* for the Kreds purchase and inventory flow. Unity
    WebGL games consume it through jsLib bindings and the official Kongregate WebGL template.
  humanURL: https://docs.kongregate.com/docs/javascript-api
  baseURL: https://cdn1.kongregate.com/javascripts/kongregate_api.js
  tags:
  - Gaming
  - JavaScript
  - Unity
  - Client SDK
  properties:
  - type: Documentation
    url: https://docs.kongregate.com/docs/javascript-api
  - type: APIReference
    url: https://docs.kongregate.com/reference/client-api-stats-submit
  - type: GettingStarted
    url: https://docs.kongregate.com/docs/client-api-introduction
- aid: kongregate:kongregate-authenticate-json-api
  name: Kongregate Authenticate.json API
  description: The Authenticate.json API from Kongregate — 1 operation(s) for authenticate.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Authenticate.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-authenticate-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-characters-json-api
  name: Kongregate Characters.json API
  description: The Characters.json API from Kongregate — 1 operation(s) for characters.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Characters.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-characters-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-guilds-api
  name: Kongregate Guilds API
  description: The Guilds API from Kongregate — 1 operation(s) for guilds.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Guilds
  properties:
  - type: OpenAPI
    url: openapi/kongregate-guilds-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-guilds-json-api
  name: Kongregate Guilds.json API
  description: The Guilds.json API from Kongregate — 1 operation(s) for guilds.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Guilds.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-guilds-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-high-scores-api
  name: Kongregate High Scores API
  description: The High Scores API from Kongregate — 2 operation(s) for high scores.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - High Scores
  properties:
  - type: OpenAPI
    url: openapi/kongregate-high-scores-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-items-json-api
  name: Kongregate Items.json API
  description: The Items.json API from Kongregate — 1 operation(s) for items.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Items.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-items-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-kongpanions-api
  name: Kongregate Kongpanions API
  description: The Kongpanions API from Kongregate — 1 operation(s) for kongpanions.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Kongpanions
  properties:
  - type: OpenAPI
    url: openapi/kongregate-kongpanions-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-kongpanions-json-api
  name: Kongregate Kongpanions.json API
  description: The Kongpanions.json API from Kongregate — 1 operation(s) for kongpanions.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Kongpanions.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-kongpanions-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-shared-links-api
  name: Kongregate Shared Links API
  description: The Shared Links API from Kongregate — 2 operation(s) for shared links.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Shared Links
  properties:
  - type: OpenAPI
    url: openapi/kongregate-shared-links-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-submit-statistics-json-api
  name: Kongregate Submit Statistics.json API
  description: The Submit Statistics.json API from Kongregate — 1 operation(s) for submit statistics.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Submit Statistics.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-submit-statistics-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-use-item-json-api
  name: Kongregate Use Item.json API
  description: The Use Item.json API from Kongregate — 1 operation(s) for use item.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - Use Item.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-use-item-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-user-info-json-api
  name: Kongregate User Info.json API
  description: The User Info.json API from Kongregate — 1 operation(s) for user info.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - User Info.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-user-info-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
- aid: kongregate:kongregate-user-items-json-api
  name: Kongregate User Items.json API
  description: The User Items.json API from Kongregate — 1 operation(s) for user items.json.
  humanURL: https://docs.kongregate.com/docs/server-side-http
  baseURL: https://api.kongregate.com/api
  tags:
  - User Items.json
  properties:
  - type: OpenAPI
    url: openapi/kongregate-user-items-json-api-openapi.yml
  - type: Documentation
    url: https://docs.kongregate.com/docs/server-side-http
  - type: APIReference
    url: https://docs.kongregate.com/reference/server-api-authenticate
common:
- type: Website
  url: https://www.kongregate.com
- type: DeveloperPortal
  url: https://docs.kongregate.com
- type: Documentation
  url: https://docs.kongregate.com/docs/integration-overview
- type: APIReference
  url: https://docs.kongregate.com/reference/server-api-authenticate
- type: GettingStarted
  url: https://docs.kongregate.com/docs/kongregate-launch-101
- type: Support
  url: https://kongregatesupport.zendesk.com/hc/en-us/categories/26688218392717-Developers
- type: GitHubOrganization
  url: https://github.com/kongregate
- type: TermsOfService
  url: https://www.kongregate.com/en/terms-of-service
- type: PrivacyPolicy
  url: https://privacy.kongregate.com/privacy_policy.html
- type: Pricing
  url: https://www.kongregate.com/en/kreds
- type: SignUp
  url: https://www.kongregate.com/en/accounts/new
- type: OpenAPI
  url: openapi/_original/kongregate-server-api-openapi-original.json
- type: Overlay
  url: overlays/kongregate-server-api-overlay.yaml
- type: LLMsTxt
  url: llms/kongregate-llms.txt
- type: X-MCPServerCandidate
  url: mcp/kongregate-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: AgenticAccess
  url: agentic-access/kongregate-agentic-access.yml
- type: Authentication
  url: authentication/kongregate-authentication.yml
- type: Conventions
  url: conventions/kongregate-conventions.yml
- type: ErrorCatalog
  url: errors/kongregate-problem-types.yml
- type: DataModel
  url: data-model/kongregate-data-model.yml
- type: Conformance
  url: conformance/kongregate-conformance.yml
- type: Lifecycle
  url: lifecycle/kongregate-lifecycle.yml
- type: Webhooks
  url: asyncapi/kongregate-callbacks-webhooks.yml
- type: Packages
  url: packages/kongregate-packages.yml
- type: SDKs
  url: packages/kongregate-packages.yml
- type: Sandbox
  url: sandbox/kongregate-sandbox.yml
- type: WellKnown
  url: well-known/kongregate-well-known.yml
- type: DomainSecurity
  url: security/kongregate-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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