Unreal Engine
Unreal Engine is Epic Games' real-time 3D engine for games, film, broadcast, architecture, simulation, automotive, and live events. The engine is shipped as a downloadable editor, source on GitHub (under the Unreal Engine EULA), and a deep C++ and Blueprint API surface rather than a public REST API. The developer-facing surface includes the Unreal C++ API reference, the Blueprint visual scripting API, the Online Subsystem (OSS) abstraction over platform backends, the Pixel Streaming framework for streaming Unreal apps over WebRTC, the Render Hardware Interface (RHI), the Slate UI framework, and a plugin and Marketplace ecosystem (now Fab). Programmatic backend integration for Unreal-built games is typically delivered via Epic Online Services (EOS), profiled separately. This profile documents Unreal Engine as an SDK and tooling surface rather than as a REST API.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Unreal Engine the way a machine reads it — 11 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Unreal Engine scores 24.3/100 (emerging), with a separate agent-readiness read of 7/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Unreal Engine
Each block below is one kind of artifact we hold for Unreal Engine. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Unreal Engine C++ API
The Unreal Engine C++ API is the primary programmatic surface of the engine. It is shipped as engine source on GitHub (under the Unreal Engine EULA) and documented as a per-modu...
Unreal Blueprint Visual Scripting
Blueprints are Unreal Engine's visual scripting system. Blueprint nodes wrap the underlying C++ API, letting designers and programmers build gameplay, UI, and tooling logic with...
Unreal Online Subsystem (OSS / OSSv2)
The Online Subsystem is Unreal's abstraction over platform online backends (Steam, PlayStation, Xbox Live, Nintendo, EOS, Google Play, Apple GameCenter, Discord). It exposes a c...
Unreal Pixel Streaming
Pixel Streaming streams an Unreal Engine application running on a server to remote browser clients over WebRTC. The framework includes a Pixel Streaming plugin in the engine, a ...
Unreal Render Hardware Interface (RHI)
The Render Hardware Interface is Unreal's abstraction over graphics APIs (Direct3D 11/12, Vulkan, Metal, OpenGL ES). Engine and plugin developers write rendering code against th...
Unreal Plugins and Fab Marketplace
Unreal Engine has a first-class plugin architecture and a content and code marketplace. The historical Unreal Engine Marketplace was consolidated into Fab, Epic's unified conten...
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Unreal Engine Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Unreal Engine Finops
FINOPSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Unreal Engine — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 2
Reference material describing how the API behaves
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Learn 2
Tutorials, courses, talks, and written guidance
Operate 5
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/unreal-engine · machine-readable index on apis.io