USIUSIUnified Simulator Interface
USI SDK REFERENCE

One aircraft. One API.

Browse 935 public types generated from the current USI assemblies. Start with a module, search the complete API, or follow the guided concepts.

MODULES

Explore the SDK by responsibility

All classes →
Core 430 public types

Connections, results, capabilities, measurements, diagnostics, and the root USI object.

 Aircraft 255 public types

The unified aircraft graph: controls, propulsion, systems, avionics, navigation, and automation.

 Simulator Services 103 public types

Lifecycle, world, facilities, traffic, presentation, policies, replay, and extensibility.

 Weather 52 public types

Live simulator atmosphere plus normalized global aviation weather products.

 Flight Planning 33 public types

SimBrief operational plans, weather enrichment, and simulator import.

 AI 35 public types

Permission-aware assistants, speech, language models, and simulator-grounded integrations.

 MCP 18 public types

A governed Model Context Protocol server over the same unified SDK operations.

 Provider Development 9 public types

Contracts for adding future simulator providers below the stable developer boundary.

01

Getting started

Detect, connect, read normalized flight data, and disconnect.

 02

Architecture concepts

Top stack, bottom stack, normalization, preferences, results, and capabilities.

 03

Provider support

Understand semantic coverage across MSFS 2020, MSFS 2024, and X-Plane 12.