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Meta·Aug 25, 2025·v0.5.3·open source

Immersive Web SDK (IWSDK)

The Immersive Web SDK (IWSDK) is an open-source framework designed to simplify WebXR development by providing a high-performance Entity Component System (ECS) and pre-built systems for physics, spatial audio, and interactions. It features an AI-native development workflow that allows AI agents to see, interact with, and debug 3D scenes in real-time using the Model Context Protocol (MCP).

WebXRThree.jsAI-Assisted DevelopmentSpatial Computing
overview

The Immersive Web SDK (IWSDK) is an open-source framework designed to simplify WebXR development by providing a high-performance Entity Component System (ECS) and pre-built systems for physics, spatial audio, and interactions. It features an AI-native development workflow that allows AI agents to see, interact with, and debug 3D scenes in real-time using the Model Context Protocol (MCP).

key features
  • 01High-performance Entity Component System (ECS) built on Three.js
  • 02AI-native development workflow with 52 MCP tools for autonomous debugging and scene composition
  • 03Production-ready XR systems including physics, spatial audio, and grab interactions
  • 04First-class spatial UI authoring using UIKitML with HTML-like syntax
  • 05Built-in XR emulation for desktop browsers without requiring VR hardware
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