# Sphere XG API Documentation

> Comprehensive guides for understanding and using the Sphere XG APIs.

- [Table of Contents](TableOfContents.md): Complete listing of all knowledge base guides organized by topic with descriptions
- [HoloBuilder and Sphere XG](HoloBuilder-And-Sphere-XG.md): Why the HoloBuilder-to-Sphere XG rename doesn't affect API integrations; the holobuilder.com domains are stable and phasing out the HoloBuilder UIs is a frontend-only change
- [OpenAPI Specification](https://v2.project.api.holobuilder.com/swagger/v1/swagger.json): Machine-readable API contract with all endpoints, schemas, and request/response shapes
- [RapiDoc UI](https://v2.project.api.holobuilder.com/rapidoc): Interactive API documentation browser