Spline has released V2, a major architectural rebuild of its 3D design software that allows external coding agents to edit live, editable scenes directly.
The Spline MCP Server Integration
According to developer documentation and release announcements, the update introduces the Spline MCP Server. This feature bridges the gap between design tools and AI-powered code assistants like Claude Code, Cursor, Codex, Google Antigravity, and VS Code.
Desktop Application and Protocol Setup
The Model Context Protocol (MCP) server is bundled directly into Spline’s desktop application for macOS and Windows, meaning it does not function inside web browsers. When a developer launches the desktop app, the software scans for supported AI clients and automatically registers the local server within their configuration files.
Executing Live Code and Prompting
Developers then restart their chosen AI client and prompt it normally. For instance, prompting Claude Code to build a floating island translates the request into structured MCP tool calls. Spline then routes those calls directly to an open 3D editor tab, executing changes against the live document while keeping the underlying structure fully editable.
Bridging Design Tools and Coding Environments
Before this update, users typically had to manage separate conversations and export files back and forth between design software and coding environments. The inclusion of MCP support allows coding agents that already understand an active codebase to manipulate the design environment natively.
Reducing Context-Switching for Developers
Alongside external agent support, Spline V2 includes a built-in AI agent capable of generating and modifying scenes directly from text prompts inside the application. This dual-layer approach aims to reduce context-switching for developers building interactive 3D web experiences.
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