Pascal Editor
An open-source, local-first 3D architectural editor built with React Three Fiber and WebGPU, usable from the browser or a CLI, with MCP tools for connecting AI agents.
Pascal Editor is an open-source, local-first 3D building editor built with React Three Fiber and WebGPU. It runs in the browser or from a command-line interface, and can connect AI agents through the Model Context Protocol.
Its CLI starts the editor together with an authenticated local MCP service, choosing free loopback ports automatically and storing projects in a local SQLite-backed data directory; the web editor runtime itself downloads once per version and is checked against a published digest. An agent can also connect directly to the MCP service without starting the full editor process.
It requires Node.js 22.13 or newer, installs through its own CLI package or npm, and is written in TypeScript under the MIT license.