# KADCAD > Browser-based 3D planner for plots and gardens (Czech/Slovak cadastre or a free rectangular plot). An AI agent can drive it through the JavaScript API `window.k3d` on the page. ## Docs - [Agent guide (HTML)](https://www.kadcad.cz/agent): how to connect, conventions, full API reference, recipes - [Agent guide (Markdown)](https://www.kadcad.cz/agent.md): same document as plain Markdown ## Optional - [Application](https://www.kadcad.cz/): the planner itself