PhysBox: MCP - Server for local simulation apps
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# PhysBox: MCP PhysBox: MCP is a Model Context Protocol (MCP) server that enables LLMs and MCP clients (such as Claude Code or Claude Desktop) to interact programmatically with the four simulation web applications in the browser: | Application | Production URL | Description | |---|---|---| | **Volt** | [volt.physbox.io](https://volt.physbox.io) | SPICE circuit simulation (powered by NgSpice WASM in browser) | | **Mesh** | [mesh.physbox.io](https://mesh.physbox.io) | Rigid-body physics simulation & OpenSCAD parametric CAD (powered by MuJoCo WASM) | | **Etch** | [etch.physbox.io](https://etch.physbox.io) | 2D vector studio, CNC toolpathing & WebSerial GRBL controller | | **Flux** (Coming Soon) | [flux.physbox.io](https://flux.physbox.io) | Discrete-event / system-dynamics simulation | All communication is handled via JSON over WebSockets directly to the web app in your browser—no browser automation or DOM scraping is needed. ### 🧠 The Only AI-Native Physical World Model Unlike static code generation or offline file outputs, PhysBox gives AI agents an **interactive ground-truth world model**. LLMs execute 117 typed tool calls to observe spatial kinematics, circuit node waveforms, and G-code safety warnings, allowing them to self-correct designs iteratively. --- ## 💬 Example Agent Prompts for Claude Code & Cursor Paste any of these prompts directly into your MCP-connected agent: * **Volt (Electronics):** > *"Optimize the RC filter values in the active Volt schematic to achieve a 1 kHz cutoff frequency, then execute `circuit_run_sim` and plot the magnitude response."* * **Mesh (3D Physics & CAD):** > *"Write an OpenSCAD parametric mounting bracket in Mesh with 4mm screw holes, run a MuJoCo collision stability check using `physics_check_collisions`, and export the Z-up STL."* * **Etch (CNC & Laser):** > *"Import this vector SVG logo, apply 2-pass 3mm stepdown feeds for Plywood, check end mill safety warnings, and generate GRBL G-code."* * **Your own works…
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