nvidia-usdcode-mcp-server

A minimal MCP server that exposes a single tool backed by NVIDIA USDCode via the NVIDIA Integrate API. Great for Isaac Sim scripting tips, USD, Python snippets, and API usage.

Requirements

• Node.js 18+

• An NVIDIA API key in NVIDIA_API_KEY, get it from here https://build.nvidia.com/nvidia/usdcode

You can place it in a local .env file (loaded automatically) or export it in your shell.

Related MCP server: openusd-mcp

Quickstart

Dependencies are already vendored in this workspace. If you need to reinstall:

• npm ci or npm install

Build

• npm run build

Outputs to dist/.

Run (standalone)

• npm start (after building)

• Or directly: node --enable-source-maps dist/server.js

The server speaks MCP over stdio and is intended to be launched by an MCP-capable client.

Use with Claude Desktop

Add an entry to your ~/.claude/config.json:

{
  "mcpServers": {
    "usdcode": {
      "command": "node",
      "args": ["dist/server.js"],
      "env": { "NVIDIA_API_KEY": "YOUR_KEY" }, // if you didn't add .env to this project
      "disabled": false
    }
  }
}

Use with OpenAI Codex

Add an entry to your ~/.codex/config.toml:

[mcp_servers.usdcode]
command = "node"
args = ["/absolute/path/to/mcp-usdcode/dist/server.js"]
env = { "NVIDIA_API_KEY" = "value" }

Tool Info

• name: get_usdcode_help

• description: Ask NVIDIA USDCode for help.

• params:

  • question (string, required): Your prompt or question.

  • temperature (number, optional, default 0.1)

  • top_p (number, optional, default 1)

  • max_tokens (integer, optional, default 1024)

  • expert_type (string, optional, default "auto")

Returns a single text message with the model’s reply.