How do I use mcp-vcd?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@mcp-vcd show me the value changes for signal clk from 100 to 200 ns" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

mcp-vcd

by key2

Overview Schema Related Servers Score Discussions

Python

Local

mcp-vcd

A Model Context Protocol (MCP) server for analyzing VCD waveforms and GTKWave save files (.gtkw).

Give your AI assistant direct access to hardware simulation results — signal values, bus definitions, display formats, and signal groupings — without dumping entire files into the context window.

Tools

Tool	Description
`get-signal`	Get all value changes of a signal from a VCD file. Supports optional `start_time` / `end_time` range filtering.
`load-gtkw`	Parse a `.gtkw` save file and return its full structure: metadata, signals, buses, and groups.
`get-signal-groups`	Return the group hierarchy defined in a `.gtkw` file.
`get-bus-signals`	Return the component signals of a named bus from a `.gtkw` file.
`get-signal-with-format`	Get signal values from a VCD, formatted according to `.gtkw` display hints (hex, decimal, binary, etc.).

Related MCP server: Verilator MCP Server

Installation

uv pip install mcp-vcd

Claude Desktop

Add to your claude_desktop_config.json:

"mcpServers": {
  "mcp-vcd": {
    "command": "uv",
    "args": [
      "run",
      "mcp-vcd"
    ]
  }
}

See Anthropic's MCP documentation for more info.

License

MIT

This server cannot be installed

license - permissive license

quality - not tested

maintenance

How are these scores calculated?

Resources

GitHub Repository

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