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mcp-vcd

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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

Install Server
A
license - permissive license
A
quality
D
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

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Tools

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  • Verilator MCP Server

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  • wavekit-mcp

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    An MCP server that provides AI assistants with a persistent, sandboxed Python environment for waveform analysis, enabling loading and manipulation of VCD/FST/FSDB files and temporal pattern matching.
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