J-Link MCP Server: Install & Setup

Install J-Link in Claude Code

Claude Code

claude mcp add j-link -e JLINK_DEVICE=... -- npx -y jlink-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "j-link": {
      "command": "npx",
      "args": [
        "-y",
        "jlink-mcp"
      ],
      "env": {
        "JLINK_DEVICE": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the J-Link MCP server do?

Debug embedded firmware on real hardware: J-Link probes, Cortex-M faults, RTT logs, GDB.

Is the J-Link MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does J-Link run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add J-Link to Claude Code?

Run: claude mcp add j-link -e JLINK_DEVICE=... -- npx -y jlink-mcp

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