Koskamo

J-Link MCP

An MCP server that connects AI assistants to embedded hardware via SEGGER J-Link debug probes. It allows LLMs to flash firmware, halt and step execution, stream RTT logs, and decode ARM Cortex-M faults by reading registers and memory against real hardware targets like the nRF52840-DK.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

J-Link MCP logo, by KlievanCommunity listingLocal stdioSource reviewed; not executedPublished by Klievan
Vendor documentation

What you can do with it

  • Diagnose CPU crashes and decode fault registers
  • Read peripheral registers using CMSIS-SVD files
  • Stream Real-Time Transfer (RTT) logs from devices
  • Flash and control embedded firmware execution

Source and maintenance

Community listingRegistry 0.8.0
mcp-registry: io.github.Klievan/jlink-mcp@0.8.0Source repositoryProject website
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

jlink-mcp 0.8.0

npm
jlink-mcp package definition
{
  "version": "0.8.0",
  "transport": "stdio",
  "identifier": "jlink-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "JLINK_DEVICE",
      "isRequired": true,
      "description": "Target device name, exactly as J-Link spells it (e.g. nRF52840_XXAA, STM32F407VG). Use the search_devices tool to find it."
    },
    {
      "name": "JLINK_SERIAL",
      "description": "Serial number of a specific probe, when more than one is attached."
    },
    {
      "name": "SVD_PATH",
      "description": "CMSIS-SVD file for the target. Without it, peripheral reads are undecoded hex."
    },
    {
      "name": "JLINK_RTT_ADDR",
      "description": "Address of the firmware's _SEGGER_RTT symbol. Lets RTT survive a reset or flash."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "j-link-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jlink-mcp@0.8.0"
      ],
      "env": {
        "JLINK_DEVICE": "<YOUR_JLINK_DEVICE>",
        "JLINK_SERIAL": "<YOUR_JLINK_SERIAL>",
        "SVD_PATH": "<YOUR_SVD_PATH>",
        "JLINK_RTT_ADDR": "<YOUR_JLINK_RTT_ADDR>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "j-link-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jlink-mcp@0.8.0"
      ],
      "env": {
        "JLINK_DEVICE": "<YOUR_JLINK_DEVICE>",
        "JLINK_SERIAL": "<YOUR_JLINK_SERIAL>",
        "SVD_PATH": "<YOUR_SVD_PATH>",
        "JLINK_RTT_ADDR": "<YOUR_JLINK_RTT_ADDR>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "j-link-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jlink-mcp@0.8.0"
      ],
      "env": {
        "JLINK_DEVICE": "<YOUR_JLINK_DEVICE>",
        "JLINK_SERIAL": "<YOUR_JLINK_SERIAL>",
        "SVD_PATH": "<YOUR_SVD_PATH>",
        "JLINK_RTT_ADDR": "<YOUR_JLINK_RTT_ADDR>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "j-link-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jlink-mcp@0.8.0"
      ],
      "env": {
        "JLINK_DEVICE": "<YOUR_JLINK_DEVICE>",
        "JLINK_SERIAL": "<YOUR_JLINK_SERIAL>",
        "SVD_PATH": "<YOUR_SVD_PATH>",
        "JLINK_RTT_ADDR": "<YOUR_JLINK_RTT_ADDR>"
      }
    }
  }
}

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