jan-terminal-mcp
An MCP server that gives Jan AI terminal and code execution capabilities, enabling shell commands, multi-language code execution, file manipulation, and git operations locally.
README
jan-terminal-mcp
Jan AI has no native terminal or code execution. This gives it that.
An MCP server that gives your local Jan model real hands on your machine — run shell commands, execute code in 14 languages, read/write files, and use git. All locally, all private.
Includes a fine-tuned 4B model trained specifically to call these tools reliably instead of just describing what it would do.
Tools
| Tool | Description |
|---|---|
run_shell |
Run any PowerShell command |
git |
Run git commands in any repo |
read_file |
Read any file's contents |
write_file |
Write or overwrite a file |
list_dir |
List files and folders in a directory |
edit_file |
Replace a specific substring in a file — smarter than rewriting the whole thing |
run_python |
Execute Python code directly and return output |
run_cpp |
Compile and run C++ code (g++), returns errors + output |
run_code |
Execute code in any language — Python, JavaScript, TypeScript, Java, C++, C#, Go, Rust, Ruby, PHP, R, Kotlin, Swift, MATLAB |
Fine-tuned model
AItrainer1/jancoder-4b-gguf a 4B model fine-tuned via QLoRA on tool-use conversations generated specifically for this tool schema.
Stock models at this size tend to describe what they'd do rather than actually calling tools. This model was trained to call them correctly and consistently.
Drop the GGUF into Jan and it works out of the box with this MCP server.
The Kaggle training notebook is at kaggle_finetune.ipynb.
Install
pip install jan-terminal-mcp
Setup in Jan AI
- Open Jan, Settings, MCP Servers
- Click Add and paste this config:
{
"jan-terminal": {
"command": "jan-terminal-mcp",
"args": [],
"env": {},
"active": true
}
}
Or edit %APPDATA%\Jan\data\mcp_config.json directly and add the block above inside "mcpServers".
- Restart Jan - the server appears as Jan-Terminal with a green dot.
Requirements
- Windows (PowerShell required for
run_shell) - Python 3.10+
- Jan AI v0.7.9+
pip install mcp>=2.0.0
Bugs
Report bugs and stuff to ISSUE
License
MIT
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