---
slug: "unsloth-mcp-server"
source_type: "readme"
source_url: "https://cdn.jsdelivr.net/gh/ototao/unsloth-mcp-server@main/README.md"
repo: "https://github.com/ototao/unsloth-mcp-server"
source_file: "README.md"
branch: "main"
---
[![MseeP.ai Security Assessment Badge](https://mseep.net/pr/ototao-unsloth-mcp-server-badge.png)](https://mseep.ai/app/ototao-unsloth-mcp-server)

# Unsloth MCP Server

An MCP server for [Unsloth](https://github.com/unslothai/unsloth) - a library that makes LLM fine-tuning 2x faster with 80% less memory.

## What is Unsloth?

Unsloth is a library that dramatically improves the efficiency of fine-tuning large language models:

- **Speed**: 2x faster fine-tuning compared to standard methods
- **Memory**: 80% less VRAM usage, allowing fine-tuning of larger models on consumer GPUs
- **Context Length**: Up to 13x longer context lengths (e.g., 89K tokens for Llama 3.3 on 80GB GPUs)
- **Accuracy**: No loss in model quality or performance

Unsloth achieves these improvements through custom CUDA kernels written in OpenAI's Triton language, optimized backpropagation, and dynamic 4-bit quantization.

## Features

- Optimize fine-tuning for Llama, Mistral, Phi, Gemma, and other models
- 4-bit quantization for efficient training
- Extended context length support
- Simple API for model loading, fine-tuning, and inference
- Export to various formats (GGUF, Hugging Face, etc.)

## Installation

> **Current state:** install from source (below). The package is prepared for npm
> (`name`, `bin`, `server.json` registry manifest are in place) but is **not yet
> published** — the `npx`-based config in the next section works only after the
> npm publish lands.

1. Install Unsloth on the machine that will run the fine-tuning: `pip install unsloth`
2. Build the server from source:

   ```bash
   git clone https://github.com/OtotaO/unsloth-mcp-server.git
   cd unsloth-mcp-server
   npm install
   npm run build
   ```

3. Point your MCP client (**Claude Desktop**, **Claude Code**, **Cline**, **Cursor**, …) at the built entrypoint:

   ```json
   {
     "mcpServers": {
       "unsloth": {
         "command": "node",
         "args": ["/path/to/unsloth-mcp-server/build/index.js"],
         "env": { "HUGGINGFACE_TOKEN": "your_token_here" }
       }
     }
   }
   ```

   `HUGGINGFACE_TOKEN` is optional (only needed for gated/private models). Omit the `env` block if you don't use one.

### After npm publish (planned)

Once published to npm as `unsloth-mcp-server`, the same clients can run it over stdio via `npx` with no clone/build:

```json
{
  "mcpServers": {
    "unsloth": {
      "command": "npx",
      "args": ["-y", "unsloth-mcp-server"],
      "env": { "HUGGINGFACE_TOKEN": "your_token_here" }
    }
  }
}
```

For **Claude Code**: `claude mcp add unsloth -- npx -y unsloth-mcp-server`

## Available Tools

### check_installation

Verify if Unsloth is properly installed on your system.

**Parameters**: None

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "check_installation",
  arguments: {}
});
```

### list_supported_models

Get a list of all models supported by Unsloth, including Llama, Mistral, Phi, and Gemma variants.

**Parameters**: None

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "list_supported_models",
  arguments: {}
});
```

### load_model

Load a pretrained model with Unsloth optimizations for faster inference and fine-tuning.

**Parameters**:
- `model_name` (required): Name of the model to load (e.g., "unsloth/Llama-3.2-1B")
- `max_seq_length` (optional): Maximum sequence length for the model (default: 2048)
- `load_in_4bit` (optional): Whether to load the model in 4-bit quantization (default: true)
- `use_gradient_checkpointing` (optional): Whether to use gradient checkpointing to save memory (default: true)

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "load_model",
  arguments: {
    model_name: "unsloth/Llama-3.2-1B",
    max_seq_length: 4096,
    load_in_4bit: true
  }
});
```

### finetune_model

Fine-tune a model with Unsloth optimizations using LoRA/QLoRA techniques.

**Parameters**:
- `model_name` (required): Name of the model to fine-tune
- `dataset_name` (required): Name of the dataset to use for fine-tuning
- `output_dir` (required): Directory to save the fine-tuned model
- `max_seq_length` (optional): Maximum sequence length for training (default: 2048)
- `lora_rank` (optional): Rank for LoRA fine-tuning (default: 16)
- `lora_alpha` (optional): Alpha for LoRA fine-tuning (default: 16)
- `batch_size` (optional): Batch size for training (default: 2)
- `gradient_accumulation_steps` (optional): Number of gradient accumulation steps (default: 4)
- `learning_rate` (optional): Learning rate for training (default: 2e-4)
- `max_steps` (optional): Maximum number of training steps (default: 100)
- `dataset_text_field` (optional): Field in the dataset containing the text (default: 'text')
- `load_in_4bit` (optional): Whether to use 4-bit quantization (default: true)

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "finetune_model",
  arguments: {
    model_name: "unsloth/Llama-3.2-1B",
    dataset_name: "tatsu-lab/alpaca",
    output_dir: "./fine-tuned-model",
    max_steps: 100,
    batch_size: 2,
    learning_rate: 2e-4
  }
});
```

### generate_text

Generate text using a fine-tuned Unsloth model.

**Parameters**:
- `model_path` (required): Path to the fine-tuned model
- `prompt` (required): Prompt for text generation
- `max_new_tokens` (optional): Maximum number of tokens to generate (default: 256)
- `temperature` (optional): Temperature for text generation (default: 0.7)
- `top_p` (optional): Top-p for text generation (default: 0.9)

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "generate_text",
  arguments: {
    model_path: "./fine-tuned-model",
    prompt: "Write a short story about a robot learning to paint:",
    max_new_tokens: 512,
    temperature: 0.8
  }
});
```

### export_model

Export a fine-tuned Unsloth model to various formats for deployment.

**Parameters**:
- `model_path` (required): Path to the fine-tuned model
- `export_format` (required): Format to export to (gguf, ollama, vllm, huggingface)
- `output_path` (required): Path to save the exported model
- `quantization_bits` (optional): Bits for quantization (for GGUF export) (default: 4)

**Example**:
```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "export_model",
  arguments: {
    model_path: "./fine-tuned-model",
    export_format: "gguf",
    output_path: "./exported-model.gguf",
    quantization_bits: 4
  }
});
```

## Advanced Usage

### Custom Datasets

You can use custom datasets by formatting them properly and hosting them on Hugging Face or providing a local path:

```javascript
const result = await use_mcp_tool({
  server_name: "unsloth",
  tool_name: "finetune_model",
  arguments: {
    model_name: "unsloth/Llama-3.2-1B",
    dataset_name: "json",
    data_files: {"train": "path/to/your/data.json"},
    output_dir: "./fine-tuned-model"
  }
});
```

### Memory Optimization

For large models on limited hardware:
- Reduce batch size and increase gradient accumulation steps
- Use 4-bit quantization
- Enable gradient checkpointing
- Reduce sequence length if possible

## Troubleshooting

### Common Issues

1. **CUDA Out of Memory**: Reduce batch size, use 4-bit quantization, or try a smaller model
2. **Import Errors**: Ensure you have the correct versions of torch, transformers, and unsloth installed
3. **Model Not Found**: Check that you're using a supported model name or have access to private models

### Version Compatibility

- Python: 3.10, 3.11, or 3.12 (not 3.13)
- CUDA: 11.8 or 12.1+ recommended
- PyTorch: 2.0+ recommended

## Performance Benchmarks

| Model | VRAM | Unsloth Speed | VRAM Reduction | Context Length |
|-------|------|---------------|----------------|----------------|
| Llama 3.3 (70B) | 80GB | 2x faster | >75% | 13x longer |
| Llama 3.1 (8B) | 80GB | 2x faster | >70% | 12x longer |
| Mistral v0.3 (7B) | 80GB | 2.2x faster | 75% less | - |

## Requirements

- Python 3.10-3.12
- NVIDIA GPU with CUDA support (recommended)
- Node.js and npm

## License

Apache-2.0