Unsloth MCP Server

An MCP server for 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.)

Quick Start

Install Unsloth: pip install unsloth

Install and build the server:

cd unsloth-server
npm install
npm run build

Add to MCP settings:

{
  "mcpServers": {
    "unsloth-server": {
      "command": "node",
      "args": ["/path/to/unsloth-server/build/index.js"],
      "env": {
        "HUGGINGFACE_TOKEN": "your_token_here" // Optional
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

Available Tools

check_installation

Verify if Unsloth is properly installed on your system.

Parameters: None

Example:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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:

const result = await use_mcp_tool({
  server_name: "unsloth-server",
  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

CUDA Out of Memory: Reduce batch size, use 4-bit quantization, or try a smaller model
Import Errors: Ensure you have the correct versions of torch, transformers, and unsloth installed
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