Ollama MCP Server

🚀 Ollama MCP Server

🚀 A powerful bridge between Ollama and the Model Context Protocol (MCP), enabling seamless integration of Ollama's local LLM capabilities into your MCP-powered applications.

This is a rebooted and actively maintained fork.
Original project: NightTrek/Ollama-mcp

This repository (hyzhak/ollama-mcp-server) is a fresh upstream with improved maintenance, metadata, and publishing automation.

See NightTrek/Ollama-mcp for project history and prior releases.

✨ Features

Complete Ollama Integration

• Full API Coverage: Access all essential Ollama functionality through a clean MCP interface
• OpenAI-Compatible Chat: Drop-in replacement for OpenAI's chat completion API
• Local LLM Power: Run AI models locally with full control and privacy

Core Capabilities

• 🔄 Model Management

  • Pull models from registries
  • Push models to registries
  • List available models
  • Create custom models from Modelfiles
  • Copy and remove models

• 🤖 Model Execution

  • Run models with customizable prompts (response is returned only after completion; streaming is not supported in stdio mode)
  • Vision/multimodal support: pass images to compatible models
  • Chat completion API with system/user/assistant roles
  • Configurable parameters (temperature, timeout)
  • NEW: think parameter for advanced reasoning and transparency (see below)
  • Raw mode support for direct responses

• 🛠 Server Control

  • Start and manage Ollama server
  • View detailed model information
  • Error handling and timeout management

🚀 Quick Start

Prerequisites

• Ollama installed on your system
• Node.js (with npx, included with npm)

Configuration

Add the server to your MCP configuration:

For Claude Desktop:

MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ollama": {
      "command": "npx",
      "args": ["ollama-mcp-server"],
      "env": {
        "OLLAMA_HOST": "http://127.0.0.1:11434"  // Optional: customize Ollama API endpoint
      }
    }
  }
}

📦 Installation

Prerequisites

• Ollama installed on your system
• Node.js and npm

Steps

1. Install dependencies:

npm install

2. Build the server:

npm run build

💻 Usage Examples

Pull and Run a Model

// Pull a model
await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "pull",
  arguments: {
    name: "llama2"
  }
});

// Run the model
await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "run",
  arguments: {
    name: "llama2",
    prompt: "Explain quantum computing in simple terms"
  }
});

Run a Vision/Multimodal Model

// Run a model with an image (for vision/multimodal models)
await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "run",
  arguments: {
    name: "gemma3:4b",
    prompt: "Describe the contents of this image.",
    imagePath: "./path/to/image.jpg"
  }
});

Chat Completion (OpenAI-compatible)

await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "chat_completion",
  arguments: {
    model: "llama2",
    messages: [
      {
        role: "system",
        content: "You are a helpful assistant."
      },
      {
        role: "user",
        content: "What is the meaning of life?"
      }
    ],
    temperature: 0.7
  }
});

// Chat with images (for vision/multimodal models)
await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "chat_completion",
  arguments: {
    model: "gemma3:4b",
    messages: [
      {
        role: "system",
        content: "You are a helpful assistant."
      },
      {
        role: "user",
        content: "Describe the contents of this image.",
        images: ["./path/to/image.jpg"]
      }
    ]
  }
});

Note: The images field is optional and only supported by vision/multimodal models.

Create Custom Model

await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "create",
  arguments: {
    name: "custom-model",
    modelfile: "./path/to/Modelfile"
  }
});

Advanced Reasoning with the think Parameter

Both the run and chat_completion tools now support an optional think parameter:

• think: true: Requests the model to provide step-by-step reasoning or "thought process" in addition to the final answer (if supported by the model).
• think: false (default): Only the final answer is returned.

Example (run tool):

await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "run",
  arguments: {
    name: "deepseek-r1:32b",
    prompt: "how many r's are in strawberry?",
    think: true
  }
});

• If the model supports it, the response will include a <think>...</think> block with detailed reasoning before the final answer.

Example (chat_completion tool):

await mcp.use_mcp_tool({
  server_name: "ollama",
  tool_name: "chat_completion",
  arguments: {
    model: "deepseek-r1:32b",
    messages: [
      { role: "user", content: "how many r's are in strawberry?" }
    ],
    think: true
  }
});

• The model's reasoning (if provided) will be included in the message content.

Note: Not all models support the think parameter. Advanced models (e.g., "deepseek-r1:32b", "magistral") may provide more detailed and accurate reasoning when think is enabled.

🔧 Technical Details

• OLLAMA_HOST: Configure custom Ollama API endpoint (default: http://127.0.0.1:11434)
• Timeout settings for model execution (default: 60 seconds)
• Temperature control for response randomness (0-2 range)

🤝 Contributing

Contributions are welcome! Feel free to:

• Report bugs
• Suggest new features
• Submit pull requests

📄 License

MIT License - feel free to use in your own projects!

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