Helm MCP server for AI agents

The MCP Helm Server provides a standardized way for AI assistants to interact with Helm repositories and charts without requiring local Helm installation. It enables querying Helm repositories, retrieving chart information, and accessing chart values, helping to prevent LLMs from fabricating chart formats or contents.

Features

The MCP Helm server offers several tools for working with Helm repositories:

list_repository_charts - Lists all charts available in a Helm repository
get_latest_version_of_chart - Retrieves the latest version of a specific chart
get_chart_values - Retrieves the values file for a chart (latest or specific version)
get_chat_contents - Retrieves the contents of a chart (templates, values, metadata)
get_chat_dependencies - Retrieves the dependencies defined in Chart.yaml

Public Demo Instance

You can try the MCP Helm server without installation using a publicly available instance: https://mcp-helm.zekker.dev/sse

Installation Options

Using Docker

The simplest way to run the MCP Helm server is with Docker:

docker run -d --name mcp-helm -p 8012:8012 ghcr.io/zekker6/mcp-helm:v0.0.5 -mode=sse

The -mode=sse flag enables Server-Sent Events mode used by MCP clients. Alternatively, use -mode=http for Streamable HTTP mode.

Using Pre-built Binary

Download a binary from the releases page:

latest=$(curl -s https://api.github.com/repos/zekker6/mcp-helm/releases/latest | grep 'tag_name' | cut -d\" -f4)
wget https://github.com/zekker6/mcp-helm/releases/download/$latest/mcp-helm_Linux_x86_64.tar.gz
tar axvf mcp-helm_Linux_x86_64.tar.gz

Using Mise

If you use mise-en-place for development environment setup:

mise i ubi:zekker6/mcp-helm@latest

Using Go

For Go users (requires Go 1.24.3):

go install github.com/zekker6/mcp-helm/cmd/mcp-helm@latest

Building from Source

If you prefer to build from source (requires Go 1.24.3):

Clone the repository:

git clone https://github.com/zekker6/mcp-helm.git
cd mcp-helm

Build the binary:
```
go build -o mcp-helm ./cmd/mcp-helm
```
Run the server:
```
./mcp-helm
```

Using the Server

Configure your MCP client to connect to this server. The server implements the standard MCP protocol for tool discovery and execution.

By default, the server runs on port 8012. You can connect to it using any MCP-compatible client and utilize the tools provided by the server to interact with Helm repositories and charts.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "helm" '{"command":"mcp-helm","args":["-mode=sse"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "helm": {
            "command": "mcp-helm",
            "args": [
                "-mode=sse"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "helm": {
            "command": "mcp-helm",
            "args": [
                "-mode=sse"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect