Helm MCP Server

Overview

Helm MCP provides a bridge between AI assistants and the Helm package manager for Kubernetes. It allows AI assistants to interact with Helm through natural language requests, executing commands like installing charts, managing repositories, and more.

Installation

Prerequisites

• Python 3.8+
• Docker (for containerized deployment)
• Helm CLI installed

Using Docker

Build and run the Docker container:

# Clone the repository
git clone https://github.com/modelcontextprotocol/servers.git
cd src/helm

# Build the Docker image
docker build -t mcp-helm .

Manual Installation

# Clone the repository
git clone https://github.com/modelcontextprotocol/servers.git
cd src/helm

# Install dependencies
uv venv
source .venv/Scripts/Activate.ps1
uv pip install -e .

# Run the server
mcp-server-helm

Tools

Here are the available tools in the Helm MCP server:

helm_completion

Generate autocompletion scripts for various shells.

• Parameters:
  • shell (required): The shell to generate the completion script for. Options are "bash", "fish", "powershell", "zsh".
• Example:

  helm_completion(shell="bash")
  

Chart Creation and Management

helm_create

Create a new chart with the given name.

• Parameters:
  • name (required): The name of the chart to create.
  • starter (optional): The name of the starter chart to use.
• Example:

  helm_create(name="mychart")
  

helm_lint

Runs a series of tests to verify that the chart is well-formed.

• Parameters:
  • chart_path (required): Path to the chart to lint.
  • values_file (optional): Path to values file.
  • set_values (optional): Set values on the command line (can specify multiple).
• Example:

  helm_lint(chart_path="./mychart")
  

helm_package

Packages a chart into a chart archive.

• Parameters:
  • chart_path (required): Path to the chart directory.
  • destination (optional): Location to write the chart.
  • app_version (optional): Set the appVersion on the chart.
  • version (optional): Set the version on the chart.
  • dependency_update (optional): Update dependencies before packaging.
• Example:

  helm_package(chart_path="./mychart")
  

helm_template

Renders chart templates locally and displays the output.

• Parameters:
  • chart (required): Chart name.
  • release_name (optional): Release name.
  • namespace (optional): Namespace.
  • values_file (optional): Values file.
  • set_values (optional): Set values.
  • api_versions (optional): Kubernetes API versions.
  • kube_version (optional): Kubernetes version.
• Example:

  helm_template(chart="./mychart", release_name="my-release")
  

Dependency Management

helm_dependency_build

Builds the chart's dependencies.

• Parameters:
  • chart_path (required): Path to the chart.
• Example:

  helm_dependency_build(chart_path="./mychart")
  

helm_dependency_list

Lists the dependencies for the given chart.

• Parameters:
  • chart_path (required): Path to the chart.
• Example:

  helm_dependency_list(chart_path="./mychart")
  

helm_dependency_update

Updates the chart's dependencies.

• Parameters:
  • chart_path (required): Path to the chart.
• Example:

  helm_dependency_update(chart_path="./mychart")
  

Environment

helm_env

Shows Helm's environment information.

• Parameters: None
• Example:

  helm_env()
  

helm_version

Shows the Helm version information.

• Parameters: None
• Example:

  helm_version()
  

Release Management

helm_install

Installs a chart.

• Parameters:
  • chart (required): Chart name.
  • release_name (optional): Release name.
  • namespace (optional): Namespace.
  • values_file (optional): Values file.
  • set_values (optional): Set values.
  • description (optional): Add a custom description.
  • wait (optional): Wait until all resources are ready.
  • atomic (optional): If set, installation rollback on failure.
  • timeout (optional): Time to wait for any operation to complete.
• Example:

  helm_install(chart="bitnami/nginx", release_name="my-nginx")
  

helm_uninstall

Uninstalls a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
  • keep_history (optional): Remove the release but keep the history.
  • no_hooks (optional): Prevent hooks from running during uninstallation.
• Example:

  helm_uninstall(release_name="my-nginx")
  

helm_upgrade

Upgrades a release.

• Parameters:
  • release_name (required): Release name.
  • chart (required): Chart name.
  • namespace (optional): Namespace.
  • values_file (optional): Values file.
  • set_values (optional): Set values.
  • install (optional): Install if release doesn't exist.
  • force (optional): Force resource updates.
  • wait (optional): Wait until all resources are ready.
  • atomic (optional): If set, upgrade rollback on failure.
  • timeout (optional): Time to wait for any operation to complete.
• Example:

  helm_upgrade(release_name="my-nginx", chart="bitnami/nginx", set_values={"replicaCount": "3"})
  

helm_rollback

Rolls back a release to a previous revision.

• Parameters:
  • release_name (required): Release name.
  • revision (optional): Revision number.
  • namespace (optional): Namespace.
  • wait (optional): Wait until all resources are ready.
  • force (optional): Force resource updates.
  • timeout (optional): Time to wait for any operation to complete.
• Example:

  helm_rollback(release_name="my-nginx", revision=1)
  

helm_list

Lists releases.

• Parameters:
  • all_namespaces (optional): List releases across all namespaces.
  • filter_ (optional): Filter by regex.
  • namespace (optional): Namespace.
  • deployed (optional): Show deployed releases.
  • failed (optional): Show failed releases.
  • uninstalled (optional): Show uninstalled releases.
• Example:

  helm_list()
  

helm_status

Displays the status of the named release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
  • revision (optional): Revision number.
• Example:

  helm_status(release_name="my-nginx")
  

helm_history

Gets the release history.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
  • max_ (optional): Maximum number of revisions to include.
• Example:

  helm_history(release_name="my-nginx")
  

helm_test

Runs tests for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
  • filter_ (optional): Filter tests by name.
  • timeout (optional): Time to wait for any operation to complete.
• Example:

  helm_test(release_name="my-nginx")
  

Release Information

helm_get_all

Gets all information about a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
• Example:

  helm_get_all(release_name="my-nginx")
  

helm_get_hooks

Gets the hooks for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
• Example:

  helm_get_hooks(release_name="my-nginx")
  

helm_get_manifest

Gets the manifest for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
• Example:

  helm_get_manifest(release_name="my-nginx")
  

helm_get_metadata

Gets the metadata for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
• Example:

  helm_get_metadata(release_name="my-nginx")
  

helm_get_notes

Gets the notes for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
• Example:

  helm_get_notes(release_name="my-nginx")
  

helm_get_values

Gets the values for a release.

• Parameters:
  • release_name (required): Release name.
  • namespace (optional): Namespace.
  • all_values (optional): Get all values (user-supplied values and defaults).
• Example:

  helm_get_values(release_name="my-nginx", all_values=true)
  

Repository Management

helm_repo_add

Adds a chart repository.

• Parameters:
  • name (required): Name of the repository.
  • url (required): URL of the repository.
  • username (optional): Username for repository.
  • password (optional): Password for repository.
  • pass_credentials (optional): Pass credentials to all domains.
• Example:

  helm_repo_add(name="bitnami", url="https://charts.bitnami.com/bitnami")
  

helm_repo_index

Generates an index file for a chart repository.

• Parameters:
  • directory (required): Directory containing packaged charts.
  • url (optional): URL of the repository.
  • merge (optional): Merge the generated index with the given index.
• Example:

  helm_repo_index(directory="./charts")
  

helm_repo_list

Lists chart repositories.

• Parameters: None
• Example:

  helm_repo_list()
  

helm_repo_remove

Removes a chart repository.

• Parameters:
  • name (required): Name of the repository.
• Example:

  helm_repo_remove(name="bitnami")
  

helm_repo_update

Updates chart repositories.

• Parameters: None
• Example:

  helm_repo_update()
  

helm_search_repo

Searches repositories for a keyword in charts.

• Parameters:
  • keyword (required): Search term.
  • regexp (optional): Use regular expressions for searching.
  • version (optional): Search using semantic version constraints.
  • versions (optional): Show all versions, not just the latest.
• Example:

  helm_search_repo(keyword="nginx")
  

helm_search_hub

Searches the Helm Hub for a keyword in charts.

• Parameters:
  • keyword (required): Search term.
  • max_results (optional): Maximum number of results to return.
  • repo_url (optional): Specific repo URL to search.
• Example:

  helm_search_hub(keyword="nginx")
  

Registry Management

helm_registry_login

Logs in to a registry.

• Parameters:
  • registry_url (required): Registry URL to authenticate with.
  • username (required): Username for registry.
  • password (required): Password for registry.
  • insecure (optional): Allow connections to TLS registry without certs.
• Example:

  helm_registry_login(registry_url="registry.example.com", username="user", password="pass123")
  

helm_registry_logout

Logs out from a registry.

• Parameters:
  • registry_url (required): Registry URL to logout from.
• Example:

  helm_registry_logout(registry_url="registry.example.com")
  

helm_push

Pushes a chart to a registry.

• Parameters:
  • chart_path (required): Path to the chart to push.
  • registry_url (required): Registry URL to push to.
  • insecure (optional): Allow connections to TLS registry without certs.
  • plain_http (optional): Use plain HTTP.
  • force (optional): Force push even if the chart already exists.
• Example:

  helm_push(chart_path="./mychart-1.0.0.tgz", registry_url="oci://registry.example.com/charts")
  

helm_pull

Downloads a chart from a repository.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
  • destination (optional): Directory to download to.
  • untar (optional): If set, untar the chart after downloading.
  • verify (optional): Verify the package against its signature.
  • keyring (optional): Path to the keyring containing public keys.
• Example:

  helm_pull(chart="nginx", repo="bitnami", version="13.2.0")
  

Chart Information

helm_show_all

Shows all information of a chart.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
• Example:

  helm_show_all(chart="nginx", repo="bitnami")
  

helm_show_chart

Shows the chart's definition.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
• Example:

  helm_show_chart(chart="nginx", repo="bitnami")
  

helm_show_crds

Shows the chart's CRDs.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
• Example:

  helm_show_crds(chart="prometheus-operator", repo="prometheus-community")
  

helm_show_readme

Shows the chart's README.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
• Example:

  helm_show_readme(chart="nginx", repo="bitnami")
  

helm_show_values

Shows the chart's values.

• Parameters:
  • chart (required): Chart name.
  • repo (optional): Repository name.
  • version (optional): Chart version.
• Example:

  helm_show_values(chart="nginx", repo="bitnami")
  

Plugin Management

helm_plugin_install

Installs a Helm plugin.

• Parameters:
  • plugin_url (required): URL to the plugin.
  • version (optional): Version of the plugin.
• Example:

  helm_plugin_install(plugin_url="https://github.com/chartmuseum/helm-push")
  

helm_plugin_list

Lists Helm plugins.

• Parameters: None
• Example:

  helm_plugin_list()
  

helm_plugin_uninstall

Uninstalls a Helm plugin.

• Parameters:
  • plugin_name (required): Name of the plugin.
• Example:

  helm_plugin_uninstall(plugin_name="push")
  

helm_plugin_update

Updates a Helm plugin.

• Parameters:
  • plugin_name (required): Name of the plugin.
• Example:

  helm_plugin_update(plugin_name="push")
  

Verification

helm_verify

Verifies that a chart at the given path has been signed and is valid.

• Parameters:
  • path (required): Path to the chart file.
  • keyring (optional): Path to the keyring containing public keys.
• Example:

  helm_verify(path="./mychart-1.0.0.tgz")
  

Configuration

Usage with Claude Desktop

Add this to your claude_desktop_config.json:

<details> <summary>Using uvx</summary>

"mcpServers": {
  "helm": {
    "command": "uvx",
    "args": ["mcp-server-helm"]
  }
}

</details> <details> <summary>Using docker</summary>

"mcpServers": {
  "helm": {
    "command": "docker",
    "args": ["run", "--rm", "-i", "mcp/helm"]
  }
}

</details>

Inspector

# run the inspector against the mcp-server-helm
npx @modelcontextprotocol/inspector uvx mcp-server-helm

Build

Docker build:

cd src/helm
docker build -t mcp/helm .

License

This MCP server is licensed under the MIT License. This means you are free to use, modify, and distribute the software, subject to the terms and conditions of the MIT License. For more details, please see the LICENSE file in the project repository.