helm-mcp 0.1.18

MCP server exposing all Helm CLI capabilities via the Model Context Protocol

helm-mcp (Python)

A Python MCP wrapper for the helm-mcp Go server.

Uses FastMCP to create a transparent proxy around the helm-mcp Go binary, exposing all Helm tools via the Model Context Protocol. New tools added to the Go binary are automatically available without any Python code changes.

Requirements

• Python 3.14+
• The helm-mcp Go binary is automatically downloaded on first use (with SHA256 checksum verification)

Installation

pip install helm-mcp

Quick Start

As a server

from helm_mcp import create_server

server = create_server()
server.run()  # stdio mode (default)

As a client

import asyncio
from helm_mcp import create_client

async def main():
    async with create_client() as client:
        tools = await client.list_tools()
        print(f"Available tools: {len(tools)}")

        result = await client.call_tool("helm_list", {"namespace": "default"})
        print(result)

asyncio.run(main())

CLI

# stdio mode (default, for MCP clients like Claude Code)
helm-mcp-python

# HTTP mode
helm-mcp-python --transport http --host 0.0.0.0 --port 8080

# Pre-download binary
helm-mcp-python --setup

# Explicit binary path
helm-mcp-python --binary /usr/local/bin/helm-mcp

Binary Discovery

The package locates the helm-mcp Go binary in this order:

1. HELM_MCP_BINARY environment variable
2. Bundled binary in the package bin/ directory
3. Auto-download from GitHub Releases (with SHA256 checksum verification)
4. helm-mcp on PATH

Environment Variables

The proxy forwards these environment variables to the Go binary:

Category	Variables
Proxy	HTTP_PROXY, HTTPS_PROXY, NO_PROXY (and lowercase variants)
Kubernetes	KUBECONFIG, KUBERNETES_SERVICE_HOST, KUBERNETES_SERVICE_PORT
Helm	HELM_CACHE_HOME, HELM_CONFIG_HOME, HELM_DATA_HOME, HELM_PLUGINS, HELM_DEBUG
AWS	AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, AWS_REGION, AWS_PROFILE
GCP	GOOGLE_APPLICATION_CREDENTIALS, CLOUDSDK_COMPUTE_ZONE
Azure	AZURE_TENANT_ID, AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, AZURE_SUBSCRIPTION_ID
TLS	SSL_CERT_FILE, SSL_CERT_DIR

Scalability

This package uses the MCP proxy pattern: the Python layer never needs to know about individual Helm tools. All tool discovery, input schemas, and invocations are forwarded to the Go binary via the MCP protocol at runtime. When new capabilities are added to the Go server, they are immediately available through the Python wrapper.

License

MIT