MCP Server Kubernetes

MCP Server that can connect to a Kubernetes cluster and manage it. Supports loading kubeconfig from multiple sources in priority order.

https://github.com/user-attachments/assets/f25f8f4e-4d04-479b-9ae0-5dac452dd2ed

Installation & Usage

Prerequisites

Before using this MCP server with any tool, make sure you have:

kubectl installed and in your PATH
A valid kubeconfig file with contexts configured
Access to a Kubernetes cluster configured for kubectl (e.g. minikube, Rancher Desktop, GKE, etc.)
Helm v3 installed and in your PATH (no Tiller required). Optional if you don't plan to use Helm.

You can verify your connection by running kubectl get pods in a terminal to ensure you can connect to your cluster without credential issues.

By default, the server loads kubeconfig from ~/.kube/config. For additional authentication options (environment variables, custom paths, etc.), see ADVANCED_README.md.

Claude Code

Add the MCP server to Claude Code using the built-in command:

Terminal

claude mcp add kubernetes -- npx mcp-server-kubernetes

This will automatically configure the server in your Claude Code MCP settings.

Codex

Add the MCP server to Codex CLI using the built-in command:

bash

codex mcp add kubernetes -- npx mcp-server-kubernetes

This registers the server globally in ~/.codex/config.toml and makes its tools available in all Codex sessions.

Claude Desktop

Add the following configuration to your Claude Desktop config file:

config.json

{
  "mcpServers": {
    "kubernetes": {
      "command": "npx",
      "args": ["mcp-server-kubernetes"]
    }
  }
}

Claude Desktop Connector via mcpb

MCP Server Kubernetes is also available as a mcpb (formerly dxt) extension. In Claude Desktop, go to Settings (Cmd+, on Mac) -> Extensions -> Browse Extensions and scroll to find mcp-server-kubernetes in the modal. Install it & it will install & utilize kubectl via command line & your kubeconfig.

To manually install, you can also get the .mcpb by going to the latest Release and downloading it.

VS Code

For VS Code integration, you can use the MCP server with extensions that support the Model Context Protocol:

Install a compatible MCP extension (such as Claude Dev or similar MCP clients)
Configure the extension to use this server:

config.json

{
  "mcpServers": {
    "kubernetes": {
      "command": "npx",
      "args": ["mcp-server-kubernetes"],
      "description": "Kubernetes cluster management and operations"
    }
  }
}

Cursor

Cursor supports MCP servers through its AI integration. Add the server to your Cursor MCP configuration:

config.json

{
  "mcpServers": {
    "kubernetes": {
      "command": "npx",
      "args": ["mcp-server-kubernetes"]
    }
  }
}

The server will automatically connect to your current kubectl context. You can verify the connection by asking the AI assistant to list your pods or create a test deployment.

Usage with mcp-chat

mcp-chat is a CLI chat client for MCP servers. You can use it to interact with the Kubernetes server.

Terminal

npx mcp-chat --server "npx mcp-server-kubernetes"

Alternatively, pass it your existing Claude Desktop configuration file from above (Linux should pass the correct path to config):

Mac:

Terminal

npx mcp-chat --config "~/Library/Application Support/Claude/claude_desktop_config.json"

Windows:

Terminal

npx mcp-chat --config "%APPDATA%\Claude\claude_desktop_config.json"

Features

Connect to a Kubernetes cluster
Unified kubectl API for managing resources
- Get or list resources with kubectl_get
- Describe resources with kubectl_describe
- List resources with kubectl_get
- Create resources with kubectl_create
- Apply YAML manifests with kubectl_apply
- Delete resources with kubectl_delete
- Get logs with kubectl_logs
- Manage kubectl contexts with kubectl_context
- Explain Kubernetes resources with explain_resource
- List API resources with list_api_resources
- Scale resources with kubectl_scale
- Update field(s) of a resource with kubectl_patch
- Manage deployment rollouts with kubectl_rollout
- Execute any kubectl command with kubectl_generic
- Verify connection with ping
Advanced operations
- Scale deployments with kubectl_scale (replaces legacy scale_deployment)
- Port forward to pods and services with port_forward
- Run Helm operations
  - Install, upgrade, and uninstall charts
  - Support for custom values, repositories, and versions
  - Template-based installation (helm_template_apply) to bypass authentication issues
  - Template-based uninstallation (helm_template_uninstall) to bypass authentication issues
- Pod cleanup operations
  - Clean up problematic pods (cleanup_pods) in states: Evicted, ContainerStatusUnknown, Completed, Error, ImagePullBackOff, CrashLoopBackOff
- Node management operations
  - Cordoning, draining, and uncordoning nodes (node_management) for maintenance and scaling operations
Troubleshooting Prompt (k8s-diagnose)
- Guides through a systematic Kubernetes troubleshooting flow for pods based on a keyword and optional namespace.
Non-destructive mode for read and create/update-only access to clusters
Secrets masking for security (masks sensitive data in kubectl get secrets commands, does not affect logs)
OpenTelemetry Observability (opt-in)
- Distributed tracing for all tool calls
- Export to Jaeger, Tempo, Grafana, or any OTLP backend
- Configurable sampling strategies
- Rich span attributes (tool name, duration, K8s context, errors)
- See docs/OBSERVABILITY.md for details

Observability

The MCP Kubernetes server includes optional OpenTelemetry integration for comprehensive observability. This feature is disabled by default and can be enabled via environment variables or Helm configuration.

Quick Start

Enable observability with environment variables:

server.ts

export ENABLE_TELEMETRY=true
export OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317

npx mcp-server-kubernetes

What Gets Traced

All tool calls: kubectl_get, kubectl_apply, kubectl_logs, etc.
Execution duration: How long each operation takes
Success/failure status: Automatic error tracking
Kubernetes context: Namespace, context, resource type
Rich metadata: Host, process, and custom attributes

Backends Supported

Works with any OTLP-compatible backend:

Jaeger (open source)
Grafana Tempo (open source)
Grafana Cloud (commercial)
Datadog, New Relic, Honeycomb, Lightstep, AWS X-Ray

Configuration

See docs/OBSERVABILITY.md for comprehensive documentation including:

Configuration options
Deployment examples (Kubernetes, Helm, Claude Code)
Sampling strategies
Production best practices
Troubleshooting guide

Example with Jaeger

server.ts

# Start Jaeger
docker run -d --name jaeger \
  -e COLLECTOR_OTLP_ENABLED=true \
  -p 16686:16686 \
  -p 4317:4317 \
  jaegertracing/all-in-one:latest

# Enable telemetry
export ENABLE_TELEMETRY=true
export OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317
export OTEL_TRACES_SAMPLER=always_on

# Run server
npx mcp-server-kubernetes

# View traces: http://localhost:16686

Prompts

The MCP Kubernetes server includes specialized prompts to assist with common diagnostic operations.

/k8s-diagnose Prompt

This prompt provides a systematic troubleshooting flow for Kubernetes pods. It accepts a keyword to identify relevant pods and an optional namespace to narrow the search. The prompt's output will guide you through an autonomous troubleshooting flow, providing instructions for identifying issues, collecting evidence, and suggesting remediation steps.

Local Development

Make sure that you have bun installed. Clone the repo & install dependencies:

bash

git clone https://github.com/Flux159/mcp-server-kubernetes.git
cd mcp-server-kubernetes
bun install

Development Workflow

Start the server in development mode (watches for file changes):

bash

bun run dev

Run unit tests:

bash

bun run test

Build the project:

bash

bun run build

Local Testing with Inspector

Terminal

npx @modelcontextprotocol/inspector node dist/index.js
# Follow further instructions on terminal for Inspector link

Local testing with Claude Desktop

config.json

{
  "mcpServers": {
    "mcp-server-kubernetes": {
      "command": "node",
      "args": ["/path/to/your/mcp-server-kubernetes/dist/index.js"]
    }
  }
}

Local testing with mcp-chat

bash

bun run chat

Contributing

See the CONTRIBUTING.md file for details.

Advanced

Non-Destructive Mode

You can run the server in a non-destructive mode that disables all destructive operations (delete pods, delete deployments, delete namespaces, etc.):

shell

ALLOW_ONLY_NON_DESTRUCTIVE_TOOLS=true npx mcp-server-kubernetes

For Claude Desktop configuration with non-destructive mode:

config.json

{
  "mcpServers": {
    "kubernetes-readonly": {
      "command": "npx",
      "args": ["mcp-server-kubernetes"],
      "env": {
        "ALLOW_ONLY_NON_DESTRUCTIVE_TOOLS": "true"
      }
    }
  }
}

Commands Available in Non-Destructive Mode

All read-only and resource creation/update operations remain available:

Resource Information: kubectl_get, kubectl_describe, kubectl_logs, explain_resource, list_api_resources
Resource Creation/Modification: kubectl_apply, kubectl_create, kubectl_scale, kubectl_patch, kubectl_rollout
Helm Operations: install_helm_chart, upgrade_helm_chart, helm_template_apply, helm_template_uninstall
Connectivity: port_forward, stop_port_forward
Context Management: kubectl_context

Commands Disabled in Non-Destructive Mode

The following destructive operations are disabled:

kubectl_delete: Deleting any Kubernetes resources
uninstall_helm_chart: Uninstalling Helm charts
cleanup: Cleanup of managed resources
cleanup_pods: Cleaning up problematic pods
node_management: Node management operations (can drain nodes)
kubectl_generic: General kubectl command access (may include destructive operations)

For additional advanced features, see the ADVANCED_README.md and also the docs folder for specific information on helm_install, helm_template_apply, node management & pod cleanup.

Architecture

See this DeepWiki link for a more indepth architecture overview created by Devin.

This section describes the high-level architecture of the MCP Kubernetes server.

Request Flow

The sequence diagram below illustrates how requests flow through the system:

mermaid

sequenceDiagram
    participant Client
    participant Transport as Transport Layer
    participant Server as MCP Server
    participant Filter as Tool Filter
    participant Handler as Request Handler
    participant K8sManager as KubernetesManager
    participant K8s as Kubernetes API

    Note over Transport: StdioTransport or<br>SSE Transport

    Client->>Transport: Send Request
    Transport->>Server: Forward Request

    alt Tools Request
        Server->>Filter: Filter available tools
        Note over Filter: Remove destructive tools<br>if in non-destructive mode
        Filter->>Handler: Route to tools handler

        alt kubectl operations
            Handler->>K8sManager: Execute kubectl operation
            K8sManager->>K8s: Make API call
        else Helm operations
            Handler->>K8sManager: Execute Helm operation
            K8sManager->>K8s: Make API call
        else Port Forward operations
            Handler->>K8sManager: Set up port forwarding
            K8sManager->>K8s: Make API call
        end

        K8s-->>K8sManager: Return result
        K8sManager-->>Handler: Process response
        Handler-->>Server: Return tool result
    else Resource Request
        Server->>Handler: Route to resource handler
        Handler->>K8sManager: Get resource data
        K8sManager->>K8s: Query API
        K8s-->>K8sManager: Return data
        K8sManager-->>Handler: Format response
        Handler-->>Server: Return resource data
    end

    Server-->>Transport: Send Response
    Transport-->>Client: Return Final Response

See this DeepWiki link for a more indepth architecture overview created by Devin.

Publishing new release

Go to the releases page, click on "Draft New Release", click "Choose a tag" and create a new tag by typing out a new version number using "v{major}.{minor}.{patch}" semver format. Then, write a release title "Release v{major}.{minor}.{patch}" and description / changelog if necessary and click "Publish Release".

This will create a new tag which will trigger a new release build via the cd.yml workflow. Once successful, the new release will be published to npm. Note that there is no need to update the package.json version manually, as the workflow will automatically update the version number in the package.json file & push a commit to main.

Not planned

Adding clusters to kubectx.

Star History

🖊️ Cite

If you find this repo useful, please cite:

Code

@software{Patel_MCP_Server_Kubernetes_2024,
author = {Patel, Paras and Sonwalkar, Suyog},
month = jul,
title = {{MCP Server Kubernetes}},
url = {https://github.com/Flux159/mcp-server-kubernetes},
version = {2.5.0},
year = {2024}
}