kubernetes-mcp

Kubernetes MCP

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A Kubernetes-focused Model Context Protocol (MCP) server built in Go. It exposes Kubernetes operations as MCP tools and supports stdio, sse, and streamable transports.

Why This Project

• Unified MCP interface for Kubernetes operations
• Works with both local kubeconfig and in-cluster configuration
• Multiple transports for different integration modes
• Generic resource CRUD + utility tools + prompts + metrics
• slog-based logging with configurable level/format

Requirements

• Go 1.24+
• Access to a Kubernetes cluster
  • via --kubeconfig, or
  • via in-cluster service account

Quick Start

Build

git clone https://github.com/HSn0918/kubernetes-mcp.git
cd kubernetes-mcp
go build -o kubernetes-mcp ./cmd/kubernetes-mcp

Run (stdio)

./kubernetes-mcp server transport stdio --kubeconfig ~/.kube/config

Run (SSE)

./kubernetes-mcp server transport sse \
  --port 8080 \
  --health-port 8081 \
  --allow-origins "*" \
  --base-url "http://localhost:8080" \
  --kubeconfig ~/.kube/config

Run (StreamableHTTP)

./kubernetes-mcp server transport streamable \
  --port 8080 \
  --health-port 8081 \
  --allow-origins "*" \
  --kubeconfig ~/.kube/config

CLI Structure

kubernetes-mcp
├── server
│   └── transport
│       ├── stdio
│       ├── sse
│       └── streamable
└── version

Configuration Flags

Global flags:

• --log-level (debug|info|warn|error, default info)
• --log-format (console|json, default console)
• --kubeconfig (optional)

Network transport flags (sse, streamable):

• --port (default 8080)
• --health-port (default 8081)
• --allow-origins (default *)

SSE-only flags:

• --base-url (default http://localhost:<port>)

Transport Endpoints

• StreamableHTTP MCP endpoint: POST /mcp
• Health endpoints (SSE/Streamable only):
  • GET /healthz
  • GET /readyz

Tooling Overview

1. Generic Resource Operations

For each API group prefix, the server exposes:

• LIST_<PREFIX>_RESOURCES
• GET_<PREFIX>_RESOURCE
• DESCRIBE_<PREFIX>_RESOURCE
• CREATE_<PREFIX>_RESOURCE
• UPDATE_<PREFIX>_RESOURCE
• DELETE_<PREFIX>_RESOURCE

Registered prefixes:

• K8S

2. Core/Cluster Utilities

• LIST_NAMESPACES
• LIST_NODES
• GET_POD_LOGS
• ANALYZE_POD_LOGS

3. Utility Tools

• GET_CURRENT_TIME
• GET_CLUSTER_INFO
• GET_API_RESOURCES
• SEARCH_RESOURCES
• EXPLAIN_RESOURCE
• APPLY_MANIFEST
• VALIDATE_MANIFEST
• DIFF_MANIFEST
• GET_EVENTS

4. Prompt Tools

• KUBERNETES_YAML_PROMPT
• KUBERNETES_QUERY_PROMPT
• TROUBLESHOOT_PODS_PROMPT
• TROUBLESHOOT_NODES_PROMPT
• TROUBLESHOOT_NETWORK_PROMPT

5. Metrics Tools

• GET_NODE_METRICS
• GET_POD_METRICS
• GET_RESOURCE_METRICS
• GET_TOP_CONSUMERS

Architecture (k8s-style group/version)

cmd/kubernetes-mcp/
  main.go
  app/
pkg/
  client/kubernetes/
  config/
  handlers/
    apis/
      core/v1/
      apps/v1/
    base/
    tool/
    prompt/
    metrics/
  server/
  health/
  logger/

Docker

Build:

docker build -t kubernetes-mcp:latest .

Run with explicit transport command:

docker run --rm -it \
  -v ~/.kube:/root/.kube \
  kubernetes-mcp:latest \
  server transport stdio --kubeconfig /root/.kube/config

Kubernetes Deployment

Deployment manifests are in /deploy/kubernetes.

make k8s-deploy
# or
make k8s-deploy-kustomize

Development

make build
make test

Justfile + One-Click Skill Install

This repo includes a project usage skill at skills/kubernetes-mcp-usage.

# list just tasks
just

# common dev tasks
just build
just test

# install the project skill into Codex
just skill-install

# overwrite existing install
just skill-install-force

Skill install destination: $CODEX_HOME/skills/kubernetes-mcp-usage (or ~/.codex/skills/kubernetes-mcp-usage when CODEX_HOME is not set).

After installing, restart Codex to pick up the skill.

Notes

• Resource operations depend on your cluster API availability and RBAC permissions.
• For network transports behind ingress/reverse proxy, set --base-url correctly for SSE.