How do I install Kubernetes?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Kubernetes need an API key?

No required environment variable is listed on this record.

What transport does Kubernetes use?

Kubernetes runs locally over stdio.

When was Kubernetes last checked?

Last checked 2026-10-28. MCP server for managing Kubernetes clusters and Helm releases

MCP-сервер Kubernetes

Kubernetes & Helm MCP Server

A Model Context Protocol (MCP) server for managing Kubernetes clusters and Helm releases through any MCP-compatible client. Built in Go for low resource overhead, it supports read-only operation by default in Kubernetes, in-cluster or kubeconfig-based authentication, explicit capability gates for dangerous tools, HTTP bearer-token auth, and an autonomous AI-driven DevOps agent via opencode integration.

Features
Architecture
Quick Start
Configuration
Operational Safety Model
DevOps Agent
Agent Skills
Tool Reference
Deployment
Security
Development
License

Features

Kubernetes Operations — read, write, and explicitly gated dangerous tools covering the full lifecycle of cluster resources:

Category	Capabilities
Discovery & Inspection	List API resources, get/describe/export resources as JSON or YAML, diff resource states, trace ownership chains
Monitoring	Cluster health checks, top pods/nodes by CPU or memory, resource quotas, limit ranges
Debugging	Pod debug info (conditions + events + logs), service endpoint health, network policy analysis, security context inspection, resource event history
Mutations	Create/update resources from JSON or YAML, delete resources, scale workloads, rollout restarts, manifest dry-run validation, optional exec/kubectl
DevOps Agent	Autonomous AI agent that inspects and, when explicitly permitted, manages cluster workloads using MCP tools, powered by any OpenAI-compatible LLM
Navigation	List namespaces, list available kubeconfig contexts, rollout status

Helm Operations — 9 tools for chart lifecycle management:

Category	Capabilities
Read	List releases, get release details, release history, list repositories
Write	Install, upgrade, uninstall, rollback releases, add repositories

Platform — Flexible resource identifier resolution accepts PascalCase Kind (Deployment), lowercase plural (deployments), singular (deployment), or short names (deploy).

Architecture

src/
├── main.go              # Server entry point, tool registration, transport setup
├── tools/
│   ├── k8s.go           # Kubernetes MCP tool definitions (schemas)
│   ├── helm.go          # Helm MCP tool definitions (schemas)
│   └── agent.go         # DevOps agent tool definition
├── handlers/
│   ├── k8s.go           # Kubernetes tool handlers (request → response)
│   ├── helm.go          # Helm tool handlers (request → response)
│   └── agent.go         # DevOps agent handler
└── pkg/
    ├── k8s/
    │   └── client.go    # Kubernetes client (dynamic, discovery, metrics, typed)
    ├── helm/
    │   └── client.go    # Helm client (install, upgrade, release management)
    └── agent/
        └── agent.go     # OpenCode agent orchestration (subprocess, config, parsing)

The server uses a dynamic Kubernetes client with a cached GVR (GroupVersionResource) resolver backed by the discovery API, so it works with any resource type — including CRDs — without hardcoded mappings.

Quick Start

Prerequisites

Go 1.24+ (for building from source)
Access to a Kubernetes cluster with a valid kubeconfig
metrics-server installed for CPU/memory metrics tools

Build from Source

cd src
go mod download
CGO_ENABLED=0 go build -ldflags="-w -s" -o k8s-mcp-server main.go

Run Locally

# SSE transport (default)
./k8s-mcp-server

# Streamable HTTP transport — endpoint: http://localhost:8080/mcp
./k8s-mcp-server --mode streamable-http

# Stdio transport (for CLI/editor integrations)
./k8s-mcp-server --mode stdio

# Read-only mode (disables all write operations)
./k8s-mcp-server --read-only

# Disable Helm tools
./k8s-mcp-server --no-helm

# Combine flags
./k8s-mcp-server --mode sse --port 9090 --read-only --no-helm

Docker

# Build
docker compose build

# Run with local kubeconfig in safe read-only HTTP mode
export MCP_AUTH_TOKEN="$(openssl rand -hex 32)"
docker run -p 8080:8080 \
  -e SERVER_MODE=streamable-http \
  -e SERVER_READ_ONLY=true \
  -e MCP_REQUIRE_AUTH=true \
  -e MCP_AUTH_TOKEN="$MCP_AUTH_TOKEN" \
  -e KUBECONFIG=/home/appuser/.kube/config \
  -v ~/.kube/config:/home/appuser/.kube/config:ro \
  k8s-mcp-server:latest

Docker Compose

services:
  k8s-mcp-server:
    build: ./src
    ports:
      - "8080:8080"
    volumes:
      - ~/.kube:/home/appuser/.kube:ro
    environment:
      KUBECONFIG: /home/appuser/.kube/config
      SERVER_MODE: streamable-http
      SERVER_PORT: "8080"
      SERVER_READ_ONLY: "true"
      MCP_REQUIRE_AUTH: "true"
      MCP_AUTH_TOKEN: ${MCP_AUTH_TOKEN:?set MCP_AUTH_TOKEN before starting}
    restart: unless-stopped

Configuration

Command-Line Flags

Flag	Environment Variable	Default	Description
`--mode`	`SERVER_MODE`	`sse`	Transport: `stdio`, `sse`, or `streamable-http`
`--port`	`SERVER_PORT`	`8080`	HTTP listen port (SSE and streamable-http modes)
`--read-only`	`SERVER_READ_ONLY`	`false`	Disable all write operations
`--no-k8s`	—	`false`	Disable all Kubernetes tools
`--no-helm`	—	`false`	Disable all Helm tools
`--no-agent`	—	`false`	Disable the DevOps agent tool
`--enable-exec`	`MCP_ENABLE_EXEC`	`false`	Expose the dangerous `execInPod` capability when not read-only
`--enable-kubectl`	`MCP_ENABLE_KUBECTL`	`false`	Expose the dangerous `runKubectlCommand` capability when not read-only
`--enable-agent-write`	`MCP_ENABLE_AGENT_WRITE`	`false`	Allow `devopsAgent` to run write-capable child MCP sessions when not read-only

--no-k8s and --no-helm cannot be used together.

HTTP Authentication

For HTTP transports, set MCP_AUTH_TOKEN to require Authorization: Bearer <token> or X-MCP-Token: <token> on MCP requests. /healthz remains unauthenticated for Kubernetes probes.

Set MCP_REQUIRE_AUTH=true to fail startup when an HTTP transport is selected without MCP_AUTH_TOKEN. The default Kubernetes manifest uses this mode.

DevOps Agent Environment Variables

These are optional. When all three are set, the devopsAgent tool is registered. In --read-only server mode, or when MCP_ENABLE_AGENT_WRITE is not enabled, the agent is still available but is forced into inspection-only mode.

Variable	Description	Example
`OPENCODE_BASE_URL`	OpenAI-compatible API base URL	`http://llm.local:8080/v1`
`OPENCODE_API_KEY`	API key for the LLM provider	`sk-...`
`OPENCODE_MODEL`	Model ID in `provider/model` format	`private-llm/llama-3.1-70b`

Kubeconfig Resolution Order

Explicit path via KUBECONFIG environment variable
In-cluster ServiceAccount config (when running inside Kubernetes)
~/.kube/config fallback

Health Check

All HTTP modes expose GET /healthz which verifies connectivity to the Kubernetes API server. Returns 200 ok or 503 unhealthy: <error>.

Operational Safety Model

This server is treated as an agent-facing platform component. The hardening work makes the operational contract explicit: default deployments are read-only, HTTP access can require authentication, dangerous capabilities are opt-in, outputs are sanitized, and side effects are auditable.

Safe Defaults

The Kubernetes deployment uses in-cluster ServiceAccount credentials instead of a mounted kubeconfig.
The default manifest sets SERVER_READ_ONLY=true, so write tools and Helm mutations are not registered.
The default manifest sets MCP_REQUIRE_AUTH=true and reads MCP_AUTH_TOKEN from the k8s-mcp-auth Secret.
/healthz remains unauthenticated for probes; MCP HTTP traffic requires Authorization: Bearer <token> or X-MCP-Token: <token> when MCP_AUTH_TOKEN is set.

Capability Gates

Normal write tools require non-read-only mode.
execInPod additionally requires MCP_ENABLE_EXEC=true or --enable-exec.
runKubectlCommand additionally requires MCP_ENABLE_KUBECTL=true or --enable-kubectl.
devopsAgent is inspection-only unless the parent server is write-enabled and MCP_ENABLE_AGENT_WRITE=true.
Child opencode MCP sessions inherit MCP_ENABLE_EXEC and MCP_ENABLE_KUBECTL from the parent environment when those gates are set.
switchContext is not registered because process-global kubeconfig context switching is unsafe for concurrent HTTP MCP usage.

Audit Logging

Every registered tool goes through the audited registration wrapper in main.go. Tool calls log the tool name, capability class, status, duration, and error text when present. This gives operators a stable trail for read, write, destructive, exec, kubectl, log-reading, validation, Helm, and agent activity.

Output Safety

JSON tool responses pass through the shared sanitizer before returning to clients.
Pod logs, resource YAML, Helm release output, GPU/operator logs, kubectl output, and agent output are redacted for secret-like values.
Kubernetes Secret data and stringData values are redacted, including short base64 values.
Sensitive key names such as passwords, tokens, authorization headers, certificates, and private keys are redacted recursively in structured output.
Large responses are truncated before they are returned to the agent.

Idempotent Apply Behavior

createResource and createResourceYAML use Kubernetes server-side apply with field manager k8s-mcp-server.
createResourceYAML can infer kind from the manifest when the caller omits it.
Apply handlers validate apiVersion, kind, and metadata name before submitting side effects.
Dynamic Kubernetes list calls use paginated API reads to avoid oversized list responses.

Timeouts and Bounded Operations

HTTP transports set read-header, read, idle, and graceful shutdown timeouts.
Helm Kubernetes REST clients default to a 30-second timeout when no timeout is already configured.
runKubectlCommand and devopsAgent use explicit per-call execution timeouts.

Build Reproducibility

The release Docker image bakes a curated DevOps-engineer skill set under src/skills/ into /home/appuser/.config/opencode/skills/. The set is scoped to Kubernetes monitoring/remediation, shell scripting, and Python/Rust code work; see Agent Skills for the full list.
src/.dockerignore excludes build output, embedded .git, and .DS_Store. The src/skills/ tree is intentionally not excluded so that the audited skill set ships with the image.
Per-user or experimental skills can still be supplied without rebuilding by volume-mounting over /home/appuser/.config/opencode/skills/ at runtime.

Review Artifacts

The structured review deliverables live under docs/review/:

executive-summary.md — readiness assessment and remaining risks.
risk-register.csv — decision-ready findings with severity, evidence, owner, effort, and status.
architecture-themes.md — cross-cutting design themes and platform standards.
remediation-roadmap.md — immediate, near-term, and strategic work.
release-readiness-checklist.md — verification gates before broader reliance.

DevOps Agent

The devopsAgent tool launches an autonomous AI agent for Kubernetes cluster management. It uses opencode to run a headless agentic loop. By default the agent is inspection-only. If the parent server is not read-only and MCP_ENABLE_AGENT_WRITE=true is set, the agent can use write-capable k8s and Helm MCP tools to manage workloads autonomously, producing a structured report of actions taken and results.

How It Works

You call devopsAgent with a natural language description of the task
The server spawns opencode run as a headless subprocess
OpenCode connects to a child k8s-mcp-server (stdio, --no-agent) for cluster access
The agent autonomously calls MCP tools to accomplish the task
Returns a structured report: objective, actions taken, current state, issues found, next steps

Prerequisites

opencode CLI installed (included in Docker image)
An OpenAI-compatible LLM endpoint accessible from the server
Environment variables set: OPENCODE_BASE_URL, OPENCODE_API_KEY, OPENCODE_MODEL

Kubernetes Deployment

Create a Secret with your LLM provider credentials:

kubectl -n k8s-mcp-server create secret generic k8s-mcp-agent-config \
  --from-literal=base-url="http://llm.local:8080/v1" \
  --from-literal=api-key="sk-your-api-key" \
  --from-literal=model="private-llm/llama-3.1-70b" \
  --dry-run=client -o yaml | kubectl apply -f -

The deployment manifest references this Secret with optional: true, so the server works fine without it — the devopsAgent tool simply won't be registered.

Docker Compose

Set the env vars in your shell before running, or add them to a .env file:

export OPENCODE_BASE_URL="http://llm.local:8080/v1"
export OPENCODE_API_KEY="sk-your-api-key"
export OPENCODE_MODEL="private-llm/llama-3.1-70b"
docker compose up

Tool Parameters

Parameter	Required	Default	Description
`prompt`	Yes	—	Natural language description of the task to perform
`namespace`	No	—	Namespace to focus the investigation on
`model`	No	env var	Override `OPENCODE_MODEL` for this run
`timeout`	No	`300`	Max execution time in seconds (max: 900)
`readOnly`	No	`false`	When true, restricts the agent to read-only inspection. Forced to true when the parent server runs with `--read-only` or `MCP_ENABLE_AGENT_WRITE` is not enabled

Agent Skills

OpenCode skills are reusable instruction sets that extend the agent's behavior for specific domains — e.g., how to triage GPU workloads, how to interpret your team's alerting conventions, or domain-specific runbooks.

Bundled Skill Set

The Docker image ships with a curated set of skills scoped to a DevOps-engineer workload: Kubernetes cluster monitoring and remediation, shell scripting, Python/Rust code work, and the NVIDIA NIM/RAG stack this server is typically deployed alongside. The bundled set covers:

Core DevOps / SRE — devops-engineer, kubernetes-specialist, sre-engineer, monitoring-expert, chaos-engineer, terraform-engineer, mcp-developer
Languages — python-pro, rust-engineer, golang-pro
Debugging / quality — debugging-wizard, code-reviewer, code-documenter, test-master, cli-developer, the-fool
Security — secure-code-guardian, security-best-practices, security-reviewer, security-threat-model
Data / RAG — database-optimizer, postgres-pro, sql-pro, pandas-pro, ml-pipeline, rag-architect, jupyter-notebook, prompt-engineer
NVIDIA stack — nat-* (NeMo Agent Toolkit: agent configuration, evaluation, installation, MCP+serving, optimization, path-checks, telemetry, tools/functions, user-rules, workflow-creation), nvcf-ngc-cli-skill, nvcf-self-managed-cli, nvcf-self-managed-installation, nv-html
Workflow / meta — gh-address-comments, gh-fix-ci, define-goal, skill-creator, skill-evolution

The runtime image installs the toolchain those skills assume — git, github-cli, python3, py3-yaml, and jq — alongside the existing helm, kubectl, bash, and curl. Skill helper scripts (e.g., skill-creator/scripts/quick_validate.py, gh-fix-ci/scripts/inspect_pr_checks.py) run directly in the container without extra setup.

Adding Skills

Each skill lives in its own subdirectory under src/skills/ and requires a SKILL.md file with YAML frontmatter:

src/skills/
└── my-skill/
    └── SKILL.md

src/skills/my-skill/SKILL.md:

---
name: my-skill
description: Brief description of what this skill teaches the agent
---

Your skill instructions here. Describe domain knowledge, investigation strategies,
or specialized runbooks that the agent should follow when relevant.

Frontmatter fields:

Field	Required	Description
`name`	Yes	Lowercase letters/numbers/hyphens only; must match directory name
`description`	Yes	1–1024 character description used by the agent to select the skill
`license`	No	Licensing information
`metadata`	No	Custom string key-value pairs

The name must match its parent directory name exactly and follow the pattern ^[a-z0-9]+(-[a-z0-9]+)*$.

How Skills Are Loaded

Docker / Kubernetes: The standard image bakes the curated skill set under src/skills/ into /home/appuser/.config/opencode/skills/ during build. The set is audited, scoped to the DevOps-engineer role, and ships with the runtime tools each skill assumes (see Bundled Skill Set). To replace or extend the baked set without rebuilding, mount over the same container path at runtime.

Runtime mount (no rebuild required): Override or supplement the bundled skills by volume-mounting on top of the container path:

# docker-compose.yaml
volumes:
  - ./my-skills:/home/appuser/.config/opencode/skills:ro

Local development (without Docker): Place skills in the global opencode config directory:

~/.config/opencode/skills/<name>/SKILL.md

Tool Reference

Kubernetes — Read-Only Tools (31)

Discovery & Core

Tool	Description	Key Parameters
`getAPIResources`	List all available API resource types in the cluster	`includeNamespaceScoped`, `includeClusterScoped`
`listResources`	List resources of a specific type, optionally filtered	`kind`*, `namespace`, `labelSelector`, `fieldSelector`
`getResource`	Get full JSON of a single resource	`kind`, `name`, `namespace`
`describeResource`	Human-friendly description with events and owner refs	`kind`, `name`, `namespace`
`getResourceYAML`	Export resource as clean YAML	`kind`, `name`, `namespace`
`getResourceDiff`	Compare current state with previous or another resource	`kind`, `name`, `namespace`, `compareWith`
`getNamespaceResources`	List all resources in a namespace	`namespace`*, `types`, `includeSecrets`
`getResourceOwners`	Trace ownership chain (e.g., Pod → ReplicaSet → Deployment)	`kind`, `name`, `namespace`, `includeChildren`
`getIngresses`	Find ingresses matching a hostname	`host`*
`listNamespaces`	List all namespaces with status and labels	`labelSelector`
`listContexts`	List available kubeconfig contexts	—

Monitoring & Observability

Tool	Description	Key Parameters
`getClusterHealth`	Cluster health report (nodes, control plane, events)	`includeMetrics`, `includeEvents`
`getClusterSummary`	Concise cluster status overview	`includeNamespaceDetails`
`getTopPods`	Top pods by CPU or memory usage	`namespace`, `sortBy`, `limit`
`getTopNodes`	Top nodes by resource utilization	`sortBy`, `includeConditions`
`getNodeMetrics`	CPU/memory metrics for a specific node	`name`*
`getPodMetrics`	CPU/memory metrics for a specific pod	`namespace`, `podName`
`getResourceQuotas`	Resource quotas and usage	`namespace`, `showPercentage`
`getLimitRanges`	Limit ranges in namespaces	`namespace`
`getEvents`	Cluster events, optionally filtered	`namespace`, `labelSelector`
`getRolloutStatus`	Rollout status for Deployment/StatefulSet/DaemonSet	`kind`, `name`, `namespace`*

Debugging & Troubleshooting

Tool	Description	Key Parameters
`getPodsLogs`	Pod logs (single or all containers)	`name`, `namespace`, `containerName`
`getPodDebugInfo`	Comprehensive pod debug (conditions, events, logs)	`name`, `namespace`, `includeLogs`, `logLines`
`getServiceEndpoints`	Service endpoints with pod health status	`name`, `namespace`, `checkHealth`
`getNetworkPolicies`	Network policies affecting a namespace or pod	`namespace`*, `podName`, `includeDetails`
`getSecurityContext`	Pod and container security contexts	`name`, `namespace`, `includeDefaults`
`getResourceHistory`	Recent events and changes for a resource	`kind`, `name`, `namespace`, `hours`
`validateManifest`	Dry-run validation of YAML/JSON manifests	`manifest`*, `format`, `strict`

GPU Debugging

Tool	Description	Key Parameters
`getGPUClusterOverview`	Cluster-wide GPU resource and workload overview	`includeNonGPUNodes`, `includeEvents`
`diagnoseGPUScheduling`	Diagnose GPU scheduling for a specific pod	`podName`, `namespace`
`getGPUOperatorHealth`	NVIDIA operator and device plugin health check	`devicePluginNamespace`, `gpuOperatorNamespace`

Kubernetes — Write Tools

Disabled when --read-only is set. execInPod and runKubectlCommand also require explicit dangerous capability gates.

Tool	Description	Key Parameters
`createResource`	Create/update resource from JSON manifest	`kind`, `manifest`, `namespace`
`createResourceYAML`	Create/update resource from YAML manifest	`yamlManifest`*, `kind`, `namespace`
`deleteResource`	Delete a resource by kind and name	`kind`, `name`, `namespace`
`rolloutRestart`	Rolling restart of a workload	`kind`, `name`, `namespace`*
`scaleResource`	Scale a workload's replica count	`kind`, `name`, `namespace`, `replicas`
`remediateGPUIssue`	Apply GPU remediation actions	`action`*, `nodeName`, `taintKey`
`execInPod`	Execute a command in a pod container. Requires `MCP_ENABLE_EXEC=true`.	`name`, `namespace`, `command`*, `container`
`runKubectlCommand`	Execute a direct kubectl command. Requires `kubectl` in PATH and `MCP_ENABLE_KUBECTL=true`.	`command`*, `timeout`

switchContext is intentionally not registered. Process-global context switching is unsafe for concurrent HTTP MCP usage; run separate server instances or use a request/session-scoped multi-cluster model instead.

Agent Tool

Tool	Description	Key Parameters
`devopsAgent`	Autonomous opencode-powered DevOps agent. Forced read-only when the parent server is read-only.	`prompt`*, `namespace`, `model`, `timeout`, `readOnly`

Helm — Read-Only Tools (4)

Tool	Description	Key Parameters
`helmList`	List Helm releases	`namespace`*
`helmGet`	Get release details (chart, values, manifest)	`releaseName`, `namespace`
`helmHistory`	Release revision history	`releaseName`, `namespace`
`helmRepoList`	List configured chart repositories	—

Helm — Write Tools (5)

Disabled when --read-only is set.

Tool	Description	Key Parameters
`helmInstall`	Install a Helm chart	`releaseName`, `chartName`, `namespace`, `repoURL`, `values`
`helmUpgrade`	Upgrade an existing release	`releaseName`, `chartName`, `namespace`, `repoURL`, `values`
`helmUninstall`	Uninstall a release	`releaseName`, `namespace`
`helmRollback`	Rollback to a previous revision	`releaseName`, `namespace`, `revision`*
`helmRepoAdd`	Add a chart repository	`repoName`, `repoURL`

* = required parameter

Resource Identifier Flexibility

The kind parameter across all tools accepts multiple formats. All of these resolve to the same resource:

Format	Example
PascalCase Kind	`Deployment`
Lowercase plural	`deployments`
Lowercase singular	`deployment`
Short name	`deploy`

This works for any resource type, including CRDs.

Deployment

Kubernetes In-Cluster

The included manifest at deploy/k8s-mcp-server.yaml provides a safe-by-default in-cluster deployment. It uses the pod ServiceAccount for Kubernetes access, runs in read-only mode, and requires an MCP bearer token for HTTP MCP requests.

# Create the namespace first so the auth secret can be created.
kubectl create namespace k8s-mcp-server --dry-run=client -o yaml | kubectl apply -f -

# Create the HTTP MCP auth token secret.
kubectl -n k8s-mcp-server create secret generic k8s-mcp-auth \
  --from-literal=token="$(openssl rand -hex 32)" \
  --dry-run=client -o yaml | kubectl apply -f -

# Apply RBAC, DaemonSet, NetworkPolicy, and Service.
kubectl apply -f deploy/k8s-mcp-server.yaml

The manifest includes:

Dedicated k8s-mcp-server namespace
ServiceAccount with a read-only ClusterRole covering all standard API groups
DaemonSet with liveness/readiness probes on /healthz
SERVER_READ_ONLY=true and MCP_REQUIRE_AUTH=true
Hardened security context (non-root, read-only root filesystem, all capabilities dropped)
Resource requests/limits (4–8 CPU, 4Gi–16Gi memory)
ClusterIP Service on port 8080

Automated Rebuild & Deploy

./deploy.sh

This script builds the Docker image, pushes it, applies the Kubernetes manifests, syncs the MCP auth secret from MCP_AUTH_TOKEN, and triggers a rolling restart.

MCP Client Configuration

For MCP clients that connect via streamable HTTP (e.g., in-cluster agents):

http://k8s-mcp-server.k8s-mcp-server.svc.cluster.local:8080/mcp

Include the auth token as Authorization: Bearer <token> or X-MCP-Token: <token> for HTTP transports.

Cursor / VS Code

Add to your editor's MCP settings (settings.json):

{
  "mcp.mcpServers": {
    "k8s-mcp-server": {
      "command": "k8s-mcp-server",
      "args": ["--mode", "stdio"],
      "env": {
        "KUBECONFIG": "${env:HOME}/.kube/config"
      }
    }
  }
}

For read-only mode, add "--read-only" to the args array.

Security

Container Hardening

The Docker image runs with a minimal attack surface:

Non-root user (appuser, UID 1001)
Read-only root filesystem
All capabilities dropped
Minimal base image — Alpine 3.21 with helm v3.17.3 (SHA256-pinned), kubectl v1.34.1 (SHA256-pinned), the opencode/Bun runtime, and the DevOps-skill toolchain (git, github-cli, python3, py3-yaml, jq, bash, curl)
No privilege escalation allowed

Read-Only Mode

Use --read-only or SERVER_READ_ONLY=true to prevent cluster state changes through this server. This disables Kubernetes and Helm write tools and forces devopsAgent into inspection-only mode. execInPod and runKubectlCommand are additionally disabled unless their explicit capability gates are enabled.

The default Kubernetes manifest sets SERVER_READ_ONLY=true and uses read-only ServiceAccount RBAC.

RBAC

The included ClusterRole (k8s-mcp-server-readonly) grants read access to standard Kubernetes API groups:

Core — pods, services, configmaps, secrets, namespaces, nodes, events, endpoints, PVs, PVCs, resource quotas, limit ranges, service accounts
apps — deployments, replicasets, statefulsets, daemonsets
batch — jobs, cronjobs
networking.k8s.io — ingresses, network policies, ingress classes
storage.k8s.io — storage classes, volume attachments
rbac.authorization.k8s.io — roles, rolebindings, clusterroles, clusterrolebindings
autoscaling — horizontal pod autoscalers
policy — pod disruption budgets
metrics.k8s.io — pod and node metrics

For write operations, create a separate ClusterRole with the necessary verbs and bind it to the ServiceAccount.

Development

Project Structure

├── .github/workflows/       # CI pipeline (build, test, vet, lint)
├── deploy/                  # Kubernetes deployment manifests
├── docs/review/             # Review findings, roadmap, and release gates
├── scripts/                 # Git hooks
├── src/
│   ├── main.go              # Entry point, tool registration
│   ├── Dockerfile           # Multi-stage build
│   ├── .dockerignore        # Reproducible Docker build exclusions
│   ├── .golangci.yml        # Linter configuration
│   ├── tools/               # MCP tool schema definitions
│   ├── handlers/            # Tool request handlers
│   └── pkg/                 # Client libraries (k8s, helm, agent)
├── docker-compose.yaml      # Local development
├── Makefile                 # Build, test, lint, format, deploy
├── deploy.sh                # Build + deploy script
└── redeploy.sh              # Backward-compatible wrapper for deploy.sh

Makefile Targets

Target	Description
`make build`	Build the binary
`make test`	Run all unit tests
`make vet`	Run `go vet` static analysis
`make fmt`	Auto-format all Go source files with `gofmt`
`make fmt-check`	Check formatting without modifying (used in CI)
`make lint`	Run `golangci-lint` (skips if not installed)
`make check`	Run all checks: format, vet, test, build
`make docker`	Build the Docker image
`make deploy`	Full rebuild + deploy via `deploy.sh`
`make clean`	Remove build artifacts
`make hooks`	Install the git pre-commit hook

Getting Started

# Install the pre-commit hook (runs fmt-check, vet, and tests before each commit)
make hooks

# Run the full check suite locally (same checks as CI)
make check

Verification

The hardening pass was verified with:

make test
make check
docker compose config
kubectl apply --dry-run=client -f deploy/k8s-mcp-server.yaml
docker compose build

Test coverage was added for auth environment parsing, HTTP auth decisions, recursive output sanitization, safe handler marshaling, and agent capability-gate propagation.

Adding a New Tool

Define the schema in tools/k8s.go (or tools/helm.go):

func MyNewTool() mcp.Tool {
    return mcp.NewTool("myNewTool",
        mcp.WithDescription("What this tool does"),
        mcp.WithString("param", mcp.Required(), mcp.Description("...")),
    )
}

Implement the client method in pkg/k8s/client.go (or pkg/helm/client.go)
Create the handler in handlers/k8s.go (or handlers/helm.go)
Register in main.go through the audited wrapper:

addAuditedTool(s, tools.MyNewTool(), "read", handlers.MyNewHandler(client))

Use the correct capability string for the tool, such as read, read/logs, write, write/destructive, exec, kubectl, or agent. Kubernetes handlers that return cluster data should use the existing marshalSafe path or k8s.SanitizeText so large responses and secrets are handled consistently.

Key Dependencies

Package	Version	Purpose
`github.com/mark3labs/mcp-go`	v0.41.1	MCP protocol implementation
`helm.sh/helm/v3`	v3.19.0	Helm client library
`k8s.io/client-go`	v0.34.1	Kubernetes client
`k8s.io/metrics`	v0.34.1	Metrics API client

License

This project is licensed under the MIT License. See the LICENSE file for details.

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Server facts

Tools

Questions

How do I install Kubernetes?

Does Kubernetes need an API key?

What transport does Kubernetes use?

When was Kubernetes last checked?

Documentation

Kubernetes & Helm MCP Server

Table of Contents

Features

Architecture

Quick Start

Prerequisites

Build from Source

Run Locally

Docker

Docker Compose

Configuration

Command-Line Flags

HTTP Authentication

DevOps Agent Environment Variables

Kubeconfig Resolution Order

Health Check

Operational Safety Model

Safe Defaults

Capability Gates

Audit Logging

Output Safety

Idempotent Apply Behavior

Timeouts and Bounded Operations

Build Reproducibility

Review Artifacts

DevOps Agent

How It Works

Prerequisites

Kubernetes Deployment

Docker Compose

Tool Parameters

Agent Skills

Bundled Skill Set

Adding Skills

How Skills Are Loaded

Tool Reference

Kubernetes — Read-Only Tools (31)

Discovery & Core

Monitoring & Observability

Debugging & Troubleshooting

GPU Debugging

Kubernetes — Write Tools

Agent Tool

Helm — Read-Only Tools (4)

Helm — Write Tools (5)

Resource Identifier Flexibility

Deployment

Kubernetes In-Cluster

Automated Rebuild & Deploy

MCP Client Configuration

Cursor / VS Code

Security

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Read-Only Mode

RBAC

Development

Project Structure

Makefile Targets

Getting Started

Verification

Adding a New Tool

Key Dependencies

License