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Rancher MCP Server

by LokiMCPUniverse
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Python
Remote

Rancher MCP Server

A Model Context Protocol (MCP) server that exposes the Rancher Manager v2.x API to LLM clients. Built on the official mcp Python SDK (FastMCP) with async HTTP via httpx and settings management via pydantic-settings.

Features

  • Bearer-token authentication using a Rancher API key (token-xxx:yyy...).

  • Cluster, project, and node discovery against the /v3 management API.

  • Kubernetes resource queries (namespaces, pods, deployments, pod logs) through Rancher's /k8s/clusters/{cluster_id} proxy.

  • Deployment scaling via strategic-merge PATCH on the /scale subresource.

  • Catalog app listing and on-demand kubeconfig generation.

Related MCP server: MCP Server Sample

Requirements

  • Python 3.10+

  • A Rancher Manager instance reachable over HTTPS.

  • An API token generated from the Rancher UI (Account -> API & Keys). The token must be passed in the full token-xxx:yyy... form.

Installation

pip install -e ".[dev]"

Configuration

Configure the server through environment variables (prefix RANCHER_) or a .env file in the working directory:

Variable

Description

Default

RANCHER_BASE_URL

Rancher Manager base URL (no trailing slash).

https://localhost

RANCHER_API_TOKEN

API token in token-xxx:yyy... format.

(required)

RANCHER_VERIFY_SSL

Verify TLS certificates.

true

RANCHER_TIMEOUT

HTTP timeout in seconds.

60

Running

rancher-mcp

The server speaks MCP over stdio and can be wired into any MCP-capable client (Claude Desktop, Cursor, custom agents, and so on).

Tools

Tool

Description

list_clusters

List all managed clusters.

get_cluster

Fetch one cluster by ID.

list_projects

List projects, optionally scoped to a cluster.

list_nodes

List nodes in a cluster.

list_namespaces

List Kubernetes namespaces via the Rancher proxy.

list_pods

List pods (optionally namespace-scoped).

list_deployments

List Deployments (optionally namespace-scoped).

get_pod_logs

Tail pod logs.

scale_deployment

Scale a Deployment via the /scale subresource.

list_catalog_apps

List catalog apps installed in a cluster.

create_kubeconfig

Generate a kubeconfig for a cluster.

Development

python3 -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
pytest -x --tb=short
ruff check src tests

License

MIT License - see LICENSE file for details.

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