Longhorn MCP server

by rafaelgaspar·io.github.rafaelgaspar/longhorn-mcp·v0.1.8

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MCP server for the Longhorn distributed storage manager API, with a --read-only mode.

A92/100grade A

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Safety scan

A92/100

full report

Adoption

Growing

0 stars242 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Longhorn tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-10-16 · same rubric, same numbers if you re-run it

no findings

Code scan24 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitylocal package, no credentials required12/15
Maintenancelast push 1 days ago15/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Longhorn compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 92/100; higher than 93% of 48,243 servers
Downloads a week: 242; more than 78% of 12,306 servers with a package

Release history: 2 versions in the registry since 2026-09-04, latest 2026-10-08, typically one every 34 days.

Install Longhorn in Claude Code, Cursor or VS Code

Runs npx -y longhorn-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add longhorn-mcp -- npx -y longhorn-mcp

Add to Cursor

What the publisher says

From the Longhorn repository's README, as published. We do not edit it. Read it on GitHub

longhorn-mcp

An MCP server for the Longhorn distributed storage manager API. Full read/write coverage of Longhorn's REST API (volumes, snapshots, backups, backing images, nodes, settings, engine images, recurring jobs, and more), a --read-only mode, both stdio and Streamable HTTP transports, and an official Helm chart.

AI-assisted development. The majority of this codebase — implementation, tests, and this documentation — was written with AI assistance (Claude). Review accordingly, especially before running write-mode tools against a production Longhorn cluster.

Quick start

npx -y longhorn-mcp --longhorn-url=http://<longhorn-manager-host>:9500

Longhorn's manager API is unauthenticated — reachability is the only access control. If you're not running this against an in-cluster Longhorn (see Connecting popular MCP clients → Remote/HTTP), you'll need a VPN, SSH tunnel, or kubectl port-forward svc/longhorn-backend 9500:9500 to reach it safely. Never expose Longhorn's manager API directly to an untrusted network.

CLI reference

Deploying with Helm

An official chart is published alongside every release:

helm install longhorn-mcp oci://ghcr.io/rafaelgaspar/longhorn-mcp/charts/longhorn-mcp --version 0.1.0 \
  --set args[0]=--http \
  --set args[1]=--longhorn-url=http://longhorn-backend.longhorn-system.svc.cluster.local:9500

Key values:

Full schema: chart/values.yaml / chart/values.schema.json.

The chart is also attached as an OCI referrer directly on the image manifest, for tooling that discovers charts via the OCI Referrers API instead of pulling a separately tagged artifact:

oras discover ghcr.io/rafaelgaspar/longhorn-mcp:0.1.0

Connecting popular MCP clients

Each client's exact config file path/key can drift between versions — check the client's own docs if these don't work. All of them accept the same underlying command/args shape for a local stdio server.

Claude Code

claude mcp add longhorn -- npx -y longhorn-mcp --longhorn-url=http://localhost:9500

Claude Desktop

Edit claudedesktopconfig.json:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Longhorn: common questions

Is Longhorn MCP server safe?: Yes, by our scan: it is graded A (92/100). Read the Longhorn safety report
How do I install Longhorn?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Longhorn need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Longhorn maintained?: The last commit was 20 days ago (2026-10-16). The latest release is v0.1.8.
How does Longhorn compare with other MCP servers?: safety score 92/100 (higher than 93% of 48,243 servers); downloads a week 242 (more than 78% of 12,306 servers with a package). Full comparison.