Klarion MCP Server

Install · Use it · Results · How it works · Reference

People who need security tools inside Claude, Cursor, VS Code, or another MCP client. The project is written in Go.

VERIFIED ACTIVE

LAST COMMIT 2026-09-21 · ★ 3 · #196 OF 216 MAINTAINED SECURITY · VERIFIED 2026-09-30

MIT · Go servers · how we verify → /methodology

01 · Install Klarion

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Desktop

Settings → Extensions → Install, then select the https://github.com/0x1Adi/Klarion/releases/download/v0.4.3/klarion-mcp-v0.4.3.mcpb .mcpb bundle

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as Claude Desktop extension (.mcpb bundle)

repo age created 2026-08-06 - young repo, little track record yet

license MIT - declared in the repository

registry namespace io.github.0x1Adi is GitHub-verified and matches the repo owner

03 · What Klarion can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.4.3 · 2026-09-20

bump to v0.4.3 (@0x1Adi)

v0.4.2 · 2026-09-20

hosted judge waitlist (@0x1Adi) · publish a Homebrew cask, bump to v0.4.2 (@0x1Adi)

v0.4.1 · 2026-09-19

Release v0.4.1 (@0x1Adi)

04 · Who maintains Klarion

Klarion is maintained by 0x1adi. It's the only MCP server we track from this author; the repo dates to Aug 2026.

05 · Facts

repository
github.com/0x1adi/klarion
category
security - ranked #196 of 216 actively-maintained security servers as of 2026-09-30.
release cadence
10+ releases in the last 90 days (latest 2026-09-20)
registry
io.github.0x1Adi/klarion (active, first published 2026-09-18 · 3 versions)
packages
mcpb:https://github.com/0x1Adi/Klarion/releases/download/v0.4.3/klarion-mcp-v0.4.3.mcpb

06 · Klarion FAQ

What is Klarion?

Install · Use it · Results · How it works · Reference

Is Klarion still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-21 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

07 · Alternatives to Klarion

Alternatives to Klarion

Maintained security servers if Klarion isn't the fit.

  1. OpenWork MCP Gateway Your OpenWork org's skills, plugins, workflows, and connections through one OAuth MCP URL. ★ 23,783 · 2026-09-29
  2. Treg To OpenRouter for tools and data. Compare catalog providers and call them from one hosted MCP endpoint. ★ 3,881 · 2026-09-30
  3. SafeDep Vet MCP Protect your AI agents and IDEs from malicious open-source packages. ★ 1,109 · 2026-09-23
  4. HOL Guard Local-first AI agent security evidence and approval workflows through HOL Guard's stdio MCP server. ★ 680 · 2026-09-30
  5. SonarQube MCP Server Analyze code quality and security with SonarQube Server or Cloud directly in AI assistants. ★ 655 · 2026-09-29
  6. Decionis CommerceGate MCP Commerce preflights, D365 authorization, signed evidence, and reports; no marketplace or ERP writes. ★ 589 · 2026-09-28

Pairs well with

Servers that cover what Klarion doesn't - only shown when the pairing reason fits the companion.

  1. Xcode Build MCP → developer tools companion developer tools · ★ 6,443
  2. Sentry MCP → developer tools companion developer tools · ★ 871
  3. World Monitor → DevOps & monitoring companion DevOps & monitoring · ★ 87,544
  4. Langfuse MCP → DevOps & monitoring companion DevOps & monitoring · ★ 108

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