Kastell (kastelldev/kastell) is an MCP server listed on the M8ven Trust Index. It scores 89 out of 100, grade B. It declares 17 tools. No publisher has claimed this listing.

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B
Caution
89/100
1 month ago

Kastell

Server security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode.

→ kastelldev/kastell· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

kastelldev

Source: Glama

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// key findings
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// known CVEs in dependencies1 high1 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

highjs-yaml@4.2.0GHSA-52cp-r559-cp3m

js-yaml: YAML merge-key chains can force quadratic CPU consumption

lowesbuild@0.28.0GHSA-g7r4-m6w7-qqqr

esbuild allows arbitrary file read when running the development server on Windows

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configKASTELL_ALLOW_PRIVATE_IPS
configKASTELL_CALLER
configKASTELL_SAFE_MODEenvironment variable controls destructive operations:
// quality suggestions

Tool test coverage

Only 1/17 tools referenced in tests (6%)

Write tests that reference each tool by name so every tool has at least one test.

Shell command execution

2 child_process calls — runs shell commands

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Production dependencies are patched

0 critical, 1 high severity in production deps — js-yaml@4.2.0 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/kastelldev/kastell?variant=verified)](https://m8ven.ai/mcp/kastelldev/kastell)
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commit: 2d77c613f4b6f0223e980a9c1dcfbe67fa309bba
code hash: a306a3bdbcb0d3bc16d1ea11ab34f769fc7023fa2790aa5088e9e89448f9bdcc
verified: 8/6/2026, 5:32:41 AM
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