kammaren (Baltsar/kammaren) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 4 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100

kammaren

Deterministic tax engine for Swedish AB. 258 verified test cases. AGPL-3.0.

→ Baltsar/kammaren· listed on github_repo_search

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

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Who stands behind it

Baltsar

Source: github_repo_search

Is this your MCP?

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Install from

GitHub

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
🚨
Known vulnerabilities in dependencies: 1 critical
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 3 credentials: ANTHROPIC_API_KEY, BERGET_API_KEY, TELEGRAM_BOT_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies1 critical

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

criticalvitest@1.6.1GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

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.
🔐 secretANTHROPIC_API_KEY
🔐 secretBERGET_API_KEY
configLLM_MODEL
configLLM_PROVIDER
🔐 secretTELEGRAM_BOT_TOKEN
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deploySUPABASE_SERVICE_ROLE_KEY
deploySUPABASE_URL
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

4/4 tools missing one or more hints — Arbetsgivaravgifter 2026 (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); Bolagsskatt 2026 (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); K10 Gränsbelopp 2026 (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +1 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

Only 0/4 tools referenced in tests (0%)

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

Dev dependencies

1 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

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 4 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 Score](https://m8ven.ai/badge/mcp/baltsar/kammaren)](https://m8ven.ai/mcp/baltsar/kammaren)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: e80702acb94cec8cc1d5b647a9db86d6f46576c4
code hash: b307f7d21557b8d7d9e78b9fdd8f2dca316cf23782e0ff24cc076779d286407f
view raw JSON →
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