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Living in the Netherlands

nl.nltaxcalculator/living-nlnltaxcalculator.nlstreamable-httpv0.1.0Scanned

Living in NL: legal max rent (points), car by plate (RDW), city budget, current fees with sources.

4 tools: 4 change things.

Tools: 0 delete, 0 irreversible, 4 write, 0 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • 1 finding

Anlyon alternative

4 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

4 tools

Changes things 4Claude Code: ask
  • car_by_plateLooks up a Dutch-registered car by its number plate (kenteken) in the official RDW register: make, model, first registration, fuel, CO2 emission, catalogue price, empty weight, whe…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Looks up a Dutch-registered car by its number plate (kenteken) in the official RDW register: make, model, first registration, fuel, CO2 emission, catalogue price, empty weight, when the periodic inspection (APK) is due and whether it is insured. With a taxable income it also gives the company car tax (bijtelling) for 2026, including the electric-car rate locked for 60 months from first registration. Live data from RDW Open Data.

    Annotations the server declares

    • title: Dutch car lookup by number plate (RDW)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • monthly_budget_by_cityWhat is left each month in a Dutch city: net salary (2026 tax, optional 30% ruling and holiday allowance) minus a typical unregulated-sector rent for the home size in that city, th…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    What is left each month in a Dutch city: net salary (2026 tax, optional 30% ruling and holiday allowance) minus a typical unregulated-sector rent for the home size in that city, the basic health insurance premium (less any healthcare allowance), an average energy bill and the municipal charges for a renter. Cities with their own figures: Amsterdam, Amstelveen, Haarlem, The Hague, Rotterdam, Utrecht, Eindhoven, Helmond, Leeuwarden, Zwolle; any other city uses the national average rent and leaves out municipal charges. Food, transport, internet and water board charges are not included.

    Annotations the server declares

    • title: Monthly budget in a Dutch city: net pay minus rent and fixed costs
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • nl_current_factsCurrent Dutch amounts that change every year, each with the period it applies to and its official source, so an answer does not rely on outdated knowledge.1 finding

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The description names a tool "dutch_tax_figures" that this server does not list.

      Matched text

      description: "...income tax figures use the tax server's dutch_tax_figures tool."

      What this check looks for
    Description, as the server wrote it
    Current Dutch amounts that change every year, each with the period it applies to and its official source, so an answer does not rely on outdated knowledge. Topics: health_deductible (Healthcare deductible (eigen risico)), child_benefit (Child benefit (kinderbijslag)), passport_id_fees (Passport and identity card fees), ind_fees (IND application fees (residence permits and naturalisation)), rent_limits (Rent limits and maximum rent increases), minimum_wage (Minimum wage (wettelijk minimumloon)). Ask by topic, or with a short question. For income tax figures use the tax server's dutch_tax_figures tool.

    Annotations the server declares

    • title: Current Dutch figures with their source (2026)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • rent_points_checkFor a rented independent home (zelfstandige woning: own front door, kitchen and toilet) in the Netherlands: from its points under the points system (woningwaarderingsstelsel, WWS),…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    For a rented independent home (zelfstandige woning: own front door, kitchen and toilet) in the Netherlands: from its points under the points system (woningwaarderingsstelsel, WWS), the rental sector (social up to 143 points, regulated mid-rent up to 186, free sector above), the legal maximum basic monthly rent (kale huur) for 2026, whether a current rent is above it, and the maximum yearly rent increase for that sector. The points come from the government's Huurprijscheck on huurcommissie.nl. Rooms (onzelfstandige woonruimte) use a different table and are not covered.

    Annotations the server declares

    • title: Dutch rent points check: legal maximum rent and allowed increase
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnnl_current_facts

    The description names a tool "dutch_tax_figures" that this server does not list.

    Matched text

    description: "...income tax figures use the tax server's dutch_tax_figures tool."

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http living-nl https://nltaxcalculator.nl/dutch-tax/api/living/mcp
claude mcp add --transport http living-nl https://nltaxcalculator.nl/dutch-tax/api/living/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__living-nl__car_by_plate",
      "mcp__living-nl__monthly_budget_by_city",
      "mcp__living-nl__nl_current_facts",
      "mcp__living-nl__rent_points_check"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as living-nl. Review it before you use it.

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/nl.nltaxcalculator/living-nl/verify?hash=88d7060c4fbed9c086ed1b2e7aef34ded2cd26cb94927156cf540e61eb6f5ebb" | jq -e '.changed == false'

Pinned hash 88d7060c4fbe, from Oct 31, 2026, 07:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/nl.nltaxcalculator/living-nl/changes.xml

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anlyon.dev badge for nl.nltaxcalculator/living-nl
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Source: MCP Registry. Synced Oct 31, 2026, 07:17 UTC.