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Obolus

by sanzation · remote · no sign-in to list tools · v1.0.4 · published by GitHub user sanzation

Read-only payroll calculations and multi-country tax comparisons for eight countries.

Final · 1
CompareRegistry entry

2 tools: 1 do something that can't be undone and 1 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http obolus https://www.obolusfinanz.de/api/mcp/public

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnberechne

    The server marks "berechne" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The input carries an amount (input.gross_salary.amount) and a currency, so it moves money.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Can't be undone 1Claude Code: ask
  • berechneCalculate detailed payroll and net salary for one country and person.1 finding

    Why it is in this group

    • The input carries an amount (input.gross_salary.amount) and a currency, so it moves money.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "berechne" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The input carries an amount (input.gross_salary.amount) and a currency, so it moves money.

      What this check looks for
    Description, as the server wrote it
    Calculate detailed payroll and net salary for one country and person. Use this for tax class, region, health insurance, pension, deductions, or other country-specific inputs. For the same gross salary across two or more countries, use taxcompare. Use semantic fields where available; legacy fields remain REST compatibility inputs. Monetary fields in the legacy request are minor units and period-specific.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
Only reads 1Claude Code: allow
  • taxcompareCompare annual gross, net pay, taxes, and employee social contributions across two or more supported countries.No findings

    Why it is in this group

    • The description's first verb is "compare": a word for reading.
    Description, as the server wrote it
    Compare annual gross, net pay, taxes, and employee social contributions across two or more supported countries. Use shared_gross for the same offer and local_median_gross for country-market benchmarks. Provide tax_year and at least two countries. Use berechne for detailed single-country payroll.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • 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.

Install

Pinned to version 1.0.4. Values in angle brackets are yours to fill in.

claude mcp add --transport http obolus https://www.obolusfinanz.de/api/mcp/public

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__obolus__taxcompare"
    ],
    "ask": [
      "mcp__obolus__berechne"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as obolus. Review it before you use it.