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MonsiTools Calculators

by monsitools.com · remote · no sign-in to list tools · v1.0.1 · published by com.monsitools

Find and run exact business, finance and SaaS calculators instead of guessing the math.

Changes · 1
CompareRegistry entry

3 tools: 1 change things and 2 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 calculators https://monsitools.com/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncalculate

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

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "run": a word for a change.

    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.

3 tools

Changes things 1Claude Code: ask
  • calculateRuns a MonsiTools calculator on the given inputs and returns the result.1 finding

    Why it is in this group

    • The description's first verb is "run": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

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

      Matched text

      annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "run": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Runs a MonsiTools calculator on the given inputs and returns the result. Works without a key for 10 calculations a day per IP address. A MonsiTools Premium API key, sent as 'Authorization: Bearer mt_live_...' when connecting, removes the daily limit.

    Annotations the server declares

    • title: Run a calculator
    • readOnlyHint: true
    • openWorldHint: false
Only reads 2Claude Code: allow
  • describe_calculatorReturns a calculator's name, category, formula, input names and page URL, given its slug.No findings

    Why it is in this group

    • The name "describe_calculator" says "describe": a word for reading.
    Description, as the server wrote it
    Returns a calculator's name, category, formula, input names and page URL, given its slug.

    Annotations the server declares

    • title: Describe a calculator
    • readOnlyHint: true
    • openWorldHint: false
  • search_calculatorsFind MonsiTools calculators by keyword (for example 'runway', 'break even', 'roas', 'loan payment').No findings

    Why it is in this group

    • The name "search_calculators" says "search": a word for reading.
    Description, as the server wrote it
    Find MonsiTools calculators by keyword (for example 'runway', 'break even', 'roas', 'loan payment'). Returns each match's slug, name, category and input names. Use describe_calculator for details, then calculate to run one.

    Annotations the server declares

    • title: Search MonsiTools calculators
    • readOnlyHint: 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.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http calculators https://monsitools.com/mcp

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__calculators__search_calculators",
      "mcp__calculators__describe_calculator"
    ],
    "ask": [
      "mcp__calculators__calculate"
    ],
    "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 calculators. Review it before you use it.