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FX Converter MCP

by Lulu-The-Narwhal · remote · no sign-in to list tools · v0.1.0 · published by GitHub user Lulu-The-Narwhal

Free, keyless real-time currency conversion and exchange rates for any currency pair.

Changes · 1
CompareRegistry entry

2 tools: 1 change things 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 fx-converter https://ads.getlulu.dev/fx/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnconvert_currency

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

    Matched text

    annotations: {"readOnlyHint":true}; The name "convert_currency" says "convert": 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.

2 tools

Changes things 1Claude Code: ask
  • convert_currencyConvert an amount from one currency to another using real, current ECB reference exchange rates.1 finding

    Why it is in this group

    • The name "convert_currency" says "convert": 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 "convert_currency" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true}; The name "convert_currency" says "convert": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Convert an amount from one currency to another using real, current ECB reference exchange rates. Use for any "how much is X in Y" question -- "convert 100 USD to EUR", "what's 50 GBP in yen". `from_currency`/`to_currency` are 3-letter ISO codes (USD, EUR, GBP, JPY, ...). Returns the converted amount, the rate used, and the date the rate is from.

    Annotations the server declares

    • readOnlyHint: true
Only reads 1Claude Code: allow
  • get_exchange_rateLook up today's exchange rate between two currencies, without converting a specific amount.No findings

    Why it is in this group

    • The name "get_exchange_rate" says "get": a word for reading.
    Description, as the server wrote it
    Look up today's exchange rate between two currencies, without converting a specific amount. Use for "what's the exchange rate between USD and EUR" style questions. `from_currency`/`to_currency` are 3-letter ISO codes. Returns the rate and the date it's from.

    Annotations the server declares

    • readOnlyHint: true

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

claude mcp add --transport http fx-converter https://ads.getlulu.dev/fx/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__fx-converter__get_exchange_rate"
    ],
    "ask": [
      "mcp__fx-converter__convert_currency"
    ],
    "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 fx-converter. Review it before you use it.