Accountants and freelancers who invoice abroad need the official rate for a specific date, not a rate a chatbot remembers. If you must convert at the ECB reference rate and show where the number came from, start here.
Without a tool, Claude may quote an old rate from memory. The Currency server uses European Central Bank daily reference rates: it converts on any date, converts into many currencies at once and gives rate history, with the rate date stated.
What you get
Convert an invoice for the books
Polish freelancer billing a German client
| Tool call | What it did |
|---|---|
| rate_on | Reads the ECB EUR/PLN rate for 2026-10-14 |
| convert | Converts EUR 4,200 at that rate |
The PLN amount with the rate and its date stated, so the bookkeeper can check it.
Free to start. Currency Pro is $19 once. Free vs Pro
Claude has no live data in a plain chat. It may give a rate from its training data that's months old, and it can't prove which date the rate is from.
Currency uses European Central Bank daily reference rates: it converts on a given date, converts one amount into many currencies, gives the rate for a pair on a date, and returns rate history for a window.
Example scenarios built on the real tools of Currency. Names and amounts are invented.
What was the ECB EUR to GBP rate on 30 September 2026, and what's EUR 5,750 in GBP at that rate?
The ECB reference rate for 30 September 2026 and the GBP amount, with the rate date stated so it can be cited on the invoice.
Convert EUR 4,200 to PLN at the ECB rate on the invoice date, 2026-10-14.
The PLN amount with the rate and its date stated, so the bookkeeper can check it.
About 5 min saved (estimate)
What's EUR 149 in GBP, USD, PLN and SEK today?
Four amounts, each rounded to its own minor units, all from the same ECB date.
About 5 min saved (estimate)
Every example here works on the free tier. One $39 key removes the limits on all of them. Pricing
Paste one URL into Claude.ai, Claude Desktop, Cursor or VS Code. No install, no account.
1. Get a free token (30 days, 600 calls an hour)
curl -s -X POST https://mcp.zovo.one/mcp/token
2. Paste this URL as a custom connector
https://mcp.zovo.one/mcp/currency/t/<token>
Or run it locally (Node.js 18+)
npx -y @theluckystrike/mcp-currency
| Free ($0, no key) | Pro ($19 once) |
|---|---|
| Latest rates and conversions, unlimited | History back to 1999-01-04 |
| All currencies the ECB quotes | Unlimited history windows |
| History and rate_on for the last 90 days | |
| Offline rate cache (local install) |
servers/currency/src/index.ts:17 (FREE_HISTORY_DAYS = 90), :135, :322
Line items with VAT, a validity date and a PDF, made from one prompt. Turn the accepted quote into an invoice. Uses the Quotes server. Free tier, Pro $19 once.
You get: Quote SpreadsheetOpen, query, edit and convert xlsx and csv files from Claude or Cursor. Formulas and sheets are kept. Uses the Spreadsheet server. Paste one URL, no install.
You get: Table from your file InvoiceType one sentence. Get a numbered PDF invoice with VAT and due date. Works in Claude and Cursor. Free tier, no key. Uses the Invoice server. 11 tools.
You get: PDF invoiceCurrency Pro: $19 once