Best Exchange Rate API for Europe in 2026: 8 Compared for EUR Rates, ECB Reference Rates and VAT

For a European business the euro reference rate from the European Central Bank is the default answer to every currency question, and several free APIs serve it. The choice gets harder when you also need a live rate for checkout, a non-euro official rate for a subsidiary in Poland or Switzerland, or output your accounting system can import.

This comparison looks at eight exchange rate APIs from the point of view of a team in Europe. Free-tier limits and prices were read from each provider's own pricing page on 10 November 2026; they change often, so confirm before you commit.

What a team in Europe needs from an exchange rate API

• Live EUR pairs for pricing and checkout, not just a daily fixing.
• ECB euro foreign exchange reference rates, the rate EU VAT rules allow for invoices in other currencies.
• Other European central banks: Switzerland, Poland, Czechia, Sweden, Norway, Denmark, Hungary and the UK each publish their own table.
• History by date, for the date VAT became chargeable.
• Monthly averages, which Germany uses for VAT returns.

Quick comparison

The European rates and what they are for

• ECB euro reference rates. Published for 29 currencies, usually updated at around 16:00 CET every working day, from a concertation at about 14:10 CET. The ECB publishes them for information purposes only.
• VAT Directive, Article 91(2). The exchange rate is the latest selling rate recorded on the most representative exchange market of the Member State when VAT becomes chargeable. Member States shall accept instead the latest exchange rate published by the European Central Bank at that time.
• Germany. For VAT returns, section 16(6) of the German VAT Act requires conversion at the monthly average rates announced by the Federal Ministry of Finance, which are monthly averages of the ECB reference rates.
• Outside the euro area. Each national central bank publishes its own table, and local rules usually name it. A group with entities in several countries needs each bank's table, not a euro cross rate.

The point for choosing an API: a market mid-rate and an official table are different products. A market rate is right for showing a customer a price. It is not the figure a tax form or an auditor asks for.

The eight providers

1. AllRatesToday

Best for: teams that need both kinds of rate. Mid-market rates for 160+ currencies refresh every 60 seconds on every plan, on any base currency, over HTTPS. The same key serves the official tables of 123 central banks and 6 tax authorities, each with the publisher's own date. For Europe that means: ECB reference rates, plus the other European central banks and the Swiss customs table. Output is JSON, CSV, XML or Excel from the same endpoints, with SDKs for JavaScript, Python, PHP, Go and Rust and an MCP server for AI agents. Paid plans start at €4.99 a month; dated tables and history are on paid plans.

2. Frankfurter

Best for: projects that only need official fixings and want them free. Frankfurter is open source, needs no key and has no monthly cap. It now aggregates 111 central banks and official sources. For Europe its source list covers: ECB and other European central banks. It serves official fixings, not a live market rate, and it is a free service with no paid tier or support contract.

3. ExchangeRate-API

Best for: dashboards and reports that need volume and can live with one update a day. The free plan gives 1,500 requests a month with daily updates; the Pro plan is $10 a month for 30,000 requests with hourly updates. Rates are a blended market figure, not a named institution's table.

4. Open Exchange Rates

Best for: teams that want a long-established vendor and work from a US dollar base. The free plan gives 1,000 requests a month with hourly updates on a USD base; other base currencies start with the $12 a month plan.

5. CurrencyAPI

Best for: small private projects. The free plan gives 300 requests a month with daily updates and is for private use only; paid plans start at $12.99 a month.

6. Fixer

Best for: teams already on the apilayer marketplace. The free plan gives 100 calls a month with hourly updates for non-commercial use, and base-currency switching is listed only on paid plans, which start at $14.99 a month.

7. currencylayer

Best for: the same apilayer stack with a dollar source. The free plan gives 100 calls a month with daily updates for non-commercial use; paid plans start at $14.99 a month.

8. XE Currency Data

Best for: banks and large companies that need a recognised vendor on an annual contract. There is a trial but no free plan; the entry plan is $599 a year for 10,000 requests a month with daily rates.

Try it for EUR

# live mid-market rate
curl "https://allratestoday.com/api/v1/rates?source=EUR&target=USD" \
  -H "Authorization: Bearer YOUR_API_KEY"

# ECB reference rates, latest table
curl "https://allratestoday.com/api/open/central-bank/ecb"

# the ECB rate on the date VAT became chargeable
curl "https://allratestoday.com/api/v1/central-bank/ecb/2026-10-15" \
  -H "Authorization: Bearer YOUR_API_KEY"

The first call needs a free API key. The official table responses carry the table's own date, so you can show which publication a figure came from.

Which one should you pick?

FAQ

What is the best exchange rate API for Europe in 2026?

For live EUR rates plus ECB and other European central bank tables on one key, AllRatesToday. For the ECB fixing free and without a key, Frankfurter. For the largest free quota of daily market rates, ExchangeRate-API.

Can I use the ECB rate for VAT invoices?

Article 91(2) of the EU VAT Directive says Member States shall accept the latest exchange rate published by the European Central Bank at the time the tax becomes chargeable, as an alternative to the latest selling rate on the most representative exchange market.

When are ECB reference rates published?

Usually at around 16:00 CET every working day, based on a concertation between central banks at about 14:10 CET.

Is there a free ECB exchange rate API?

Yes. Frankfurter serves ECB reference rates free without a key, and the ECB offers its own data portal. AllRatesToday serves the same table with live market rates alongside.