# Frankfurter vs ExchangeRate-API (open access)

Page: https://free-web-services.com/compare/frankfurter-vs-exchangerate-api/

| | [Frankfurter](https://free-web-services.com/web-services/unit-convertors/frankfurter.md) | [ExchangeRate-API (open access)](https://free-web-services.com/web-services/unit-convertors/exchangerate-api-open-access.md) |
|---|---|---|
| Category | Currency and finance | Currency and finance |
| API key | Not needed | Not needed |
| Pricing | Free, no key needed and no usage limits. | Free, with attribution required; the keyed plans give more frequent updates, conversion endpoints and historical data. |
| From the browser | Yes (CORS) | Yes (CORS) |
| Formats | JSON | JSON |
| Interface | REST, HTTP-GET | REST, HTTP-GET |
| Provider | frankfurter.dev | exchangerate-api.com |
| Last checked | Working on October 31st, 2026 | Working on October 31st, 2026 |
| MCP server | No | No |

## Which one to choose

Both give exchange rates without a key. Frankfurter uses the European Central Bank's rates for about 30 major currencies, with history back to 1999 and no usage limits. ExchangeRate-API's open access endpoint covers more than 160 currencies, updated daily, asks for attribution and has no history. Choose Frankfurter for history and major currencies, ExchangeRate-API for many currencies.