patchBay

Account API vs IIN API

If you need a Finance API that's easy to integrate, go with IIN API.

Account API

This API is used for the classic integration. If you are just starting your implementation, refer to our [new integration guide](https://docs.adyen.com/marketplaces-and-platforms) instead. The Acc...

View docs
IIN API

IIN API allows you to accurately identify the issuing bank, card type, country of origin, and other details from a credit or debit card number. This is essential for fraud prevention, payment processing, and customer verification.

View docs

Account API

  • Simple API key authentication
  • HTTPS supported

IIN API

  • Simple API key authentication
  • HTTPS supported
  • CORS enabled for frontend use
FeatureAccount APIIIN API
AuthenticationapiKeyapiKey
HTTPSYesYes
CORSUnknownYes

When to use which?

IIN API works directly from the browser with CORS enabled, making it better for frontend-only apps.

View all Finance API comparisons