Codes are everywhere in the world of payments. But what do they all mean? If you struggle to tell your HTTP status codes from your ISO 4217s, we've got your back.
See a list of each country's dialing code, and 2- and 3-character ISO 3166 country codes.
Merchant category codes
See the ISO 18245 merchant category codes that are used to classify your business.
Learn more about the response codes you may receive informing you about the status of a request performed with the API.
Payout response codes
Learn about different response codes you can receive if your payout request is successful.
Learn more about the recommendation codes you may receive, which provide you with additional information about how and when you should retry a transaction.
Visa response codes categories
Learn more about the response codes Visa returns to inform you if and when a transaction should be retried.
See the definition of the various codes returned with address verification service (AVS) checks.
CVV response codes
Learn more about the card verification value (CVV) response codes you may receive when you carry out a CVV check or verify a card.
See the definitions of the various chargeback codes you may receive during the chargeback process.
See the definitions of the error codes you may receive if there is an issue with your API request.
See the definitions of the various fraud codes you may receive when processing Visa and Mastercard cards.
Calculating the amount
Learn how to calculate the amount value to supply in your API requests, based on the currency.