Spreedly's docs do not mention anything. Edit: They do indeed. I plead illiteracy.
Paypal's docs say the card type is "MasterCard", but actually trying to authorize with that will get you a "Card type is invalid." response from Paypal.
What is the magic string you need to successfully charge a MasterCard? Examples I have tried which did not work are:
After some trial and error, I found out that the correct answer is "Master".
This cost me some money, so I thought I would do some constructive venting by leaving some help for the next developer who wondered.
In case others come here looking for the other card type strings, here they all are:
List of supported cards and their identifiers https://docs.spreedly.com/reference/supported-cards/. List of credit card numbers to use https://docs.spreedly.com/reference/test-data/.
