What is the card_type for MasterCard when using Spreedly with Paypal?

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." resp开发者_如何学Pythononse from Paypal.

What is the magic string you need to successfully charge a MasterCard? Examples I have tried which did not work are:

• MASTERCARD
• MC
• mastercard
• MasterCard
• mc

In case others come here looking for the other card type strings, here they all are:

• MasterCard: master
• Visa: visa
• American Express: american_express
• Discover: discover

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.

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/.