问题
I have tried to used postman for Express Checkout, but getting following error:
ACK=Failure&L_ERRORCODE0=81002&L_SHORTMESSAGE0=Unspecified%20Method&L_LONGMESSAGE0=Method%20Specified%20is%20not%20Supported&L_SEVERITYCODE0=Error
I read also few other answers but havent found out any solution.
回答1:
You are inputting all the parameter and value under Headers.
You should put all the parameters/values under Params, located at the right side the URL endpoint field.
See below:
来源：https://stackoverflow.com/questions/34185415/express-checkout-paypal-failure