I'm developing an application on Facebook, and I need to have the possibility to integrate my application on other sites (with connections to Facebook by the Facebook JavaScript API).
On Facebook, I can buy some things on an application using Facebook Credits, but on some other site, when I call the Facebook purchase dialog, I get this error:
API Error Code: 1151
API Error Description: Sorry, but this app may not be eligible to accept Facebook Credits.
If this app has accepted credits before, please try again.
Error Message: Invalid Application
Or is there a Facebook purchase dialog we can use only on Facebook?
This happens because the payment interface can only be called from an iframe application running on Facebook.
来源：https://stackoverflow.com/questions/7429519/facebook-credits-error-1151