Well… yes, of course those things are copyrighted. I'm a bit surprised you didn't foresee that issue. But still, it sounds like you learned a lot about Stripe

Well… yes, of course those things are copyrighted. I'm a bit surprised you didn't foresee that issue. But still, it sounds like you learned a lot about Stripe and that other API. Those are good skills to have. If nothing else you've padded your resume quite strongly, so the project wasn't entirely for nothing.