If you have a process that requires you to use a card number, such as an e-commerce checkout or an account signup, you may encounter problems in getting one that is valid and works.
How does it work? A customer enters their personal information, such as their name, address, and other details into your website or application. Some companies use fake payment details as part of this process to test if users submit accurate information.
This API will provide you with fake credit card details for you to use on your test environments.
You can check Fake Credit Card Generator API for free here.