Several open-source and web-based options are available for testing:
When a payment gateway fails, developers use checkers to rule out API key issues . sk live checker
At its core, an is a validator for Stripe secret keys . Stripe uses two main types of secret keys: sk_test: Used for development and "sandbox" testing. sk_live: Used for processing real customer payments. Several open-source and web-based options are available for
A popular testing environment for Stripe configurations. Security Warning sk live checker
with untrusted third-party websites. A secret key provides full access to your Stripe account, including the ability to issue refunds or move funds. It is always safer to use the Official Stripe Dashboard or an open-source script you can run locally. API keys - Stripe Documentation