How many API keys does each account have by default?

Each Stripe account has four API keys by default. This includes two publishable keys and two secret keys. The publishable keys are used in client-side code to facilitate direct integration with Stripe’s services without exposing sensitive information. The secret keys, on the other hand, are meant to be kept confidential and are used on the server side for making requests to Stripe's API, handling sensitive operations such as creating charges or managing customer data.

Having two of each type allows developers to create a clear separation between testing and production environments. For instance, one set of keys can be designated for testing purposes, while the other is reserved for live transactions, thereby enhancing security and reducing the risk of accidental charges or modifications in the live environment.