Information has been added about values that are not valid for the configuration of the back_urls value, such as 'localhost/' or '127.0.0.1' with or without a specified port. We recommend using a server with a named domain (DNS) or development IPs to be able to return to the site after payment. Otherwise, the "Something went wrong" message will appear at the end of the checkout process.

If you were using the old Mercado Pago app ("Mercado Pago") and stopped receiving payments in your store, don't worry.

To start selling again, install our new app ("Checkout Mercado Pago") by following this documentation.

In addition to offering support for PHP v8.2 or higher and Mercado Pago's most used public APIs, the new version of the SDK also enables the implementation of customizable HTTPS clients.

The new version ensures support for Typescript and Vanilla Javascript, types for all requests and responses, and implementation examples for all clients.