Applications are registered entities within Mercado Pago that act as a unique identifier for managing the authentication and authorization of your integrations. In other words, they serve as the link between your development and Mercado Pago, and they constitute the first stage in carrying out the integration.

With them, you can access the necessary credentialsUnique access keys used to identify an integration in your account, linked to your application. For more information, access the link below.Credentials to interact with our APIs or specific services, as well as manage and organize your integration, which is why you must create an application for each Mercado Pago solution you integrate.

To create an application, follow the steps below.

1. In the upper right corner of Mercado Pago Developers, click on Login and enter the required information with the data for your Mercado Pago account.
2. Once you are logged in, in the upper right corner of Mercado Pago Developers, click on Create application if your account does not yet have any created applications, or go to "Your integrations" and select View all. There, click on Create application.
3. Once inside Your integrations, click on the Create application button.

4. Enter a name to identify your application. The limit is up to 50 alphanumeric characters.
5. Select Online payments as the type of payment you want to integrate, as this is the solution type corresponding to online stores. Click Continue.
6. Select that you are integrating for a self-developed store. Optionally, you can enter your store's URL. Click Continue.
7. Select the Checkouts option and then choose Checkout Pro as the solution you are going to integrate.
8. Confirm the selected options. If you need to modify any selection, click the Edit button. Accept the Privacy Statement and the Terms and Conditions and click on Confirm.

In Your integration, you will be able to view the list of all your created applications and access the Integration data for each of them.

After creating your application, the test credentialsUnique access keys that we use to identify an integration in your account, linked to your application. For more information, see the link below.Credentials will also be automatically created. Use the test credentials to perform all necessary configurations and validations in a secure test environment.

When accessing test credentials, the following credential pairs will be displayed: Public KeyPublic key used in the frontend to access information and encrypt data. You can access it through Your integrations > Integration data > Tests > Test credentials. and the Access TokenPrivate key of the application created in Mercado Pago, that must be used in the backend. You can access it through Your integrations > Integration data > Tests > Test credentials..