# Postman Collection
source: https://developer.mastercard.com/pay-with-rewards/documentation/postman-collections/index.md

## Overview {#overview}

Postman is an application for easy RESTful API exploration. You can use Postman to test API calls multiple times without having to write code. You can save multiple sets of credentials to quickly test an API's calls in the sandbox and production environments.

### 👉Prerequisites {#prerequisites}

1. [Postman account](https://www.postman.com/) (Sign up or Log in),
2. Mastercard Developer project with sandbox and production credentials.

### 👉Tutorial {#tutorial}

See the following [Postman tutorial](https://developer.mastercard.com/platform/tutorial/use-postman-for-mastercard-apis/) for the generic steps needed to get Mastercard authentication working with the Postman collection.