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

## Overview {#overview}

Insomnia is an application for easy RESTful API exploration. You can use Insomnia 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. [Insomnia account](https://insomnia.rest/) (Sign up or Log in),
2. Mastercard Developer project with sandbox and production credentials.

### 👉Tutorial {#tutorial}

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

Download our Insomnia Collection here:
[Insomnia_collection_2025.json](https://static.developer.mastercard.com/content/pay-with-rewards/uploads/Insomnia_collection_2025.json) (13KB)