# Insomnia Collection
source: https://developer.mastercard.com/consumer-credit-analytics/documentation/developer-tools/insomnia-collection/index.md

## Insomnia collection {#insomnia-collection}

[Insomnia](https://insomnia.rest/) in a new tab is an open-source API client that developers use to quickly and easily send HTTP requests to Mastercard APIs. API Consultancy and Standards developed an Insomnia Plugin in a new tab for handling API authentication. For the full step-by-step guide, open the [Insomnia Collection guide](https://developer.mastercard.com/platform/documentation/developer-tools/insomnia-collection/).

Get the Consumer Credit Analytics API Insomnia collection here: \[consumer-credit-analytics-collection.json\]
[consumer-credit-analytics-api-collection.yaml](https://static.developer.mastercard.com/content/consumer-credit-analytics/swagger/consumer-credit-analytics-api-collection.yaml) (9KB)

## Overview {#overview}

The Insomnia guide covers how to set up Mastercard API requests in Insomnia, including plugin installation, workspace import options, environment configuration, and request execution.

## Prerequisites {#prerequisites}

* Access to a Mastercard Developers project with the credentials required by the API you are testing
* Insomnia installed on your machine
* The correct authentication and encryption details for the service you want to call

## What You Will Find {#what-you-will-find}

* Plugin installation options for Insomnia
* Import guidance for collections and workspace templates
* Environment setup for OAuth 1.0a flow
* Practical steps for sending and validating requests in Sandbox and Production