# Using the Postman Collection
source: https://developer.mastercard.com/open-finance-us/documentation/integration-and-testing/postman-collection/index.md

The Mastercard Open Finance Postman collection provides a quick and convenient way to explore and test the Open Finance APIs. You can use it to try out API calls, inspect responses, and generate code snippets for your application.
View on GitHub

## Prerequisites {#prerequisites}

Before using the Postman collection, you should:

1. [Generate your credentials](https://developer.mastercard.com/open-finance-us/documentation/quick-start-guide/index.md#generate-your-credentials) (Partner ID, Partner Secret, and App Key)
2. [Create a test customer](https://developer.mastercard.com/open-finance-us/documentation/quick-start-guide/index.md#welcome-your-first-customer)

## Getting Started {#getting-started}

1. Click Run in Postman
2. Fork the collection so that you can try it online (you can also choose to import a copy of the collection if you have the Postman client application set up already).
3. Select the *Test Drive* environment (top right) and update the `partnerId`, `partnerSecret`, `appKey` and `customerId` variables.
4. Click **Send** on individual requests, or **Run collection**
5. Explore the **Pre-request Script* and *Tests** tabs, and update the collection as you wish
6. Generate [code snippets](https://learning.postman.com/docs/sending-requests/generate-code-snippets/) you can use in your application

![Postman workspace](https://static.developer.mastercard.com/content/open-finance-us/uploads/postman-request.png)

## See Also {#see-also}

* [Quick Start Guide](https://developer.mastercard.com/open-finance-us/documentation/quick-start-guide/index.md)
* [Generating an API Client Library](https://developer.mastercard.com/open-finance-us/documentation/integration-and-testing/generating-an-api-client-library/index.md)
* [Test Profiles](https://developer.mastercard.com/open-finance-us/documentation/integration-and-testing/test-the-apis/index.md)
* [API Reference](https://developer.mastercard.com/open-finance-us/documentation/api-reference/index.md)