# 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.
[![](https://img.shields.io/github/stars/Mastercard/finicity-postman.svg?label=View%20on%20GitHub&style=social)](https://github.com/Mastercard/open-banking-us-postman)

## 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: [![](https://static.developer.mastercard.com/content/open-finance-us/uploads/postman-button.svg)](https://god.gw.postman.com/run-collection/26779181-9e1743cb-a29b-47cc-9869-3bcf577c5db5?action=collection%2Ffork&collection-url=entityId%3D26779181-9e1743cb-a29b-47cc-9869-3bcf577c5db5%26entityType%3Dcollection%26workspaceId%3D0d6593a8-1921-4fe4-a73c-687c945c5c02#?env%5B%F0%9F%87%BA%F0%9F%87%B8%20Mastercard%20Open%20Banking%20Environment%20US%5D=W3sia2V5IjoicGFydG5lcklkIiwidmFsdWUiOiJ7Y2hhbmdlbWV9IiwiZW5hYmxlZCI6dHJ1ZSwidHlwZSI6ImRlZmF1bHQiLCJzZXNzaW9uVmFsdWUiOiJ7Y2hhbmdlbWV9Iiwic2Vzc2lvbkluZGV4IjowfSx7ImtleSI6InBhcnRuZXJTZWNyZXQiLCJ2YWx1ZSI6IntjaGFuZ2VtZX0iLCJlbmFibGVkIjp0cnVlLCJ0eXBlIjoiZGVmYXVsdCIsInNlc3Npb25WYWx1ZSI6IntjaGFuZ2VtZX0iLCJzZXNzaW9uSW5kZXgiOjF9LHsia2V5IjoiYXBwS2V5IiwidmFsdWUiOiJ7Y2hhbmdlbWV9IiwiZW5hYmxlZCI6dHJ1ZSwidHlwZSI6ImRlZmF1bHQiLCJzZXNzaW9uVmFsdWUiOiJ7Y2hhbmdlbWV9Iiwic2Vzc2lvbkluZGV4IjoyfSx7ImtleSI6ImN1c3RvbWVySWQiLCJ2YWx1ZSI6IntjaGFuZ2VtZX0iLCJlbmFibGVkIjp0cnVlLCJ0eXBlIjoidGV4dCIsInNlc3Npb25WYWx1ZSI6IntjaGFuZ2VtZX0iLCJzZXNzaW9uSW5kZXgiOjN9LHsia2V5Ijoibm93SXNvODYwMSIsInZhbHVlIjoiIiwiZW5hYmxlZCI6dHJ1ZSwidHlwZSI6ImFueSIsInNlc3Npb25WYWx1ZSI6IiIsInNlc3Npb25JbmRleCI6NH0seyJrZXkiOiJ0b21vcnJvd0lzbzg2MDEiLCJ2YWx1ZSI6IiIsImVuYWJsZWQiOnRydWUsInR5cGUiOiJhbnkiLCJzZXNzaW9uVmFsdWUiOiIiLCJzZXNzaW9uSW5kZXgiOjV9XQ==)
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)