# Postman
source: https://developer.mastercard.com/mastercard-gateway/documentation/testing/postman/index.md

* Postman Collections allow developers to test API calls in sandbox and production environments without writing any code. This makes it easy to share preconfigured API requests with partners and allows them to run individual API requests, requests within a folder, or the entire collection.

* To get started, see the [Postman Collections page](https://www.postman.com/mastercard/mastercard-developers/collection/4fakvrd/mastercard-gateway-api?action=share&source=copy-link&creator=0).

* For detailed instructions, see the [Postman tutorial](https://developer.mastercard.com/platform/documentation/developer-tools/postman-collection/).