# Postman Collection
source: https://developer.mastercard.com/agent-suite-for-merchants/documentation/developer-tools/postman-collection/index.md

👉 Keep this page only if Postman is a supported testing path for your service. If you keep the CTA, update the button shortcode values so the button type stays `primary`, the `url` points to your real collection or workspace, the label reads what you want users to click, and the existing `class` values are preserved unless you intentionally change the spacing. Replace the destination links and prerequisites if you provide a service-specific collection or workspace.

## Postman Collection {#postman-collection}

Use Postman to test Mastercard APIs with a ready-made workflow for importing collections, configuring environments, and validating requests in Sandbox or Production.

For the full step-by-step guide, open the [Postman Collection guide](https://developer.mastercard.com/platform/documentation/developer-tools/postman-collection/).
POSTMAN WORKSPACE

Open the official Mastercard Postman workspace to fork collections and start testing faster.
Run in Postman

## Overview {#overview}

The Postman guide covers how to set up Mastercard API requests in Postman, including collection setup, environment and base URL configuration, authentication setup, and encryption handling.

## Prerequisites {#prerequisites}

* Access to a Mastercard Developers project with the credentials required by the API you are testing
* A Postman account and either the Postman web app or desktop application
* The correct authentication and encryption details for the service you want to call

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

* Collection setup by forking a Mastercard workspace or importing an OpenAPI specification
* Environment and base URL configuration for Sandbox and Production
* Authentication guidance for OAuth 1.0a, OAuth 2.0 / FAPI 2.0, and MTLS
* Encryption setup steps for Mastercard encryption and JWE-based flows

If you are not redirected automatically, open the [Postman Collection guide](https://developer.mastercard.com/platform/documentation/developer-tools/postman-collection/).