APPLICATION_TOKEN

ADMIN_ACCESS_TOKEN

BASE_URL

USER_TOKEN

CARD_PRODUCT_TOKEN

CARD_TOKEN

TRANSACTION_TOKEN

TRANSACTION_AMOUNT

GPA_ORDER_TOKEN

GPA_UNLOAD_TOKEN

Marqeta's Core API allows companies to launch and manage their payment card programs.

Creating Payment Card Programs using Marqeta API in JavaScript.png

marqeta-final.tar.gz

Marqeta React App

Marqeta is a modern card issuing and transaction processing platform that streamlines business payments by working with card networks and issuing banks to issue cards, authorize transactions, and communicate with settlement entities.

In this course, you will learn about Marqeta’s Core API, its resources, and the relationships among them. Next, you will get to learn how to create and manage these resources and their relevant functionalities. Then, you will learn how to simulate transactions and their reversals in a sandbox test environment using a Marqeta payment card. In addition to this, you will also learn how to create a simple application using the Marqeta API integration. Finally, this course will provide some recommendations and resources for further exploration of Marqeta’s Core API and its integration.

After completing this course, you will be able to create a simple application with the Marqeta API integration and be able to implement a majority of its functionality.

Creating Payment Card Programs using Marqeta API in JavaScript

A **transaction** is the process of making a payment. We can use a Marqeta payment card to make a payment. An **authorization transaction** request includes the authorization details provided by the user and generates an electronic message that contains information used for payment processing.

In this lesson, we'll learn to simulate an authorization transaction and its reversal.

## Simulate an authorization transaction
We can simulate an authorization transaction by making a `POST` request to the `{BASE_URL}/simulate/authorization` endpoint. This endpoint requires the `card_token` and other authorization details to accompany the request.

> **Note:** This endpoint is only available within the sandbox, a test environment. It's not available within our production environment. The purpose of it is to be able to test the cards, users, and other objects we create in the sandbox.

### Request parameters
The above endpoint uses the following parameters:

A **transaction** is the process of making a payment. We can use a Marqeta payment card to make a payment. An **authorization transaction** request includes the authorization details provided by the user and generates an electronic message that contains information used for payment processing.

In this lesson, we'll learn to simulate an authorization transaction and its reversal.

# Simulate an authorization transaction
We can simulate an authorization transaction by making a `POST` request to the `{BASE_URL}/simulate/authorization` endpoint. This endpoint requires the `card_token` and other authorization details to accompany the request.

> **Note:** This endpoint is only available within the sandbox, a test environment. It's not available within our production environment. The purpose of it is to be able to test the cards, users, and other objects we create in the sandbox.

## Request parameters
The above endpoint uses the following parameters:

Learn about transactions, and how to simulate and reverse an authorization transaction.

Introduction

Users

Card Products

Cards

General Purpose Accounts

Transactions

Marqeta API Integration in React

Conclusion

Appendix

Simulate and Reverse a Transaction

Simulate an authorization transaction

Request parameters