APPLICATION_TOKEN

ADMIN_ACCESS_TOKEN

BASE_URL

USER_TOKEN

CARD_PRODUCT_TOKEN

CARD_TOKEN

TRANSACTION_TOKEN

TRANSACTION_AMOUNT

GPA_ORDER_TOKEN

GPA_UNLOAD_TOKEN

Gain insights into Marqeta's Core API, explore resource management, simulate transactions, and create a simple application. Discover recommendations and deepen your Marqeta integration skills.

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 **general purpose account (GPA)** is a user's default account. Funds are transferred from a funding source to a user's GPA.

# Types of GPA balances
Let's take a look at the different types of GPA balances that are available for a user or a business:
* In regards to standard funding, a **ledger balance** is an amount that refers to available funds. This includes those from authorized transactions that are yet to be cleared. Regarding #key# Just-in-Time (JIT) funding: Just-in-Time (JIT) funding allows funds to be moved automatically from the program's funding source to the appropriate account when a transaction is conducted. #key#, this refers to authorized funds that are yet to be cleared and are currently on hold.
* **Available balance** refers to the user's purchasing power. This is the amount that results from deducting authorized transactions that are yet to be cleared from the ledger balance. This balance is 0.00 if the user uses JIT funding.
* **Pending credits** refer to the #key# ACH: This stands for Automated Clearing House and is a payment system used by US banking networks. Transactions performed are sent to the network for clearance once a day at a designated time. #key# loads that are accepted but are still pending clearance.
* **Cached balance** and **credit balance** are not used at this time.

# Get GPA balances
We can get all GPA balances for a user or a business by making a `GET` request to the `{BASE_URL}/balances/{token}` endpoint. The path parameter (`{token}`) refers to the token of the user or business whose GPA balances we want to get. This endpoint also provides us with a link to the GPA balances of the specified user or business in the response.

## Request parameters
This endpoint requires a single request parameter, which is described below:

Learn about general purpose accounts (GPAs), their balances, and how to get them.

Introduction

Users

Card Products

Cards

General Purpose Accounts

Transactions

Build the Frontend of a Financial Application Using React

Marqeta API Integration in React

Conclusion

Appendix

GPAs and Balances

Types of GPA balances