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

Let’s look at the steps needed to use Marqeta’s Core API.

## Create an account

**Step 1:** Head over to [Marqeta's Registration Page](https://www.marqeta.com/users/sign_up) to create an account.
Fill in the account creation form and click the "CREATE ACCOUNT" button.

**Step 2:** An account verification email will be sent to the registered email address you used to register your account. Click the verification button provided in the email.

**Step 3:** Click the "RETURN TO SIGN IN" button to redirect to the sign-in page.

**Step 4:** Sign in using your registered email and password.

> **Note:** When you sign in, you might have to enter your phone number to verify your identity as part of the 2-step verification process.

## Create a sandbox

After you’ve created your account and signed in, it’s time to make a sandbox to simulate transactions on the Marqeta platform.

**Step 1:** Click the “Create sandbox” button. You’ll see a message on your screen that says that your sandbox will be created shortly. Please wait patiently because the sandbox may take a few minutes to be ready.

**Step 2:** You’ll be redirected to the dashboard as soon as your sandbox is ready. You’ll also receive an email containing a button redirecting you to the dashboard.

On the dashboard, you’ll find your API keys. These will include the following items:
* The application token identifies the API client.
* The admin access token allows access to the sandbox.
* We append the endpoint to the base URL when we make API requests.

Copy the “Application token,” “Admin access token,” and the “Base URL.”  Then click the "Edit" button in the code widget below. Enter the three values in their respective fields and click the "Save" button.

## Set up the API keys 

Click the "Run" button in the code widget below to validate the API keys.

After you've created your account (along with a sandbox) and set up your API keys, you're ready to make your first call to Marqeta's Core API.

Let’s look at the steps needed to use Marqeta’s Core API.

# Create an account

**Step 1:** Head over to [Marqeta's Registration Page](https://www.marqeta.com/users/sign_up) to create an account.
Fill in the account creation form and click the "CREATE ACCOUNT" button.

**Step 2:** An account verification email will be sent to the registered email address you used to register your account. Click the verification button provided in the email.

**Step 3:** Click the "RETURN TO SIGN IN" button to redirect to the sign-in page.

**Step 4:** Sign in using your registered email and password.

> **Note:** When you sign in, you might have to enter your phone number to verify your identity as part of the 2-step verification process.

# Create a sandbox

After you’ve created your account and signed in, it’s time to make a sandbox to simulate transactions on the Marqeta platform.

**Step 1:** Click the “Create sandbox” button. You’ll see a message on your screen that says that your sandbox will be created shortly. Please wait patiently because the sandbox may take a few minutes to be ready.

**Step 2:** You’ll be redirected to the dashboard as soon as your sandbox is ready. You’ll also receive an email containing a button redirecting you to the dashboard.

On the dashboard, you’ll find your API keys. These will include the following items:
* The application token identifies the API client.
* The admin access token allows access to the sandbox.
* We append the endpoint to the base URL when we make API requests.

Copy the “Application token,” “Admin access token,” and the “Base URL.”  Then click the "Edit" button in the code widget below. Enter the three values in their respective fields and click the "Save" button.

# Set up the API keys 

Click the "Run" button in the code widget below to validate the API keys.

Learn to create a Marqeta sandbox account to call the Marqeta API.

Introduction

Users

Card Products

Cards

General Purpose Accounts

Transactions

Marqeta API Integration in React

Conclusion

Appendix

Getting Started with Marqeta API

Create an account

Create a sandbox

Set up the API keys