Introduction

Simplex by Nuvei is an EU-licensed financial institution empowering the crypto industry with a full fiat infrastructure. We enable crypto-to-fiat and fiat-to-crypto transactions via multiple payment methods, with a 100% chargeback guarantee and industry leading conversion.
For our partners, we offer a variety of ways to integrate with us.

iFrame Integration

Simplex's "plug and play" widget for fast and easy integration.

Learn more about using the iFrame Integration.

Wallet API Integration

Simplex's strongest and most advanced API based integration. This integration is targeted at partners who have the ability to send API requests from a server with static IPs. If you have a client side application only please contact our integration team to hear more details on our JWT integration.
The Wallet API integration includes the following API calls:

🏷️ Get Quote

The Quote API allows you to retrieve current prices for an order. The order can be of any supported cryptocurrency, fiat and payment method.

💳 Initiate Payment

The Payment API allows you the share data about the user and transaction before reaching the payment checkout stage. This step always follows the Quote API.

📑 Create Checkout

The checkout initialization can be implemented in one of two ways:

• New window - users will be redirected to a separate page to complete the transaction
• Widget - users will stay on your page and will see the checkout as a pop-up widget allowing them to complete the transaction

🔀 Events

The Events API allows you to follow the status of a transaction - either submitted, approved or declined.
The event for each change is generated on the events queue which you can poll. Once you have read the status you will need to delete that event from the queue.
Learn more about using the Events API.

Wallet API Host

The environments can be accessed via the API hosts below.

General APIs

The General API contains various informative end-points such as possible fiat currencies, cryptocurrencies & countries that is available to your customers.
You can also retrieve information about a specific payment method.

🔄 Supported by Simplex API

• Crypto Currencies

• Fiat Currencies

• Countries

📋 Reporting API

• Get Payments

  This end-point enables you to retrieve your transactions data.
  the transactions are listed in sorted with the latest
  transactions listed first and supports paging.

Let's start!