# Installing and configuring our OpenCart Extension

The CryptAPI extension lets your OpenCart store receive payments in cryptocurrency, with a simple setup and no sign-ups required.

This page guides you through installing and configuring our OpenCart extension. For the full extension reference, see [OpenCart](/get-started/opencart).

## Installation Steps

### Step 1: Open the Installer

Log in to your OpenCart store's admin area and click **Extensions** to open a dropdown menu. Then click **Installer**.

![Installing and configuring our OpenCart Extension - Step 1](/kb/plugins/opencart-1.png)

### Step 2: Upload the extension

On the **Installer** page, click **Upload** and select the CryptAPI extension file.

> **INFO**
>Make sure the file name ends like this:
> 
> ```
> CryptAPIExtensionOC3.ocmod.zip
> ```
> 
> You may need to add the **.ocmod** part, otherwise OpenCart won't accept the file.


![Installing and configuring our OpenCart Extension - Step 2](/kb/plugins/opencart-2.png)

### Step 3: Go to Extensions

After you select the file, your store installs the CryptAPI extension. When it's done, your screen should look like this. Then click **Extensions**.

![Installing and configuring our OpenCart Extension - Step 3](/kb/plugins/opencart-3.png)

## Configuration Steps

### Step 4: Choose Payments

Click the select field and choose **Payments** from the list.

![Installing and configuring our OpenCart Extension - Step 4](/kb/plugins/opencart-4.png)

### Step 5: Edit CryptAPI

A list of payment extensions shows up. Find CryptAPI in the list and click the **pencil button** to start setting it up.

![Installing and configuring our OpenCart Extension - Step 5](/kb/plugins/opencart-5.png)

### Step 6: Check the settings page

If everything went right, you should now see this page.

![Installing and configuring our OpenCart Extension - Step 6](/kb/plugins/opencart-6.png)

### Step 7: Enable the extension

Set **Status** to **Enabled**. Otherwise the extension won't work, even if the rest is set up correctly.

Then look through the other settings and set them to suit your needs.

![Installing and configuring our OpenCart Extension - Step 7](/kb/plugins/opencart-7.png)

### Step 8: Choose your cryptocurrencies

Scroll down to **Accepted Cryptocurrencies**:

- **Cryptocurrency checkbox**: select the cryptocurrencies you want to accept in your store. You can tick several boxes.
- **Wallet address**: in the field to the right of each checkbox, paste your wallet address for that cryptocurrency.

> **INFO**
>You don't need an API key. If your version of the extension shows an **API Key** field, leave it empty.


![Installing and configuring our OpenCart Extension - Step 8](/kb/plugins/opencart-8.png)

### Step 9: Save

Click the save button. Your OpenCart store now accepts cryptocurrencies.

![Installing and configuring our OpenCart Extension - Step 9](/kb/plugins/opencart-9.png)