How to apply the BigCommerce API
Go to BigCommerce Store control panel, click Account Setting in the menu.
Click API Accounts
Click Create API Account
Customize your API Name, save API Path link (needed later).
Choose Modify for all-access, click Save
A successful save will display the pop-up shown below. It will contain the API credentials that your app will need for OAuth access. Also, a .txt file containing the same credentials will (on most browsers) download to your computer.
How to Integrate BigCommerce with Eiz OMS Basic
Log in your Eiz OMS Basic Account > Click the Marketplace/Store Icon on the dashboard, Click Add more stores button, then Click bigcommerce button.
Copy and Paste all the information needed (Access Token, Client ID, API Path).
Click “Validate and Save”
You have now completed the bigcommerce integration, switch on order sync, and start to process your bigcommerce orders in Eiz OMS Basic!