You can watch the video below for a quick walkthrough of how to get your BigCommerce API credentials:
Alternatively, follow these steps:
1. Go to Settings > Store-level API accounts in your BigCommerce control panel.

2. Click Create API Account

3. Enter a name, select V2/V3 API Token, and set the required API resources to Modify. See BigCommerce’s OAuth scopes reference for details about each permission.

4. Copy the API Path, click Save, and retrieve the Access token from the downloaded credentials file.

5. Enter both credentials into the corresponding fields in our migration setup. Please keep the credentials file secure because it provides access to your store data.
For more details, read our complete BigCommerce API guide.
In case you have any other questions, please email us at [email protected].