BigCommerce API Connection

BigCommerce API Connection

A valid BigCommerce API connection gives Next-Cart the authorized platform access required by the selected migration path.

The goal is to create a store-level API account and prepare the values Next-Cart needs for connection testing.

Protect BigCommerce credentials

BigCommerce access tokens and client secrets must not be shared through unencrypted messages. Copy them directly into Next-Cart or store them in an approved secure location.

When to use this guide

Use this guide when:

• the selected platform is BigCommerce;
• Next-Cart asks for BigCommerce API credentials;
• you can access the BigCommerce store control panel;
• you can create or manage store-level API accounts.

Prerequisites

Requirement	Why it matters
Store control panel access	Store-level API accounts are created from the BigCommerce control panel.
Permission to manage API accounts	You need permission to create or delete store-level API credentials.
Migration scope	API scopes should cover the data types selected for migration.
Secure credential handling	Client secrets and access tokens should be protected.

Required values

Value	Where to find it	Notes
API Path	Store-level API account credentials file or credential screen.	This is the store API URL.
Access Token	Store-level API account credentials.	Most REST requests use this token.
Client ID	Store-level API account credentials.	Enter it if Next-Cart asks for it.
Client Secret	Store-level API account credentials, if requested.	Treat it as sensitive. Enter it only if Next-Cart asks for it.

Create a store-level API account

1. Sign in to the BigCommerce control panel.
2. Open Settings.
3. Open Store-level API accounts.
4. Create a new API account.
5. Choose a store-level API credential type when prompted.
6. Use a clear name such as Next-Cart Migration.
7. Grant the minimum read permissions needed for the selected migration scope, such as Products, Customers, Orders, and Store Information.
8. Save the API account.
9. Download the credentials file if BigCommerce provides one.
10. Copy the API Path, Access Token, and Client ID if requested by Next-Cart.

Enter the values in Next-Cart

In Next-Cart, enter the BigCommerce API Path, Access Token, and Client ID if the field appears.

Use values from the API account created for the store in the purchased migration path.

Expected result

Next-Cart has the BigCommerce store-level API details required for connection testing.

Verify the connection

Check	Pass condition
API account	The API account exists in the BigCommerce control panel.
API Path	The API Path is copied from the credential screen or credentials file.
Access Token	The token is copied exactly and protected.
Scopes	The account has access to the selected data types.
Connection test	Next-Cart verifies access without authentication or scope errors.

If the connection fails

Issue	What to check
Access token rejected	Re-copy the token from the credential file or create a new API account.
API Path rejected	Confirm the API Path belongs to the intended store.
Scope or permission error	Grant the required store resource scopes or create a new API account with the correct permissions.
Client ID requested but missing	Check the credentials file and enter the Client ID if Next-Cart asks for it.
Credentials exposed	Delete the API account and create a new one.

Security cleanup

After migration work is complete and verified, delete the temporary BigCommerce API account if it is no longer needed.

Deleting an API account is not reversible. Confirm that no other integration depends on it before deletion.

Next step

Situation	Go to
API values are ready	Verify Platform Connections
You need general API setup guidance	Set Up an API Connection
The connection test fails	Troubleshoot Connection Setup