The BigCommerce connector is a Palantir-provided driver connector. The official documentation for this driver can be found here ↗.
Networking
If using an agent connection, the agent must be allowed to connect to the system you choose. This means that the agent must be able to reach the destination IP address, and the destination system must be configured to allow connections from the agent.
If using a direct connection, be sure to add the following egress policies to the connector:
Domain
Required
login.bigcommerce.com
Always. Auth and token endpoints
api.bigcommerce.com
Always
store-{STORE_ID}.mybigcommerce.com
Always. Looks like it is used in some cases where you are inserting/updating data