Can't add query param to Webhook URL

[lilistoyanovamn]

Hi,

I'm configuring a webhook for a Salesforce commerce integration but I get an error when trying to add query params to the webhook URL. The merchant portal rejects:

  /services/data/vNN.0/commerce/payments/notify?provider=<paymentGatewayProviderId>

The receiving platform requires a query string for routing, and the value isn't a secret.

Questions:

1. Is there a way to add a webhook URL with a query string?
2. If not is there an officially recommended pattern for integrating with platforms whose webhook receivers require query parameters?

Thanks!