post https://sandbox.finmid.com/api/v2/b2b-payments/webhook-endpoints
Webhooks are used to inform your platform about events that occur on finmid side. (e.g. a buyer has been activated). To start receiving webhooks, create an endpoint using this API. An endpoint accepts a URL that receives webhooks along with additional security configuration.
The auth_username and auth_password fields let you configure HTTP basic auth for webhooks. Additionally, every webhook payload will be digitally signed using the provided signature_secret.
You can read more about webhooks here.