How to correctly specify the API URL in BSG World SMS

Hello, for this integration we always knock on https://api.bsg.hk/v1.0/ .

Good. And how then to connect the integration that we need?
Need improvement?

I will explain in more detail.
BSG has a platform rental service. For the agreed price, you can rent a platform for yourself. We are deploying an image of the platform on a separate server. They bind to our domain names. Next, we connect our provider's gateway there and use it.
That is, the same bsg differs only in the domain name.
The API is also identical, the only difference is in the Endpoint (the URL to which to send requests)
It turns out that we only need to replace the endpoint (the URL to send requests to) in the current integration.
How can this be done??

Not at the moment. But it can be done in 2 hours so you can use your endpoint

Oh great.
Can you do the same for Viber messages?
And how many hours does it take?

Yes. At https://crm.sportlife.ua/, along with the purchase of licenses, there were 100 hours of improvements.
Can we do it for them?
And what you need to do?

Let's do!