I’ll second a static IP from your ISP is probably what you need. However oven never had one and I don’t think my external IP ever changed. As long as the integration isn’t critical, given my own experience, I’d probably risk it and then decide if I needed to get a static IP.

Now you might also consider getting a n inexpensive VPS and route through that server which would likely have a static out bound block of IPs.

Smarter people than me are here though. I’m still in the “fear of opening ports to the internet” while at home phase.