How to create an URL that execute a Home assistant service?

I need to give to some external service people the possibility to toggle a Home Assistant switch.
Prefer not to give them full access to Home Assistant.

I was thinking (if possible) to create an URL to the toggle service, give the service people this URL, that they will use during their works, and thats it.

Is it possible? Or alternative ideas?

Have a look for webhooks, that should do it