How to dynamically create webhooks?

Question

PHP

Hello!
There are services, for example, Zapier, where you can create many Webhooks for specific purposes, each Webhook is a separate URL (for example, https://hooks.zapier.com/hooks/catch/1111111/222222/)
Interested in 2 questions:
1 ) What actually happens when creating such a Webhook. In general, a Webhook's URL is simply the path to the script on the site (domain.com/folder/username/idscript). It is not clear how it is created dynamically? Create a directory like this https://hooks.zapier.com/hooks/catch/1111111/222222/ ?
2) Are there any services through which it would be possible to dynamically create Webhooks separately for each user of my site? Purpose: to create a site where users would specify their API key for a third-party application and for each user their own webhook would be created, which would be linked to this user's account in a third-party service. As far as I understand, this is implemented in some online chats.
The request of knowledgeable people to share their experience in creating such things. Thanks in advance!

Answer 1

I have analyzed all the popular API frameworks. Given the specifics of what I wanted to store, I chose the Node.js (Hapi.js) + Mongo bundle.
In Hapi, it seemed to me the easiest way to start working with routes, request parameters, responses, etc. from scratch.
As a result, I nevertheless filed down my site, on which a person can register, and at the same time he will be assigned an individual link, which he can indicate in third-party services as a Webhook.

Answer 2

In fact, it is completely incomprehensible what is, what should be, and by what means you plan to achieve this. I can say one thing, any dynamism is done with the help of programming, so you need a programming language, ideally the same one that is already used on the server. And on it, many different implementations are possible with identifiers, tokens, and many other tricks.