I can tell you that a large majority of in-production API docs use Stripe's docs as a template. I did it for my company, and I've seen a ton of other API services do it. Stripe leads in API docs, so it's easier to not reinvent the wheel and just do what works. I know this instance isn't even for a production product, but meh.
[1] https://stripe.com/docs/webhooks#what-are-webhooks