Trigger a flow from external call (QUESTION)

[zenofmud]

In a situation like this it is very helpful if you provide your flow, espically as you say this is just a test.

Also provide
os platform and release
versions of NR and node.js

Also where is this button you are pressing?

P.S. having just installed the Create an HTTP Endpoint flow on my local machine, when I click the link in your post, the Hello World is returned