WebThings with the Flask HTTP requests with the HTTP addon or an External Web Hook

I’m currently looking to trigger an action using the rule using the HTTP add-on on the WebThing IOT. When working on two sensors which are available on rules then they trigger fine. When giving an external web hook from dev site like webhook.site https://webhook.site/b0378f92-5443-4fb6-8d4c-ecd5109d307f (this is not working). I’m more interested in integrating the local flask application with the WebThings. Any leads on this would be helpful. The Flask application will update the DB on cloud.