This tool could be a better alternative to Ngrok/Localtunnel to relay requests to localhost but with a convenient GUI. It's free and the source code is published on GitHub. Also it's a charityware.
The tool provides a unique https endpoint to accept webhook requests.
And then it retranslates them in realtime into localhost using your the node.js engine which powers VS Code extensions - node.js from VS Code grabs requests info and triggers them into localhost.