Need help with webhook/web api

[Peter_Kawa]

Might be relevant, there’s an app for the FP2 already:

[APP][Pro] HomeKit Controller - for a better Homey

Project started as a way to include the Aqara FP2-sensor via Homekit into Homey. App is now more generic, many services and capabilities are supported. If you encounter problems, please PM me a short note and a copy of the log where you add the device. Generic procedure to add a device. Add your Homekit capable device to the app that came with the device and configure it. If added with iOS device, remove the device from the iOS Home app, a device only can have one controller. Most of the tim…

When you just like to build an app for it anyways, please ignore my reply

Also, Adrian tried the way you seems to want to go already:

@Adrian_Rockall

here is currently no way to connect locally to the FP2, so the only option is via their cloud API, which is a complete mess.