I was not able to find any wireless outdoor PIR sensor that could be easily integrated via IFTTT or Angelcam´s API on the stores in Europe. There are a lot of indoor sensors though. Outdoor PIR sensors need to handle challenging outdoor conditions and typically generate more false alarms if they are not of exceptional quality and installed by professionals.
There of course are solutions that are mostly wired and are dependent on a “bridge” device that sends the alarm messages to the Angelcam cloud, but the cost is a bit higher and typically the professional installation is required.
We do have a great experiences with “low-cost” thermal cameras (https://www.axis.com/cs-cz/products/axis-p1280e) that have close to zero false alarms. The downsize of it is a higher price-tag of 850 USD per camera.
What is your budget you´re willing to spend on this?