For non production usage a sandbox account kan be requested. You will need a phone with an activated WeChat account though.
Use the following link:
https://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login Todo: get rid of automatic chinese link descriptions
Scan the qr code with the logged in WeChat app
We need:
the account name (top right)
the app id and the app secret
We provide you with:
the url
the token
then you will be able to activate the webhook.
Note: a lot is chinese, you can keep clicking on language buttons, but it will switch back to chinese. A Google translate app on your phone is your friend. switch to image mode.