2016–09–28: WeChat now offers pretty comprehensove descriptions, documentation and case studies of its various platform and payment APIs in English for both the mainland China and international platforms on the following site: open.wechat.com
2015-04-23 Update: WeChat's official accounts platform APIs documentation has recently updated including new APIs for web-based access to WeChat features such as voice messages, GPS location, and QR code scanning.
WeChat Official Account Admin Platform
ORIGINAL POST:
WeChat has two open interfaces for developers. For third party app integration you can use:
http://open.weixin.qq.com
Access for most developers is restricted to sharing on 'Moments' or sending special content types on Chat. There is no currently open access to the chat function.
In addition, there is additional documentation for the official channels here:
https://mp.weixin.qq.com
We are now developing application to connect to Wechat. But I could told you resource is very limited.
look at their description.
You can only have very limit info, for us to connect the wechat data to our database.
You may say the ToUserName/FromUserName using the Wechat ID is good to have, but it is not the unique ID! A user could change its Wechat ID, instead there is two critical identifier UDID/Device ID (the device, e.g. Mobile/Tablet/Desktop application) that is completely unique for the session, and the wechat unique ID (which is a 16 digit long identifier) missing in the API which makes the API almost uselesss.
If you want more indepth discussion, here is the stack overflow thread that give you more details.
Is there a Web API for WeChat?
Hope this help.
pl.
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