How do I gain an access token?
Once you have access to your Official Account or Sandbox Account, you will be able to generate/acquire a token.
Is there a fee to make an application available to the public?
No there is not. You simply host it on your registered Official Account on WeChat.
Are there guidelines as to what I can develop within WeChat?
There are guidelines and other resources for developers at http://admin.wechat.com/wiki/ and http://dev.wechat.com/
Where can I access WeChat APIs?
For full documentation and instructions on the WeChat APIs, visit the WeChat Developer Wiki at http://admin.wechat.com/wiki/
How do I set up a developer account?
Sign up at http://dev.wechat.com/signup to create a developer account. Sandbox accounts allow you to test your code from end to end, ensuring a fool-proof product at the end of your endeavour.
Is there a fee to use Official Accounts?
There is no fee in acquiring an Official Account, however, for full usage of a Service Account, you will need to either develop your own content management system or license a third-party platform such as WeChatBuilder.