API key validity

I have got an API key after registration. Just wanted to know whether the key will be valid for forever?

I would never say forever as we may chose to recycle the keys or change them in the future. However there are no plans in the short term to do this. You will of course receive a 401 error if the key is no longer valid or recognised.

Thanks for your reply, will there be any notice in advance if key is going to change due to any reason?