I want to develop an Open Source Project with Stack Exchange API. So I have to publish the API key there. But a single IP address can only make a certain number of API requests per day, depending on the presence of a valid API key. So I need to protect my API key. How can I do that?
An another reason to protect my API key is to stop unwanted usage of the API key. Anyone can use my API key to test there applications. I want to protect that.
How can I do that?