First of all I love my Nest thermostat and as geeky as I am I had to see if I could write some Cocoa code to access it and pull back the data. Ultimately I wanted to build a status bar application to run on my Mac that would periodically update and display the current temperature. There is no public API as of yet but hopefully there will be soon. I searched the internet to see if anyone had written anything similar. Low and behold I found a Python script that would access the Nest data. You can get Scott Bakers Python script here https://github.com/smbaker/pynest . Thanks to Scott’s script I was able to see what data was required to make the request to the Nest website. This made my work a lot easier. I have created a basic Cocoa status bar application that uses my custom Nest class to query the Nest web site for my Nests data. I may release the code once I have cleaned it up some if anyone is interested.