We are moving away from github for hosting our docs at https://graphhopper.com/api/1/docs/ which is important for us as it gives better possibility to style them and it is easier to navigate through them. Thanks to the nice mkdocs project we have a very simple procedure to create them and the origin of the docs is still at github e.g. we change them there if you find issues. The same repo or directly via email can be used to report bugs of all kinds of the GraphHopper Directions API!
Let us know if you find old links, we’ll improve the docs further in the next days but they are now more or less stable.