I have added Codeforces rating histories to my site. If you use same handle name for both sites, you can see Codeforces rating graph at https://competitiveprogramming.info/topcoder/handle/YOUR_TOPCODER_HANDLE

(here is mine: https://competitiveprogramming.info/topcoder/handle/hotpepsi )

Thanks for providing API, Codeforces!