Thanks to @mgerrior, I just added like buttons for your projects:
http://nealrs.github.io/devpost-follow-button/?project=unofficial-challengepost-api&type=like&count=true&size=large
All it takes is 2 changes to the param string:
project=project_url_slugtype=like
And BAM:
FYI: I'm going to change the button URL at some point, but I'll keep you updated.
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