Provide JSON Exports of Completed Brackets
It would be sweet if brackets could be exported to JSON. It would provide tournament organizers a quick and convenient way to submit a completed bracket to an automated system for things such as data-mining, season-long record keeping/scoring, etc.

This is currently possible with our API. After getting a key from your account settings, you can request JSON or XML for your tournament, including its matches and participants:
API documentation can be found at http://challonge.com/api
Hope this works for you!
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Jeffery commented
Hey Foster Williams, I had this problem too and I figure out how to fix it. To do so, go into the tournament settings and change the host to one that is a user now in a organization then try the things above and it'll work. Once you do that, you can go back to the tournament and change back the host and the tournament will be back at it's same spot.
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Foster Williams commented
How do I do this if there is a subdomain on the tournament? for example "rtp.challonge.com/rtp38"
It seems replacing the tournament url with rtp38 does not work.