https://spreadsheets.google.com/feeds/list/[[your key here]]/od6/public/values?alt=json

Source: http://blog.pamelafox.org/2013/06/exporting-google-spreadsheet-as-json.html

The author doesn't explain it super well, but if you just swap out your key for hers in the example provided in the comments, that works.

https://spreadsheets.google.com/feeds/list/[[your key here]]/od6/public/values?alt=json

Source: http://blog.pamelafox.org/2013/06/exporting-google-spreadsheet-as-json.html

The author doesn't explain it super well, but if you just swap out your key for hers in the example provided in the comments, that works.