https://www.sec.gov/files/county.json?output=1 https://www.sec.gov/files/county.json?callback=foo https://www.sec.gov/files/county.json?jsonp=foo https://www.sec.gov/files/county.json?format=text https://www.sec.gov/files/county.json?type=txt https://www.sec.gov/files/county.json?download=1
https://www.sec.gov/files/county.json?source=.txt https://www.sec.gov/files/county.json?foo=.txt https://www.sec.gov/files/county.json?alt=media https://www.sec.gov/files/county.json.json.txt https://www.sec.gov/files/county.json?raw=1 https://www.sec.gov/files/county.json?_=1