Hurl is back: http://hurl.it/

nice service. You should add some formatting for JSON like the JSONView extension does, and the ability to view the response content only

Also, short URLs FTW. eg:

hurl.it/s5gJ#h5 would link to a particular request and highlight the fifth header line.

hurl.it/s5gJ#c12 would highlight the 12th line in the content.