HTTPie is a useful HTTP CLI client with sensible defaults, built-in JSON support via an expressive and intuitive command syntax.
On OSX, you can install using HomeBrew - brew install httpie and invoked using http.
Upload a file using redirected input
http example.com < file.json
Download a file
http example.com/file > file
http --download example.com/file
Send API data from file
http POST api.example.com/person/1 < person.json
Basic Auth
http -a username:password example.com
Digest Auth
http --auth-type=digest -a username:password example.org
With Password Prompt
http -a username example.com
Custom HTTP method HTTP headers and JSON data:
http PUT example.com X-API-Token:12345 name=Pavan
Submitting forms:
http -f POST example.com hello=World