curl some-api-returning-json.local | php -r '$o="";while($l=fgets(STDIN))$o.=$l;print_r(json_decode($o,1));'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 135 0 135 0 0 4061 0 --:--:-- --:--:-- --:--:-- 4090
Array
(
[api] => someAPI
[version] => 1.0.0
[tagline] => Whatever
)