Here's a version that uses a "socket platform," which does the hard work. The code is overly complicated and longer than it would need to be, but it also doesn't require much to make it work or keep working.

All you need to worry about is the "twitchuptime" alias. If the script breaks or something changes, it's the one you need to change/fix/update.
Code:
on *:text:!uptime *:#: {
  if ($mysocket(twitchuptime,https://decapi.me/twitch/uptime.php?channel= $+ $2)) {
    hadd $v1 channel #
    hadd $v1 stream $2
  }
}

alias twitchuptime {
  if ($2 == error) msg $hget($1,channel) An error occurred, please try again.
  else {
    tokenize 32 $1 $bvar(&mysocket,1,300).text
    if ($2- = Channel is not live.) msg $hget($1,channel) $qt($hget($1,stream)) is not live currently.
    elseif ($2- == Channel does not exist.) msg $hget($1,channel) $qt($hget($1,stream)) doesn't exist.
    else msg $hget($1,channel) $qt($hget($1,stream)) has been live for $2-
  }
}

alias mysocket {
  if (www.?*.??* iswm $2) tokenize 32 $1 http:// $+ $2
  if (http://?*.??* iswm $2) || (https://?*.??* iswm $2) {
    var %e = $iif($gettok($2,1,47) == https:,-e),%a $gettok($2,2,47),%p $iif($gettok(%a,2,58) isnum 60-65535,$v1,$iif(%e,443,80)),%a $gettok(%a,1,58),%s $sha1($2,0) $+ .mysocket
    mysocket.k %s
    hadd %s command $1
    hadd %s full $2
    hadd %s port %p
    hadd %s host %a
    hadd %s path $iif($gettok($2,3-,47),/ $+ $v1 $+ $iif($right($2,1) == /,/),/)
    hadd %s r 0
    sockopen %e %s %a %p
    .timermysocket. $+ %s -io 1 60 mysocket.t %s
    if ($isid) return %s
  }
  else $iif($isid,return,echo -a Invalid input, us as: /mysocket <command> <link>)
}

alias -l mysocket.t $hget($1,command) $1 error open Connection timeout | mysocket.k $1

alias -l mysocket.k hfree -w $1 | sockclose $1 | .timermysocket. $+ $1 off | .remove $1 | unset %c.t

on *:sockopen:*.mysocket: {
  tokenize 32 $sockname
  if ($sockerr) mysocket.e $1 open
  else {
    sockwrite -tn $1 GET $hget($1,path) HTTP/1.1
    sockwrite -tn $1 Host: $hget($1,host)
    sockwrite -tn $1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:44.0) Gecko/20100101 Firefox/45.0
    sockwrite -tn $1 Accept: text/html
    sockwrite -tn $1 Connection: close
    sockwrite -t $1 $crlf
  }
}

on *:sockread:*.mysocket: {
  tokenize 32 $sockname
  if ($sockerr) mysocket.e $1 read
  elseif ($hget($1,r)) mysocket.r $1
  else {
    sockread -f %c.t
    while ($sockbr > 2) { hadd $1 %c.t | sockread -f %c.t }
    if ($sockbr) { hadd $1 r $calc($sock($1).rcvd +$iif($hget($1,Content-Length:) <= 2097152,$v1,$v2)) | if ($sock($1).rq) mysocket.r $1 }
  }
}

on *:sockclose:*.mysocket:mysocket.d $sockname

alias -l mysocket.r sockread $sock($1).rq &b | bwrite $1 -1 &b | if ($sock($1).rcvd >= $hget($1,r)) mysocket.d $1

alias -l mysocket.e $hget($1,command) $1 error $2 $sockerr $sock($1).wsmsg | mysocket.k $1

alias -l mysocket.d {
  if ($hget($1,Transfer-Encoding:) == chunked) {
    var %y = 1
    bread $1 0 $file($1).size &f
    while ($bfind(&f,%y,$crlf).text) {
      var %v = $v1,%h $bvar(&f,%y,$calc(%v -%y)).text,%r $base(%h,16,10),%y $calc(%v +4+%r)
      if (%r == 0) break
      else bcopy &mysocket $calc(1+$bvar(&mysocket,0)) &f $calc(2+%v) %r
    }
  }
  else bread $1 0 $file($1).size &mysocket
  $hget($1,command) $1 $iif($bvar(&mysocket,0),done,error read No data received.)
  mysocket.k $1
}


And just to be safe, here's the closest thing to the "mysocket" documentation that's available: http://forums.mirc.com/ubbthreads.php/topics/256954/Re:_Brain_frazzled_would_love_#Post256954