Faster API REST - PHP

Question

Good morning Stack overflow!!

Next, I’m doing an integration with my bank Sql server of an APIRest, where I pass the information I want in the URL and receive the content as json, however, I perform several requests on this API as I make a SELECT in my bank that returns all the ID’s of the sales opportunities and I pass this ID in the API url, only once in a while there are some errors because the API allows only 100 requests every 10 seconds, I put a counter to perform a sleep, but still the error continues, follows code below:

while($RFP = odbc_fetch_array($result)) {

//contador que coloquei para o limite da requisição da api
   if($contador >= 96){
         $contador = 0;
         sleep(10); // 5 segundos para proxima requisitar da API
   }
   $url = "https://api.pipedrive.com/v1/deals/".$RFP['ID']."/flow?start=0&api_token=meutokenaqui";
   $ch = curl_init();

   curl_setopt($ch, CURLOPT_URL,$url );
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

   $cAlljson = curl_exec($ch);
   // liberar
   curl_close($ch);

   $contador = $contador + 1;  // Contador para limite de requisições da API

   // Decodifica o Json em Objeto
   $cAlljson = json_decode($cAlljson);
   $cAlljson = $cAlljson->data;



   if (is_array($cAlljson)){
   foreach($cAlljson as $e)
     {