diff --git a/lib/KolmisoftMore/KolmisoftMore.php b/lib/KolmisoftMore/KolmisoftMore.php
new file mode 100644
index 000000000..a1c111c23
--- /dev/null
+++ b/lib/KolmisoftMore/KolmisoftMore.php
@@ -0,0 +1,82 @@
+<?php
+
+class KolmisoftMore {
+    private string $host;
+    private string $username;
+    private string $apiKey;
+
+    public function __construct($host, $apiKey, $username) {
+        $this->host = $host;
+        $this->apiKey = $apiKey;
+        $this->username = $username;
+    }
+
+    /**
+     * Generate hash for the given query parameters
+     * @param $queryParameters - Array of query parameters to generate hash
+     * @return string
+     */
+    public function generateHash($queryParameters): string {
+        // concatenate all query parameters values in order of the array and then add apiKey to the end
+
+        $queryString = implode('', $queryParameters);
+        $queryString .= $this->apiKey;
+
+        return hash('sha1', $queryString);
+    }
+
+    /**
+     * Make a request to the Kolmisoft API
+     * @param $path - API path
+     * @param $queryString - Query string
+     * @return array|bool
+     */
+    public function makeRequest($path, $queryString) {
+        $url = "https://{$this->host}/billing/api/$path?$queryString";
+
+        $curl = curl_init();
+        curl_setopt($curl, CURLOPT_URL, $url);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+
+        $response = curl_exec($curl);
+
+        try {
+            $response = new SimpleXMLElement($response);
+        } catch (Exception $e) {
+            return false;
+        }
+
+        $response = json_decode(json_encode($response), true);
+
+        if (is_array($response)) {
+            return $response;
+        } else {
+            return false;
+        }
+    }
+
+    public function getVoiceCallHistory($startDate, $endDate) {
+
+        $queryParameters = [
+            'period_start' => $startDate,
+            'period_end' => $endDate
+        ];
+
+        $hash = $this->generateHash($queryParameters);
+
+        $queryParameters['hash'] = $hash;
+        $queryParameters['u'] = $this->username;
+
+        $queryString = http_build_query($queryParameters);
+
+        $response = $this->makeRequest('user_calls_get', $queryString);
+
+        if ($response) {
+            return $response['calls_stat']['calls']['call'];
+        } else {
+            return false;
+        }
+
+    }
+
+}
\ No newline at end of file