diff --git a/api/external_ping_api/README b/api/external_ping_api/README
new file mode 100644
index 00000000..7e9ae590
--- /dev/null
+++ b/api/external_ping_api/README
@@ -0,0 +1,4 @@
+
+README / Instruction:
+
+
diff --git a/api/external_ping_api/config_sample.php b/api/external_ping_api/config_sample.php
new file mode 100644
index 00000000..1680d6a3
--- /dev/null
+++ b/api/external_ping_api/config_sample.php
@@ -0,0 +1,21 @@
+<?php
+
+
+//General
+$is_active=true;
+$only_allow_ip="";
+
+// index.php config
+//definition when will ping be old, in seconds
+$old_time_definition = 60;
+$create_non_exsisting_files=true;
+
+//keyit.php config
+$option_newkeydays=365; // Days until you need a new key
+$filename = 'key.config';
+$email_ricipiants_contacts = array("",);
+$key_name = "k";
+$key_length = 70;
+
+
+?>
\ No newline at end of file
diff --git a/api/external_ping_api/data/unze4u.txt b/api/external_ping_api/data/unze4u.txt
new file mode 100644
index 00000000..47ecedde
--- /dev/null
+++ b/api/external_ping_api/data/unze4u.txt
@@ -0,0 +1 @@
+1607040433
\ No newline at end of file
diff --git a/api/external_ping_api/index.php b/api/external_ping_api/index.php
new file mode 100644
index 00000000..50573f3c
--- /dev/null
+++ b/api/external_ping_api/index.php
@@ -0,0 +1,273 @@
+<?php
+/*
+Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/ 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
+THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+echo "<!-- Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/  -->";
+
+
+/*
+Identifier: CKrQsyvQRNJIMjZxb8JkkYoQTkJHqMI4jBcONhX1Yvsn9ZmgrFqRt9iQYNNMHYOZ6AHQhv7qFQUmBflxEe3DNMExHuVNDWFNboaIGLaaR391m8b4NApkI97ty4D8RaMG8WugCFGmeSBHwp6tS4fpay
+Date: 03.12.2020
+*/
+echo "<!-- Identifier: CKrQsyvQRNJIMjZxb8JkkYoQTkJHqMI4jBcONhX1Yvsn9ZmgrFqRt9iQYNNMHYOZ6AHQhv7qFQUmBflxEe3DNMExHuVNDWFNboaIGLaaR391m8b4NApkI97ty4D8RaMG8WugCFGmeSBHwp6tS4fpay -->";
+
+
+
+
+/* 
+##############################################################################################
+CODING
+##############################################################################################
+*/
+
+
+
+//Imports
+//Check key - $_GET["key"]; is read by keyit.php
+include_once("keyit.php");
+//Load options
+include_once("config.php");
+
+
+//Check if script is active
+if($is_active==false){
+    exit();
+}
+
+
+
+
+//Get vars to choose action
+
+  
+        //load and check GET vars
+        $index = check_and_give_me_get_input("i"); //index
+
+
+        $index_value = check_and_give_me_get_input("iv"); //index_value
+
+
+
+
+//check if both vars are set
+if (isset($index) == false ||  isset($index_value)== false){
+    throw new Exception('GET vars index (i) and index_value (iv) are not set correctly, try it by manual.');
+}else{
+//run  get or set
+
+//check if they are set
+switch ($index) {
+    case "get":
+        //GET
+        if (run_get($index_value,$old_time_definition)==true){}else{
+           //Error
+           throw new Exception('run_get function failed.'); 
+        }
+        break;
+    case "set":
+        //SET
+        if (run_set($index_value)==true){}else{
+            //Error
+            throw new Exception('run_set function failed.'); 
+         }
+
+        break;
+    default:
+        throw new Exception('GET vars index (i) and index_value (iv) are not set correctly, try it by manual.');
+}
+
+
+}
+
+
+
+
+
+// Functions
+
+
+//Main Functions
+function run_get($index_value, $old_time_definition){
+    //make HTML comment
+    echo "<!--Getting....-->";
+    
+                // generate file path
+                $file = "data/" . $index_value . ".txt";
+            
+                //check if file exist
+                if (test_file_existing($file)==false){
+
+                    if($create_non_exsisting_files=true){
+                            //create new dot file
+                             //Write  timestamp in new file
+                            write_in_file($file,"0");
+                    }
+                    else{
+                            //Throw exception, user should add file
+                        throw new Exception('index: ' . $index_value . " unknown. Please create it first.");
+                    }
+                }
+
+                //Open File
+                $information_file = read_from_file($file);
+
+                //Get now timestamp
+                $date = new DateTime();
+                $timestamp_now = $date->getTimestamp();
+
+                //calculate time diff
+                $time_diff = $timestamp_now - $information_file ;
+
+
+                // Check if older than 
+                if ($information_file + ($old_time_definition) < $timestamp_now){
+
+
+
+                //Last updtae is older than x time
+                echo "Older than " . $old_time_definition . "sec. Timediff: " . $time_diff . " sec." ;
+
+
+                }else{
+                // Last update is NOT older than x time
+                echo "Last update " . $information_file . "Timediff: " . $time_diff . " sec."  ;
+
+
+                }
+
+
+            
+            //Secure file
+            secure_file($file);
+
+
+            //giveback ok
+            return true;
+
+
+}
+
+
+function run_set($index_value){
+    //make HTML comment
+    echo "<!--Setting....-->";
+
+    
+    // generate file path
+    $file = "data/" . $index_value . ".txt";
+            
+
+    //Get now timestamp
+    $date = new DateTime();
+    $timestamp_now = $date->getTimestamp();
+
+
+    //Write update timestamp in file
+    write_in_file($file,$timestamp_now);
+
+
+    // Giveout OK
+    echo "OK: " .     $timestamp_now ;
+
+
+    //Secure file
+    secure_file($file);
+
+
+    //return ok
+    return true;
+}
+
+
+
+
+
+// Subfunctions
+
+
+function check_and_give_me_get_input($get_var_name_input){
+
+    if ((isset($_GET[$get_var_name_input])) && (!empty($_GET[$get_var_name_input]))) {
+
+        if(ctype_alnum($_GET[$get_var_name_input])==true){
+            //allright
+            return $_GET[$get_var_name_input];
+        }else{
+                            // Get Var is empty
+                            throw new Exception('GET var: ' . $get_var_name_input . " are not only numbers or letters.");
+        }
+
+    }else{
+            // Get Var is empty
+            throw new Exception('GET var: ' . $get_var_name_input . " is empty.");
+    }
+
+}
+function read_from_file($file_name){
+
+    try {
+//Open File
+        $myfile = fopen($file_name, "r") or die("Unable to open file!:" . $file_name);
+
+        //Read File 
+        $information =  fread($myfile,filesize($file_name));
+        //Close file
+        fclose($myfile);
+
+
+        return $information;
+    } catch (Exception $e) {
+        throw new Exception( $e->getMessage());
+    }
+
+}
+
+
+function write_in_file($file_name,$text){
+
+    try {
+
+        $myfile = fopen($file_name, "w") or die("Unable to open file!:" . $file_name);
+        fwrite($myfile, $text);
+        fclose($myfile);
+
+        return true;
+
+    } catch (Exception $e) {
+        throw new Exception( $e->getMessage());
+    }
+
+}
+
+
+function test_file_existing($file_name){
+
+    if (file_exists($file_name)) {
+       return true;
+    } else {
+       return false;
+    }
+
+}
+
+
+
+
+function secure_file($file_path){
+    try {
+        chmod($file_path, 0600);
+    } catch (Exception $e) {
+        throw new Exception( "WARNING: The program was not able to secure the " . $file_path . " Errordetails:" . $e->getMessage());
+    }
+    }
+
+
+
+?>
\ No newline at end of file
diff --git a/api/external_ping_api/key.config b/api/external_ping_api/key.config
new file mode 100644
index 00000000..d1a86c18
--- /dev/null
+++ b/api/external_ping_api/key.config
@@ -0,0 +1 @@
+WTn9cYxz5PWadaVqEdki0FwhmLkjje5RXgDVTAlWdq3Uvv5hR1i0TI1AFN7Z
\ No newline at end of file
diff --git a/api/external_ping_api/keyit.php b/api/external_ping_api/keyit.php
new file mode 100644
index 00000000..8e4a0feb
--- /dev/null
+++ b/api/external_ping_api/keyit.php
@@ -0,0 +1,191 @@
+<?php
+/*
+Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/ 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
+THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+echo "<!-- Copyright (c) CS-Digital UG (hatungsbeschränkt) https://cs-digital-ug.de/  -->";
+
+
+/*
+Identifier: sj3SjMAfJDRIK5YLWkcprM1gVYjgmZuUHK1bJ5Qa96m6ARkK5hMysb5ruC4oxXYjiWNcCuYvJ7mkSKRzMKNXdiFLeoY2Wn1jYTNAGqXoqBYyu1eFrvWm3Pj7y7soMwULKDxQYiKZTs43xPDiPmVjhM
+Date: 03.12.2020
+*/
+echo "<!-- Identifier: sj3SjMAfJDRIK5YLWkcprM1gVYjgmZuUHK1bJ5Qa96m6ARkK5hMysb5ruC4oxXYjiWNcCuYvJ7mkSKRzMKNXdiFLeoY2Wn1jYTNAGqXoqBYyu1eFrvWm3Pj7y7soMwULKDxQYiKZTs43xPDiPmVjhM -->";
+
+
+
+//Load options
+include_once("config.php");
+
+
+
+//check file exist
+if (file_exists($filename)) {
+
+
+    $key = $_GET[$key_name];
+
+    //open file and read it
+    $myfile = fopen($filename, "r") or die("keyit.php: 1 Unable to open file!");
+    $filekey =fread($myfile,filesize($filename));
+
+
+    if($key == $filekey)
+    {
+    //Right key
+
+    
+    //Check if  we need a new key (new key every 120 days)
+    
+    
+    
+        //check if it is more than x days
+    $lastmodified= filemtime($filename);
+    
+    
+        //whats now daytime
+        $datetime = new DateTime();
+        $datetime = $datetime->getTimestamp();
+    
+    
+    /*** if file is 24 hours (86400 seconds) old then delete it ***/
+    //8035200 sek ~3 monate
+    //5356800 sek ~ 2 Monate
+    //3456000 sek ~ 40 tage
+    //2678400 sek ~ 1 Monat
+    //1209600 sek ~ 14 Tage
+    //864000 sek ~ 10 tage
+    
+    
+    if( $lastmodified + ($option_newkeydays*(24*60*60)) <  $datetime){
+    //Its longer than x days, create new key
+    
+   
+    //generate new key
+    $newkey = createnewkeyfile($filename, $key_length );
+
+    //Send mail to recipients
+$mail_subject ="Key changing: " . date("Y.m.d H:i:s");;
+$mail_message="The key of the file " . getCurrentUrl() . " has changed to: " . $newkey;
+sendmailtorecipients($email_ricipiants_contacts,$mail_subject,$mail_message,false);
+    
+
+
+    }else{
+//Key is not old enought to get changed
+    }
+    
+    
+    
+    
+    }else{
+        //Wrong key
+        header('HTTP/1.0 403 Forbidden');
+        echo 'keyit.php: You are forbidden!';
+        exit;
+        die;
+    }
+
+
+
+
+
+}else{
+    //File does not exist
+    //Create it with key
+    $newkey = createnewkeyfile($filename,$key_length );
+
+    //Send mail to recipients
+$mail_subject ="Key created: " . date("Y.m.d H:i:s");;
+$mail_message="The key of the file " . getCurrentUrl() . " has created: " . $newkey;
+sendmailtorecipients($email_ricipiants_contacts,$mail_subject,$mail_message,false);
+
+}
+
+
+
+
+
+
+//Secure file agains reading
+securekeyfileagainstreading($filename);
+
+
+
+
+
+//Funktionen / Functions
+
+//###########################################################
+
+function generateRandomString($length = 10) {
+    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    $charactersLength = strlen($characters);
+    $randomString = '';
+    for ($i = 0; $i < $length; $i++) {
+        $randomString .= $characters[rand(0, $charactersLength - 1)];
+    }
+    return $randomString;
+}
+
+
+function writeinfile($filename,$text){
+    $myfile = fopen($filename, "w") or die("keyit.php: 2 Unable to open file!");
+    fwrite($myfile, $text);
+    fclose($myfile);
+}
+
+
+
+function createnewkeyfile($filename,  $key_length ){
+
+//create new key
+$newkey = generateRandomString($key_length);
+
+    //create new file and safe it
+    writeinfile($filename,$newkey);
+    //secure key file
+    securekeyfileagainstreading($filename);
+
+
+return $newkey;
+
+}
+
+function securekeyfileagainstreading($filename){
+    chmod($filename, 0600);
+}
+
+
+function sendmailtorecipients($contacts_array,$subject,$message,$output=false){
+// $contacts array
+//   $contacts = array("youremailaddress@yourdomain.com","youremailaddress@yourdomain.com");
+//....as many email address as you need
+ 
+        foreach($contacts_array as $contact) {
+        
+        $to      =  $contact;
+        mail($to, $subject, $message);
+
+        //Outpu of sending message
+        if($output == true){
+            echo "keyit.php: Send mail to " . $to . "with the subject " . $subject . " and the text " . $message . "... <br>";
+        }
+        
+        }
+
+
+}
+
+
+    function getCurrentUrl() {
+        return ((empty($_SERVER['HTTPS'])) ? 'http' : 'https') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
+    }
+
+?>
\ No newline at end of file