diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6e3ac62
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.vscode
+.ftpignore
+
+/config/app.php
+/database/yggstate.mwb.bak
\ No newline at end of file
diff --git a/config/app.php.example b/config/app.php.example
new file mode 100644
index 0000000..8eca5da
--- /dev/null
+++ b/config/app.php.example
@@ -0,0 +1,54 @@
+<?php
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 YGGverse
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * 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.
+ *
+ * Default configuration file example
+ * Production name: app.php
+ *
+ * Project home page
+ * https://github.com/YGGverse/YGGstate
+ *
+ * Get support
+ * https://github.com/YGGverse/YGGstate/issues
+*/
+
+// Debug
+ini_set('display_errors', '1');
+ini_set('display_startup_errors', '1');
+error_reporting(E_ALL);
+
+// Database
+define('DB_HOST', 'localhost');
+define('DB_PORT', 3306);
+define('DB_NAME', '');
+define('DB_USERNAME', '');
+define('DB_PASSWORD', '');
+
+// Crawler
+
+/*
+ * Stop crawler on disk quota reached
+ *
+ */
+define('CRAWL_STOP_DISK_QUOTA_MB_LEFT', 128);
\ No newline at end of file
diff --git a/crontab/crawler.php b/crontab/crawler.php
new file mode 100644
index 0000000..da15e74
--- /dev/null
+++ b/crontab/crawler.php
@@ -0,0 +1,156 @@
+<?php
+
+// Stop crawler on cli running
+$semaphore = sem_get(crc32('yggstate.cli.yggstate'), 1);
+
+if (false === sem_acquire($semaphore, true)) {
+
+  exit (PHP_EOL . 'yggstate.cli.yggstate process running in another thread.' . PHP_EOL);
+}
+
+// Lock multi-thread execution
+$semaphore = sem_get(crc32('yggstate.crontab.crawler'), 1);
+
+if (false === sem_acquire($semaphore, true)) {
+
+  exit (PHP_EOL . 'yggstate.crontab.crawler process locked by another thread.' . PHP_EOL);
+}
+
+// Load system dependencies
+require_once(__DIR__ . '/../config/app.php');
+require_once(__DIR__ . '/../library/yggdrasil.php');
+require_once(__DIR__ . '/../library/mysql.php');
+require_once(__DIR__ . '/../library/url.php');
+
+// Check disk quota
+if (CRAWL_STOP_DISK_QUOTA_MB_LEFT > disk_free_space('/') / 1000000) {
+
+  exit (PHP_EOL . 'Disk quota reached.' . PHP_EOL);
+}
+
+// Init Debug
+$debug = [
+  'time' => [
+    'ISO8601' => date('c'),
+    'total'   => microtime(true),
+  ],
+  'yggdrasil' => [
+    'peer' => [
+      'total' => [
+        'online' => 0,
+        'insert' => 0,
+      ],
+      'remote' => [
+        'total' => [
+          'insert' => 0,
+          'update' => 0,
+        ]
+      ]
+    ]
+  ]
+];
+
+// Connect database
+try {
+
+  $db = new MySQL(DB_HOST, DB_PORT, DB_NAME, DB_USERNAME, DB_PASSWORD);
+
+} catch(Exception $e) {
+
+  var_dump($e);
+
+  exit;
+}
+
+// Collect connected peers
+if ($connectedPeers = Yggdrasil::getPeers()) {
+
+  foreach ($connectedPeers as $connectedPeerAddress => $connectedPeerInfo) {
+
+    try {
+
+      $db->beginTransaction();
+
+      if ($dbPeer = $db->findPeer($connectedPeerAddress)) {
+
+        $dbPeerId = $dbPeer->peerId;
+
+      } else {
+
+        $dbPeerId = $db->addPeer($connectedPeerAddress, $connectedPeerInfo->key, time());
+
+        if ($connectedPeerRemoteUrl = URL::parse($connectedPeerInfo->remote)) {
+
+          if ($dbPeerRemote = $db->findPeerRemote($dbPeerId,
+                                                  $connectedPeerRemoteUrl->host->scheme,
+                                                  $connectedPeerRemoteUrl->host->name,
+                                                  $connectedPeerRemoteUrl->host->port)) {
+
+            // Update connection stats
+            if ($dbPeerRemote->received < $connectedPeerInfo->bytes_recvd) {
+
+              $debug['yggdrasil']['peer']['remote']['total']['update'] +=
+              $db->updatePeerRemoteReceived($dbPeerRemote->dbPeerRemoteId, $connectedPeerInfo->bytes_recvd, time());
+
+            }
+
+            if ($dbPeerRemote->sent < $connectedPeerInfo->bytes_sent) {
+
+              $debug['yggdrasil']['peer']['remote']['total']['update'] +=
+              $db->updatePeerRemoteSent($dbPeerRemote->dbPeerRemoteId, $connectedPeerInfo->bytes_sent, time());
+            }
+
+            if ($dbPeerRemote->uptime < $connectedPeerInfo->uptime) {
+
+              $debug['yggdrasil']['peer']['remote']['total']['update'] +=
+              $db->updatePeerRemoteUptime($dbPeerRemote->dbPeerRemoteId, $connectedPeerInfo->uptime, time());
+            }
+
+          } else {
+
+            $peerRemoteId = $db->addPeerRemote($dbPeerId,
+                                               $connectedPeerRemoteUrl->host->scheme,
+                                               $connectedPeerRemoteUrl->host->name,
+                                               $connectedPeerRemoteUrl->host->port,
+                                               $connectedPeerInfo->bytes_recvd,
+                                               $connectedPeerInfo->bytes_sent,
+                                               $connectedPeerInfo->uptime,
+                                               time());
+
+            $debug['yggdrasil']['peer']['remote']['total']['insert']++;
+          }
+        }
+
+        $debug['yggdrasil']['peer']['total']['insert']++;
+      }
+
+      $debug['yggdrasil']['peer']['total']['online']++;
+
+      $db->commit();
+
+    } catch(Exception $e) {
+
+      $db->rollBack();
+
+      var_dump($e);
+
+      break;
+    }
+  }
+}
+
+// Debug output
+$debug['time']['total'] = microtime(true) - $debug['time']['total'];
+
+print_r(
+  array_merge($debug, [
+    'db' => [
+      'total' => [
+        'select' => $db->getDebug()->query->select->total,
+        'insert' => $db->getDebug()->query->insert->total,
+        'update' => $db->getDebug()->query->update->total,
+        'delete' => $db->getDebug()->query->delete->total,
+      ]
+    ]
+  ])
+);
\ No newline at end of file
diff --git a/database/yggstate.mwb b/database/yggstate.mwb
new file mode 100644
index 0000000..a8e2d67
Binary files /dev/null and b/database/yggstate.mwb differ
diff --git a/library/mysql.php b/library/mysql.php
new file mode 100644
index 0000000..4f9fd7e
--- /dev/null
+++ b/library/mysql.php
@@ -0,0 +1,164 @@
+<?php
+
+class MySQL {
+
+  private PDO $_db;
+
+  private object $_debug;
+
+  public function __construct(string $host, int $port, string $database, string $username, string $password) {
+
+    $this->_db = new PDO('mysql:dbname=' . $database . ';host=' . $host . ';port=' . $port . ';charset=utf8', $username, $password, [PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']);
+    $this->_db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+    $this->_db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
+    $this->_db->setAttribute(PDO::ATTR_TIMEOUT, 600);
+
+    $this->_debug = (object)
+    [
+      'query' => (object)
+      [
+        'select' => (object)
+        [
+          'total' => 0
+        ],
+        'insert' => (object)
+        [
+          'total' => 0
+        ],
+        'update' => (object)
+        [
+          'total' => 0
+        ],
+        'delete' => (object)
+        [
+          'total' => 0
+        ],
+      ]
+    ];
+  }
+
+  // Tools
+  public function beginTransaction() {
+
+    $this->_db->beginTransaction();
+  }
+
+  public function commit() {
+
+    $this->_db->commit();
+  }
+
+  public function rollBack() {
+
+    $this->_db->rollBack();
+  }
+
+  public function getDebug() {
+
+    return $this->_debug;
+  }
+
+  // Peer
+  public function addPeer(string $address, string $key, int $timeAdded) {
+
+    $this->_debug->query->insert->total++;
+
+    $query = $this->_db->prepare('INSERT INTO `peer` SET `address` = ?, `key` = ?, `timeAdded` = ?');
+
+    $query->execute([$address, $key, $timeAdded]);
+
+    return $this->_db->lastInsertId();
+  }
+
+  public function findPeer(string $address) {
+
+    $this->_debug->query->select->total++;
+
+    $query = $this->_db->prepare('SELECT * FROM `peer` WHERE `address` = ? LIMIT 1');
+
+    $query->execute([$address]);
+
+    return $query->fetch();
+  }
+
+  public function getPeers() {
+
+    $this->_debug->query->select->total++;
+
+    $query = $this->_db->prepare('SELECT * FROM `peer`');
+
+    $query->execute();
+
+    return $query->fetchAll();
+  }
+
+  // Peer remote
+  public function addPeerRemote(int $peerId, string $scheme, string $host, int $port, int $received, int $sent, float $uptime, int $timeAdded) {
+
+    $this->_debug->query->insert->total++;
+
+    $query = $this->_db->prepare('INSERT INTO `peerRemote` SET  `peerId`    = ?,
+                                                                `scheme`    = ?,
+                                                                `host`      = ?,
+                                                                `port`      = ?,
+                                                                `received`  = ?,
+                                                                `sent`      = ?,
+                                                                `uptime`    = ?,
+                                                                `timeAdded` = ?');
+
+    $query->execute([$peerId, $scheme, $host, $port, $received, $sent, $uptime, $timeAdded]);
+
+    return $this->_db->lastInsertId();
+  }
+
+  public function updatePeerRemoteReceived(int $peerRemoteId, int $received, int $timeUpdated) {
+
+    $this->_debug->query->update->total++;
+
+    $query = $this->_db->prepare('UPDATE `peerRemote` SET `received` = ?, `timeUpdated` = ? WHERE `peerRemoteId` = ? LIMIT 1');
+
+    $query->execute([$received, $timeUpdated, $peerRemoteId]);
+
+    return $query->rowCount();
+  }
+
+  public function updatePeerRemoteSent(int $peerRemoteId, int $sent, int $timeUpdated) {
+
+    $this->_debug->query->update->total++;
+
+    $query = $this->_db->prepare('UPDATE `peerRemote` SET `sent` = ?, `timeUpdated` = ? WHERE `peerRemoteId` = ? LIMIT 1');
+
+    $query->execute([$sent, $timeUpdated, $peerRemoteId]);
+
+    return $query->rowCount();
+  }
+
+  public function updatePeerRemoteUptime(int $peerRemoteId, float $uptime, int $timeUpdated) {
+
+    $this->_debug->query->update->total++;
+
+    $query = $this->_db->prepare('UPDATE `peerRemote` SET `uptime` = ?, `timeUpdated` = ? WHERE `peerRemoteId` = ? LIMIT 1');
+
+    $query->execute([$uptime, $timeUpdated, $peerRemoteId]);
+
+    return $query->rowCount();
+  }
+
+  public function findPeerRemote(int $peerId, string $scheme, string $host, int $port) {
+
+    $this->_debug->query->select->total++;
+
+    $query = $this->_db->prepare('SELECT * FROM `peerRemote` WHERE `peerId` = ? AND `scheme` = ? AND `host` = ? AND `port` = ? LIMIT 1');
+
+    $query->execute([$peerId, $scheme, $host, $port]);
+
+    return $query->fetch();
+  }
+
+  // Other
+  public function optimize() {
+
+    $this->_db->query('OPTIMIZE TABLE `peer`');
+    $this->_db->query('OPTIMIZE TABLE `peerRemote`');
+  }
+}
diff --git a/library/url.php b/library/url.php
new file mode 100644
index 0000000..bada461
--- /dev/null
+++ b/library/url.php
@@ -0,0 +1,82 @@
+<?php
+
+class URL {
+
+  public static function is(string $url) : bool {
+
+    return filter_var($url, FILTER_VALIDATE_URL);
+  }
+
+  public static function parse(string $url) : mixed {
+
+    $result = (object)
+    [
+      'host' => (object)
+      [
+        'url'    => null,
+        'scheme' => null,
+        'name'   => null,
+        'port'   => null,
+      ],
+      'page' => (object)
+      [
+        'url'   => null,
+        'uri'   => null,
+        'path'  => null,
+        'query' => null,
+      ]
+    ];
+
+    // Validate URL
+    if (!self::is($url)) {
+
+      return false;
+    }
+
+    // Parse host
+    if ($scheme = parse_url($url, PHP_URL_SCHEME)) {
+
+      $result->host->url    = $scheme . '://';
+      $result->host->scheme = $scheme;
+
+    } else {
+
+      return false;
+    }
+
+    if ($host = parse_url($url, PHP_URL_HOST)) {
+
+      $result->host->url .= $host;
+      $result->host->name = $host;
+
+    } else {
+
+      return false;
+    }
+
+    if ($port = parse_url($url, PHP_URL_PORT)) {
+
+      $result->host->url .= ':' . $port;
+      $result->host->port = $port;
+
+      // port is optional
+    }
+
+    // Parse page
+    if ($path = parse_url($url, PHP_URL_PATH)) {
+
+      $result->page->uri  = $path;
+      $result->page->path = $path;
+    }
+
+    if ($query = parse_url($url, PHP_URL_QUERY)) {
+
+      $result->page->uri  .= '?' . $query;
+      $result->page->query = '?' . $query;
+    }
+
+    $result->page->url = $result->host->url . $result->page->uri;
+
+    return $result;
+  }
+}
\ No newline at end of file
diff --git a/library/yggdrasil.php b/library/yggdrasil.php
new file mode 100644
index 0000000..dd90f92
--- /dev/null
+++ b/library/yggdrasil.php
@@ -0,0 +1,55 @@
+<?php
+
+class Yggdrasil {
+
+  private static function _exec(string $cmd) : mixed {
+
+    if (false !== exec('yggdrasilctl -json getPeers', $output)) {
+
+      $rows = [];
+
+      foreach($output as $row){
+
+        $rows[] = $row;
+      }
+
+      if ($result = @json_decode(implode(PHP_EOL, $rows))) {
+
+        return $result;
+      }
+    }
+
+    return false;
+  }
+
+  public static function getPeers() : mixed {
+
+    if (false === $result = self::_exec('yggdrasilctl -json getPeers')) {
+
+      return false;
+    }
+
+    if (empty($result->peers)) {
+
+      return false;
+    }
+
+    foreach ((object) $result->peers as $peer) {
+
+      switch (false) {
+
+        case  isset($peer->bytes_recvd):
+        case  isset($peer->bytes_sent):
+        case  isset($peer->remote):
+        case  isset($peer->port):
+        case  isset($peer->key):
+        case  isset($peer->uptime):
+        case !empty($peer->coords):
+
+          return false;
+      }
+    }
+
+    return $result->peers;
+  }
+}
\ No newline at end of file
diff --git a/media/db-prototype.png b/media/db-prototype.png
new file mode 100644
index 0000000..0fce076
Binary files /dev/null and b/media/db-prototype.png differ
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..e69de29