diff --git a/main.go b/main.go
index e3c520e..58e36d7 100644
--- a/main.go
+++ b/main.go
@@ -71,6 +71,7 @@ func main() {
 	}
 
 	// Server
+	http.HandleFunc("/", handleGUI)
 	http.HandleFunc("/whitelist", handleWhitelist)
 	http.HandleFunc("/check/", handleCheck)
 	http.Handle("/metrics", promhttp.Handler())
@@ -223,7 +224,13 @@ func handleCheck(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "invalid IP", http.StatusBadRequest)
 		return
 	}
-	cats := []string{"firehol", "bitwire", "RU", "CN"}
+
+	var cats []string
+	for a, _ := range blocklistURLs {
+		cats = append(cats, a)
+	}
+
+	//cats := []string{"firehol", "bitwire", "RU", "CN"}
 	matches, err := checkIP(ip, cats)
 	if err != nil {
 		http.Error(w, "server error", http.StatusInternalServerError)
@@ -303,3 +310,95 @@ func writeJSON(w http.ResponseWriter, v any) {
 	w.Header().Set("Content-Type", "application/json")
 	_ = json.NewEncoder(w).Encode(v)
 }
+
+func handleGUI(w http.ResponseWriter, r *http.Request) {
+	html := `
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>IP Checker GUI</title>
+  <style>
+    body { font-family: sans-serif; max-width: 600px; margin: auto; padding: 2em; background: #f9fafb; }
+    h1 { font-size: 1.5em; margin-bottom: 1em; }
+    input, button { padding: 0.7em; margin: 0.3em 0; width: 100%; border-radius: 0.4em; border: 1px solid #ccc; }
+    button { background: #2563eb; color: white; border: none; cursor: pointer; }
+    button:hover { background: #1d4ed8; }
+    #result, #metrics, #history { background: white; border: 1px solid #ddd; padding: 1em; border-radius: 0.4em; margin-top: 1em; white-space: pre-wrap; }
+  </style>
+</head>
+<body>
+  <h1>IP Checker + Whitelist GUI</h1>
+  <input id="ipInput" type="text" placeholder="Enter IP-Address...">
+  <button onclick="checkIP()">Check IP</button>
+  <button onclick="whitelistIP()">Whitelist IP</button>
+
+  <h2>Ergebnis</h2>
+  <div id="result">No Request</div>
+
+  <h2>Prometheus Metrics</h2>
+  <div id="metrics">Loading...</div>
+
+  <h2>Check History</h2>
+  <div id="history">No history</div>
+
+  <script>
+    async function checkIP() {
+      const ip = document.getElementById('ipInput').value.trim();
+      if (!ip) { alert("Please enter IP!"); return; }
+      const res = await fetch('/check/' + ip);
+      const data = await res.json();
+      document.getElementById('result').innerText = JSON.stringify(data, null, 2);
+      addHistory(ip, data);
+    }
+
+    async function whitelistIP() {
+      const ip = document.getElementById('ipInput').value.trim();
+      if (!ip) { alert("Please enter IP!"); return; }
+      const res = await fetch('/whitelist', {
+        method: 'POST',
+        headers: {'Content-Type': 'application/json'},
+        body: JSON.stringify({ip})
+      });
+      const data = await res.json();
+      document.getElementById('result').innerText = JSON.stringify(data, null, 2);
+      addHistory(ip, data);
+    }
+
+    function addHistory(ip, data) {
+      let history = JSON.parse(localStorage.getItem('ipHistory') || '[]');
+      history.unshift({ip, data, ts: new Date().toLocaleString()});
+      if (history.length > 10) history = history.slice(0, 10);
+      localStorage.setItem('ipHistory', JSON.stringify(history));
+      renderHistory();
+    }
+
+    function renderHistory() {
+      let history = JSON.parse(localStorage.getItem('ipHistory') || '[]');
+      if (history.length === 0) {
+        document.getElementById('history').innerText = 'Nothing checked yet';
+        return;
+      }
+      document.getElementById('history').innerText = history.map(e => 
+        e.ts + ": " + e.ip + " → blocked=" + (e.data.blocked ? "yes" : "no") +
+        (e.data.categories ? " [" + e.data.categories.join(", ") + "]" : "")
+      ).join("\n");
+    }
+
+    async function loadMetrics() {
+      const res = await fetch('/metrics');
+      const text = await res.text();
+      const lines = text.split('\n').filter(l => l.includes('ipcheck_'));
+      document.getElementById('metrics').innerText = lines.join('\n') || 'No Data';
+    }
+
+    renderHistory();
+    setInterval(loadMetrics, 3000);
+    loadMetrics();
+  </script>
+</body>
+</html>
+`
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	_, _ = w.Write([]byte(html))
+}
