diff --git a/admin/DashboardController.php b/admin/DashboardController.php
index 13a9455..33245c2 100644
--- a/admin/DashboardController.php
+++ b/admin/DashboardController.php
@@ -1750,8 +1750,42 @@ HTML;
       <button type="submit" class="btn-primary">Guardar configuración</button>
     </div>
   </form>
+
+  <div class="card" style="margin-top:16px">
+    <div class="card-h">Probar conexión IA</div>
+    <div class="card-b">
+      <div style="display:flex;align-items:center;gap:12px;flex-wrap:wrap">
+        <button type="button" class="btn-primary" onclick="testAiConn()" id="btnTestAi">Probar conexión</button>
+        <span id="aiTestResult" style="font-size:13px"></span>
+      </div>
+      <small style="margin-top:8px;color:#888">Guarda primero la configuración, luego prueba la conexión. Se enviará un mensaje de prueba al proveedor activo.</small>
+    </div>
+  </div>
+
   <div class="version-info">Los cambios se aplican inmediatamente. Los valores se almacenan en la base de datos.</div>
 </div>
+<script>
+function testAiConn() {
+  var btn = document.getElementById('btnTestAi');
+  var res = document.getElementById('aiTestResult');
+  btn.disabled = true;
+  res.textContent = 'Probando...';
+  res.style.color = '#666';
+  fetch('/admin/settings/test-ai', {method:'POST', headers:{'Content-Type':'application/x-www-form-urlencoded'}, body:''})
+    .then(function(r){return r.json();})
+    .then(function(d){
+      if (d.ok) {
+        res.textContent = 'Conexion exitosa (' + d.provider + '): ' + d.response;
+        res.style.color = '#16a34a';
+      } else {
+        res.textContent = 'Error (' + d.provider + '): ' + d.error;
+        res.style.color = '#dc2626';
+      }
+    })
+    .catch(function(e){ res.textContent = 'Error de red'; res.style.color = '#dc2626'; })
+    .finally(function(){ btn.disabled = false; });
+}
+</script>
 </body>
 </html>
 HTML;
diff --git a/public/index.php b/public/index.php
index f330e6b..1e17a4c 100644
--- a/public/index.php
+++ b/public/index.php
@@ -415,7 +415,7 @@ $routes = [
         $allowed = [
             'whatsapp_access_token', 'whatsapp_app_secret', 'whatsapp_verify_token',
             'whatsapp_business_account_id', 'whatsapp_default_phone_number_id',
-            'ai_provider', 'openai_api_key', 'openai_model', 'ai_max_tokens', 'ai_default_prompt',
+            'ai_provider', 'openai_api_key', 'openai_model', 'gemini_api_key', 'gemini_model', 'ai_max_tokens', 'ai_default_prompt',
             'verify_hmac_signature',
         ];
         // Checkbox: si no está presente, desactivar
@@ -443,6 +443,37 @@ $routes = [
         exit;
     })()],
 
+    ['POST', '/admin/settings/test-ai', fn() => (function () {
+        SessionAuth::require();
+        $provider = Settings::get('ai_provider', 'mock');
+        if ($provider === 'gemini') {
+            $apiKey = Settings::get('gemini_api_key', '');
+            $model  = Settings::get('gemini_model', 'gemini-2.0-flash');
+            if ($apiKey === '') { jsonResponse(200, ['ok' => false, 'provider' => 'gemini', 'error' => 'API Key no configurada. Guarda primero.']); return; }
+            $url     = "https://generativelanguage.googleapis.com/v1beta/models/{$model}:generateContent?key={$apiKey}";
+            $payload = json_encode(['contents' => [['role' => 'user', 'parts' => [['text' => 'Responde solo: OK']]]]]);
+            $ch = curl_init($url);
+            curl_setopt_array($ch, [CURLOPT_POST => true, CURLOPT_POSTFIELDS => $payload, CURLOPT_HTTPHEADER => ['Content-Type: application/json'], CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 15]);
+            $resp = curl_exec($ch); $code = curl_getinfo($ch, CURLINFO_HTTP_CODE); $err = curl_error($ch); curl_close($ch);
+            if ($code !== 200) { $msg = $err ?: (json_decode($resp, true)['error']['message'] ?? "HTTP {$code}"); jsonResponse(200, ['ok' => false, 'provider' => 'gemini', 'error' => $msg]); return; }
+            $text = json_decode($resp, true)['candidates'][0]['content']['parts'][0]['text'] ?? '(sin respuesta)';
+            jsonResponse(200, ['ok' => true, 'provider' => 'gemini', 'response' => trim($text)]);
+        } elseif ($provider === 'openai') {
+            $apiKey = Settings::get('openai_api_key', '');
+            $model  = Settings::get('openai_model', 'gpt-4o-mini');
+            if ($apiKey === '') { jsonResponse(200, ['ok' => false, 'provider' => 'openai', 'error' => 'API Key no configurada. Guarda primero.']); return; }
+            $payload = json_encode(['model' => $model, 'messages' => [['role' => 'user', 'content' => 'Responde solo: OK']], 'max_tokens' => 5]);
+            $ch = curl_init('https://api.openai.com/v1/chat/completions');
+            curl_setopt_array($ch, [CURLOPT_POST => true, CURLOPT_POSTFIELDS => $payload, CURLOPT_HTTPHEADER => ['Content-Type: application/json', 'Authorization: Bearer ' . $apiKey], CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 15]);
+            $resp = curl_exec($ch); $code = curl_getinfo($ch, CURLINFO_HTTP_CODE); $err = curl_error($ch); curl_close($ch);
+            if ($code !== 200) { $msg = $err ?: (json_decode($resp, true)['error']['message'] ?? "HTTP {$code}"); jsonResponse(200, ['ok' => false, 'provider' => 'openai', 'error' => $msg]); return; }
+            $text = json_decode($resp, true)['choices'][0]['message']['content'] ?? '(sin respuesta)';
+            jsonResponse(200, ['ok' => true, 'provider' => 'openai', 'response' => trim($text)]);
+        } else {
+            jsonResponse(200, ['ok' => true, 'provider' => 'mock', 'response' => 'Mock activo — no hay proveedor real configurado.']);
+        }
+    })()],
+
     // ─── Debug: captura cruda de webhooks (loguea todo sin validar) ───────
     ['GET', '/admin/v1/wp-webhook-debug', fn() => (function () {
         $log = '[' . date('Y-m-d H:i:s') . "] GET " . ($_SERVER['QUERY_STRING'] ?? '') . "\n";