diff --git a/debug_scheduled_api.php b/debug_scheduled_api.php
new file mode 100644
index 0000000..b92817d
--- /dev/null
+++ b/debug_scheduled_api.php
@@ -0,0 +1,95 @@
+<?php
+/**
+ * Debug: Ver datos crudos del API de mensajes programados
+ */
+
+require_once __DIR__ . '/config/config.php';
+
+header('Content-Type: text/plain; charset=utf-8');
+
+echo "=== DEBUG API get_scheduled_messages.php ===\n\n";
+
+try {
+    $db = Database::getInstance();
+    
+    // Obtener mensajes enviados recientes
+    $messages = $db->fetchAll(
+        "SELECT sm.*, 
+                u.name as user_name,
+                u.phone_number,
+                mt.name as template_display_name,
+                mt.body_text as template_body
+         FROM scheduled_messages sm
+         LEFT JOIN users u ON sm.user_id = u.id
+         LEFT JOIN message_templates mt ON sm.template_id = mt.id
+         WHERE sm.status = 'sent'
+         ORDER BY sm.sent_at DESC
+         LIMIT 5"
+    );
+    
+    if (empty($messages)) {
+        echo "❌ No hay mensajes enviados\n";
+        exit;
+    }
+    
+    echo "Encontrados " . count($messages) . " mensajes enviados:\n\n";
+    
+    foreach ($messages as $i => $msg) {
+        echo "========== MENSAJE #" . ($i + 1) . " (ID: {$msg['id']}) ==========\n";
+        echo "Usuario: {$msg['user_name']} ({$msg['phone_number']})\n";
+        echo "Plantilla: {$msg['template_name']}\n";
+        echo "Estado: {$msg['status']}\n";
+        echo "Enviado: {$msg['sent_at']}\n\n";
+        
+        echo "📝 TEMPLATE BODY:\n";
+        echo $msg['template_body'] . "\n\n";
+        
+        echo "📊 TEMPLATE_PARAMETERS (raw string):\n";
+        echo $msg['template_parameters'] . "\n\n";
+        
+        echo "🔍 TEMPLATE_PARAMETERS (decodificado):\n";
+        $params = json_decode($msg['template_parameters'], true);
+        
+        if (is_array($params)) {
+            echo "Tipo: array\n";
+            echo "Cantidad: " . count($params) . "\n";
+            
+            // Detectar si es asociativo
+            $isAssoc = false;
+            foreach ($params as $k => $v) {
+                if (!is_int($k)) {
+                    $isAssoc = true;
+                    break;
+                }
+            }
+            
+            echo "Formato: " . ($isAssoc ? "ASOCIATIVO" : "INDEXADO") . "\n\n";
+            
+            echo "Valores:\n";
+            foreach ($params as $k => $v) {
+                echo "  [$k] => '$v'\n";
+            }
+        } else {
+            echo "⚠️ No es un array válido\n";
+        }
+        
+        echo "\n";
+    }
+    
+    echo "\n\n=== SIMULACIÓN DE LO QUE VE EL FRONTEND ===\n\n";
+    
+    // Simular lo que hace get_scheduled_messages.php
+    $firstMsg = $messages[0];
+    
+    echo "JSON que recibe el frontend:\n";
+    
+    $msgForFrontend = $firstMsg;
+    if ($msgForFrontend['template_parameters']) {
+        $msgForFrontend['template_parameters'] = json_decode($msgForFrontend['template_parameters'], true);
+    }
+    
+    echo json_encode($msgForFrontend, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
+    
+} catch (Exception $e) {
+    echo "❌ Error: " . $e->getMessage() . "\n";
+}