diff --git a/src/discovery.rs b/src/discovery.rs
new file mode 100644
index 0000000..691e0ff
--- /dev/null
+++ b/src/discovery.rs
@@ -0,0 +1,226 @@
+/// Módulo para descubrir servicios systemd existentes
+use std::fs;
+use std::path::Path;
+use crate::logger::get_logger;
+use crate::config::{get_config_manager, MonitoredApp};
+
+const SYSTEMD_DIR: &str = "/etc/systemd/system";
+const SERVICE_PREFIX: &str = "siax-app-";
+
+/// Descubre servicios systemd existentes con prefijo siax-app-*
+pub fn discover_services() -> Vec<DiscoveredService> {
+    let logger = get_logger();
+    logger.info("Discovery", "Escaneando servicios systemd existentes...");
+
+    let mut services = Vec::new();
+
+    // Leer directorio de systemd
+    let entries = match fs::read_dir(SYSTEMD_DIR) {
+        Ok(entries) => entries,
+        Err(e) => {
+            logger.error("Discovery", "No se pudo leer directorio systemd", Some(&e.to_string()));
+            return services;
+        }
+    };
+
+    // Buscar archivos siax-app-*.service
+    for entry in entries.flatten() {
+        let path = entry.path();
+        if let Some(filename) = path.file_name() {
+            let filename_str = filename.to_string_lossy();
+
+            // Verificar que sea un archivo .service con nuestro prefijo
+            if filename_str.starts_with(SERVICE_PREFIX) && filename_str.ends_with(".service") {
+                logger.info("Discovery", &format!("Encontrado: {}", filename_str));
+
+                // Extraer nombre de la app
+                let app_name = extract_app_name(&filename_str);
+
+                // Leer configuración del servicio
+                if let Some(service) = parse_service_file(&path, &app_name) {
+                    services.push(service);
+                }
+            }
+        }
+    }
+
+    logger.info("Discovery", &format!("✅ Descubiertos {} servicios", services.len()));
+    services
+}
+
+/// Extrae el nombre de la app desde el nombre del archivo
+/// Ejemplo: "siax-app-IDEAS.service" -> "app_IDEAS"
+fn extract_app_name(filename: &str) -> String {
+    // Remover "siax-app-" del inicio y ".service" del final
+    filename
+        .trim_start_matches(SERVICE_PREFIX)
+        .trim_end_matches(".service")
+        .to_string()
+}
+
+/// Servicio descubierto en systemd
+#[derive(Debug, Clone)]
+pub struct DiscoveredService {
+    pub app_name: String,
+    pub service_file: String,
+    pub working_directory: Option<String>,
+    pub user: Option<String>,
+    pub exec_start: Option<String>,
+    pub port: Option<i32>,
+}
+
+/// Parsea un archivo .service para extraer configuración básica
+fn parse_service_file(path: &Path, app_name: &str) -> Option<DiscoveredService> {
+    let logger = get_logger();
+
+    let content = match fs::read_to_string(path) {
+        Ok(content) => content,
+        Err(e) => {
+            logger.error("Discovery", &format!("Error leyendo {}", path.display()), Some(&e.to_string()));
+            return None;
+        }
+    };
+
+    let mut service = DiscoveredService {
+        app_name: app_name.to_string(),
+        service_file: path.to_string_lossy().to_string(),
+        working_directory: None,
+        user: None,
+        exec_start: None,
+        port: None,
+    };
+
+    // Parsear líneas del archivo
+    for line in content.lines() {
+        let line = line.trim();
+
+        // WorkingDirectory
+        if line.starts_with("WorkingDirectory=") {
+            service.working_directory = Some(line.trim_start_matches("WorkingDirectory=").to_string());
+        }
+
+        // User
+        if line.starts_with("User=") {
+            service.user = Some(line.trim_start_matches("User=").to_string());
+        }
+
+        // ExecStart
+        if line.starts_with("ExecStart=") {
+            service.exec_start = Some(line.trim_start_matches("ExecStart=").to_string());
+        }
+
+        // Environment con PORT
+        if line.starts_with("Environment=") && line.contains("PORT") {
+            if let Some(port) = extract_port_from_env(line) {
+                service.port = Some(port);
+            }
+        }
+    }
+
+    logger.info("Discovery", &format!("  App: {}, User: {:?}, WorkDir: {:?}",
+        service.app_name,
+        service.user,
+        service.working_directory
+    ));
+
+    Some(service)
+}
+
+/// Extrae el puerto de una línea Environment
+/// Ejemplo: Environment="PORT=3000" -> Some(3000)
+fn extract_port_from_env(line: &str) -> Option<i32> {
+    // Buscar PORT=número
+    if let Some(start) = line.find("PORT=") {
+        let after_port = &line[start + 5..];
+        // Extraer números
+        let port_str: String = after_port.chars()
+            .take_while(|c| c.is_numeric())
+            .collect();
+
+        port_str.parse::<i32>().ok()
+    } else {
+        None
+    }
+}
+
+/// Sincroniza los servicios descubiertos con monitored_apps.json
+pub fn sync_discovered_services(services: Vec<DiscoveredService>) {
+    let logger = get_logger();
+    let config_manager = get_config_manager();
+
+    logger.info("Discovery", "Sincronizando servicios descubiertos con configuración...");
+
+    let mut added_count = 0;
+    let mut skipped_count = 0;
+
+    for service in services {
+        // Intentar detectar el puerto si no se encontró en Environment
+        let port = service.port.unwrap_or_else(|| {
+            // Intentar extraer del nombre o usar puerto por defecto
+            detect_port_from_name(&service.app_name)
+        });
+
+        // Verificar si ya existe en la configuración
+        let existing_apps = config_manager.get_apps();
+        let already_exists = existing_apps.iter().any(|app| app.name == service.app_name);
+
+        if already_exists {
+            logger.info("Discovery", &format!("⏭️  {} ya existe en configuración", service.app_name));
+            skipped_count += 1;
+            continue;
+        }
+
+        // Agregar a monitored_apps.json
+        logger.info("Discovery", &format!("➕ Agregando {} (puerto: {})", service.app_name, port));
+
+        match config_manager.add_app(service.app_name.clone(), port) {
+            Ok(_) => {
+                logger.info("Discovery", &format!("✅ {} agregado exitosamente", service.app_name));
+                added_count += 1;
+            }
+            Err(e) => {
+                logger.error("Discovery", &format!("Error agregando {}", service.app_name), Some(&e));
+            }
+        }
+    }
+
+    logger.info("Discovery", &format!("📊 Resumen: {} agregadas, {} ya existían", added_count, skipped_count));
+}
+
+/// Intenta detectar el puerto desde el nombre de la app
+/// Esto es un fallback simple si no se encuentra en el .service
+fn detect_port_from_name(app_name: &str) -> i32 {
+    // Algunos puertos conocidos por nombre
+    match app_name.to_lowercase().as_str() {
+        name if name.contains("tareas") => 3000,
+        name if name.contains("fidelizacion") => 3001,
+        name if name.contains("ideas") => 2000,
+        _ => 8080, // Puerto por defecto genérico
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_extract_app_name() {
+        assert_eq!(extract_app_name("siax-app-IDEAS.service"), "IDEAS");
+        assert_eq!(extract_app_name("siax-app-TAREAS.service"), "TAREAS");
+        assert_eq!(extract_app_name("siax-app-fidelizacion.service"), "fidelizacion");
+    }
+
+    #[test]
+    fn test_extract_port_from_env() {
+        assert_eq!(extract_port_from_env("Environment=PORT=3000"), Some(3000));
+        assert_eq!(extract_port_from_env("Environment=\"PORT=8080\""), Some(8080));
+        assert_eq!(extract_port_from_env("Environment=NODE_ENV=production"), None);
+    }
+
+    #[test]
+    fn test_detect_port_from_name() {
+        assert_eq!(detect_port_from_name("app_tareas"), 3000);
+        assert_eq!(detect_port_from_name("IDEAS"), 2000);
+        assert_eq!(detect_port_from_name("unknown_app"), 8080);
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 26d0f29..0e2a85e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,8 +6,10 @@ pub mod logger;
 pub mod config;
 pub mod monitor;
 pub mod interface;
+pub mod discovery;
 
 // Re-exportar solo lo necesario para evitar conflictos
 pub use models::{ServiceConfig, ManagedApp, AppStatus, ServiceStatus, AppType, RestartPolicy};
 pub use logger::{Logger, LogEntry, LogLevel, get_logger};
 pub use config::{ConfigManager, MonitoredApp, AppConfig, get_config_manager};
+pub use discovery::{discover_services, sync_discovered_services, DiscoveredService};
diff --git a/src/main.rs b/src/main.rs
index 52d59c1..533072f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,11 +6,13 @@ mod models;
 mod systemd;
 mod orchestrator;
 mod api;
+mod discovery;
 
 use logger::get_logger;
 use config::get_config_manager;
 use orchestrator::{AppManager, LifecycleManager};
 use api::{ApiState, WebSocketManager};
+use discovery::{discover_services, sync_discovered_services};
 use std::sync::Arc;
 use axum::{
     routing::{get, post, delete},
@@ -24,7 +26,14 @@ async fn main() {
     let logger = get_logger();
     logger.info("Sistema", "Iniciando SIAX Agent");
 
-    // Inicializar config manager
+    // 🔍 Descubrir servicios systemd existentes
+    logger.info("Sistema", "Escaneando servicios systemd existentes...");
+    let discovered = discover_services();
+    if !discovered.is_empty() {
+        sync_discovered_services(discovered);
+    }
+
+    // Inicializar config manager (ahora con servicios descubiertos)
     let config_manager = get_config_manager();
     let apps = config_manager.get_apps();
     println!("📋 Apps a monitorear: {:?}", apps);