diff --git a/custom_components/whatsapp_bridge_integration/services.py b/custom_components/whatsapp_bridge_integration/services.py
new file mode 100644
index 0000000..7a8e159
--- /dev/null
+++ b/custom_components/whatsapp_bridge_integration/services.py
@@ -0,0 +1,43 @@
+import requests
+import logging
+from homeassistant.core import HomeAssistant, ServiceCall
+from .const import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+async def async_setup_services(hass: HomeAssistant):
+    async def handle_send_message(call: ServiceCall):
+        message = call.data.get("message")
+        target_entity = call.data.get("recipient")
+        
+        targets = []
+
+        # 1. Fall: Broadcast an alle
+        if target_entity == "all":
+            entities = hass.states.async_all("sensor")
+            for entity in entities:
+                if entity.entity_id.startswith("sensor.whatsapp_"):
+                    targets.append(entity.attributes.get("phone_number"))
+        
+        # 2. Fall: Einzelne Entity ausgewählt
+        else:
+            state = hass.states.get(target_entity)
+            if state:
+                num = state.attributes.get("phone_number")
+                if num:
+                    targets.append(num)
+            else:
+                # Fallback für manuelle Eingabe in YAML
+                targets.append(target_entity)
+
+        for num in targets:
+            url = "http://866fd2eb-whatsapp-bridge:3000/send"
+            try:
+                await hass.async_add_executor_job(
+                    lambda: requests.post(url, json={"number": num, "message": message}, timeout=10)
+                )
+                _LOGGER.info("Sent to %s", num)
+            except Exception as e:
+                _LOGGER.error("Error: %s", str(e))
+
+    hass.services.async_register(DOMAIN, "send_message", handle_send_message)
\ No newline at end of file