diff --git a/consumer_api/app.py b/consumer_api/app.py
index a1ceecf..dbedea3 100644
--- a/consumer_api/app.py
+++ b/consumer_api/app.py
@@ -18,6 +18,7 @@ sentry_sdk.init("https://0a106e104e114bc9a3fa47f9cb0db2f4@sentry.kmlabz.com/10")
 
 app = Flask(__name__)
 app.config['REDIS_URL'] = os.environ['REDIS_URL']
+app.config['LOCAL_UUID'] = os.environ['LOCAL_UUID']
 
 redis_client.init_app(app)
 
diff --git a/consumer_api/views/consumers_view.py b/consumer_api/views/consumers_view.py
index feb59ef..0582bc4 100644
--- a/consumer_api/views/consumers_view.py
+++ b/consumer_api/views/consumers_view.py
@@ -1,7 +1,13 @@
+import json
+
+from db import redis_client
+from flask import jsonify, current_app
 from flask_classful import FlaskView
 
 
 class ConsumersView(FlaskView):
 
     def get(self):
-        return "ConsumersView"
+        consumer_list = json.loads((redis_client.get("consumer_list") or b"{}").decode('utf-8'))
+        current_app.logger.warning(jsonify([v['ip'] for k, v in consumer_list.items()]))
+        return jsonify([v['ip'] for k, v in consumer_list.items()])
diff --git a/consumer_api/views/log_view.py b/consumer_api/views/log_view.py
index fc589f4..abfff93 100644
--- a/consumer_api/views/log_view.py
+++ b/consumer_api/views/log_view.py
@@ -1,7 +1,9 @@
+from flask import request, current_app, Response
 from flask_classful import FlaskView
 
 
 class LogView(FlaskView):
 
-    def get(self):
-        return "LogView"
\ No newline at end of file
+    def post(self):
+        current_app.logger.info(f"New message: {request.json['message']}")
+        return Response(status = 204)
diff --git a/consumer_api/views/sync_view.py b/consumer_api/views/sync_view.py
index 6f17796..a6f8eb5 100644
--- a/consumer_api/views/sync_view.py
+++ b/consumer_api/views/sync_view.py
@@ -1,7 +1,32 @@
+import json
+from flask import request, current_app, jsonify
 from flask_classful import FlaskView
+from db import redis_client  # ez nagyon otvar
 
 
 class SyncView(FlaskView):
 
-    def get(self):
-        return "SyncView"
+    def post(self):
+        remote_uuid = request.json['uuid']
+        remote_ip = request.remote_addr
+
+        consumer_list = json.loads((redis_client.get("consumer_list") or b"{}").decode('utf-8'))
+
+        # Log something about it
+        if remote_uuid not in consumer_list.keys():
+            current_app.logger.info(f"New consumer registered (unknown UUID): {remote_uuid} at {remote_ip}")
+        else:  # known
+            if consumer_list[remote_uuid]['ip'] != remote_ip:
+                current_app.logger.info(f"Address of consumer {remote_uuid} changed to {remote_ip}")
+
+        consumer_list.update(
+            {remote_uuid: {"ip": remote_ip}}
+        )
+
+        redis_client.set("consumer_list", json.dumps(consumer_list).encode('utf-8'))
+
+        response = {
+            "uuid": current_app.config['LOCAL_UUID']
+        }
+
+        return jsonify(response)