diff --git a/socket_basics/core/notification/webhook_notifier.py b/socket_basics/core/notification/webhook_notifier.py
index 6180944..a5a5279 100644
--- a/socket_basics/core/notification/webhook_notifier.py
+++ b/socket_basics/core/notification/webhook_notifier.py
@@ -19,7 +19,7 @@ def __init__(self, params: Dict[str, Any] | None = None):
         super().__init__(params or {})
         # Webhook URL from params, env variable, or app config
         self.url = (
-            self.config.get('url') or
+            self.config.get('webhook_url') or
             get_webhook_url()
         )
 
diff --git a/tests/test_webhook_notifier_params.py b/tests/test_webhook_notifier_params.py
new file mode 100644
index 0000000..996f105
--- /dev/null
+++ b/tests/test_webhook_notifier_params.py
@@ -0,0 +1,87 @@
+import os
+
+from socket_basics.core.notification.webhook_notifier import WebhookNotifier
+from socket_basics.core.notification.manager import NotificationManager
+
+
+def _base_cfg():
+    return {
+        "notifiers": {
+            "webhook": {
+                "module_path": "socket_basics.core.notification.webhook_notifier",
+                "class": "WebhookNotifier",
+                "parameters": [
+                    {"name": "webhook_url", "env_variable": "INPUT_WEBHOOK_URL", "type": "str"},
+                ],
+            }
+        }
+    }
+
+
+def test_webhook_notifier_reads_url_from_params():
+    """webhook_url param from dashboard config should populate self.url"""
+    n = WebhookNotifier({"webhook_url": "https://hooks.example.com/endpoint"})
+    assert n.url == "https://hooks.example.com/endpoint"
+
+
+def test_webhook_notifier_url_is_none_without_config(monkeypatch):
+    """Without any config or env var, url should be falsy"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.delenv("INPUT_WEBHOOK_URL", raising=False)
+    n = WebhookNotifier({})
+    assert not n.url
+
+
+def test_webhook_notifier_falls_back_to_env_var(monkeypatch):
+    """INPUT_WEBHOOK_URL env var should work as fallback when params empty"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.setenv("INPUT_WEBHOOK_URL", "https://env.example.com/hook")
+    n = WebhookNotifier({})
+    assert n.url == "https://env.example.com/hook"
+
+
+def test_webhook_notifier_params_take_precedence_over_env(monkeypatch):
+    """Dashboard config (params) should take precedence over env var"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.setenv("INPUT_WEBHOOK_URL", "https://env.example.com/hook")
+    n = WebhookNotifier({"webhook_url": "https://dashboard.example.com/hook"})
+    assert n.url == "https://dashboard.example.com/hook"
+
+
+def test_webhook_enabled_via_app_config(monkeypatch):
+    """Webhook notifier should load when webhook_url is in app_config (dashboard)"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.delenv("INPUT_WEBHOOK_URL", raising=False)
+
+    cfg = _base_cfg()
+    nm = NotificationManager(cfg, app_config={"webhook_url": "https://app.example.com/hook"})
+    nm.load_from_config()
+
+    webhook = next(n for n in nm.notifiers if getattr(n, "name", "") == "webhook")
+    assert webhook.url == "https://app.example.com/hook"
+
+
+def test_webhook_enabled_via_env_var(monkeypatch):
+    """Webhook notifier should load when INPUT_WEBHOOK_URL env var is set"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.setenv("INPUT_WEBHOOK_URL", "https://env.example.com/hook")
+
+    cfg = _base_cfg()
+    nm = NotificationManager(cfg, app_config={})
+    nm.load_from_config()
+
+    webhook = next(n for n in nm.notifiers if getattr(n, "name", "") == "webhook")
+    assert webhook.url == "https://env.example.com/hook"
+
+
+def test_webhook_app_config_precedence_over_env(monkeypatch):
+    """app_config webhook_url should take precedence over env var in manager flow"""
+    monkeypatch.delenv("WEBHOOK_URL", raising=False)
+    monkeypatch.setenv("INPUT_WEBHOOK_URL", "https://env.example.com/hook")
+
+    cfg = _base_cfg()
+    nm = NotificationManager(cfg, app_config={"webhook_url": "https://dashboard.example.com/hook"})
+    nm.load_from_config()
+
+    webhook = next(n for n in nm.notifiers if getattr(n, "name", "") == "webhook")
+    assert webhook.url == "https://dashboard.example.com/hook"