diff --git a/hc/front/tests/test_metrics.py b/hc/front/tests/test_metrics.py
index 27204285..d9706960 100644
--- a/hc/front/tests/test_metrics.py
+++ b/hc/front/tests/test_metrics.py
@@ -13,7 +13,7 @@ class MetricsTestCase(BaseTestCase):
         self.check.save()
 
         key = "R" * 32
-        self.url = "/projects/%s/checks/metrics/?api_key=%s" % (self.project.code, key)
+        self.url = "/projects/%s/checks/metrics/%s" % (self.project.code, key)
 
     def test_it_works(self):
         r = self.client.get(self.url)
@@ -38,6 +38,6 @@ class MetricsTestCase(BaseTestCase):
         self.assertEqual(r.status_code, 400)
 
     def test_it_checks_api_key(self):
-        url = "/projects/%s/checks/metrics/?api_key=%s" % (self.project.code, "X" * 32)
+        url = "/projects/%s/checks/metrics/%s" % (self.project.code, "X" * 32)
         r = self.client.get(url)
         self.assertEqual(r.status_code, 403)
diff --git a/hc/front/urls.py b/hc/front/urls.py
index 84203970..21511b42 100644
--- a/hc/front/urls.py
+++ b/hc/front/urls.py
@@ -70,7 +70,11 @@ urlpatterns = [
     path("projects/<uuid:code>/checks/add/", views.add_check, name="hc-add-check"),
     path("checks/cron_preview/", views.cron_preview),
     path("projects/<uuid:code>/checks/status/", views.status, name="hc-status"),
-    path("projects/<uuid:code>/checks/metrics/", views.metrics, name="hc-metrics"),
+    path(
+        "projects/<uuid:code>/checks/metrics/<slug:key>",
+        views.metrics,
+        name="hc-metrics",
+    ),
     path("checks/<uuid:code>/", include(check_urls)),
     path("integrations/", include(channel_urls)),
     path("docs/", views.serve_doc, name="hc-docs"),
diff --git a/hc/front/views.py b/hc/front/views.py
index 2271773f..dbfff65e 100644
--- a/hc/front/views.py
+++ b/hc/front/views.py
@@ -1542,12 +1542,11 @@ def add_msteams(request):
     return render(request, "integrations/add_msteams.html", ctx)
 
 
-def metrics(request, code):
-    api_key = request.GET.get("api_key", "")
-    if len(api_key) != 32:
+def metrics(request, code, key):
+    if len(key) != 32:
         return HttpResponseBadRequest()
 
-    q = Project.objects.filter(code=code, api_key_readonly=api_key)
+    q = Project.objects.filter(code=code, api_key_readonly=key)
     try:
         project = q.get()
     except Project.DoesNotExist:
diff --git a/templates/accounts/project.html b/templates/accounts/project.html
index 75d325a2..1eaa99df 100644
--- a/templates/accounts/project.html
+++ b/templates/accounts/project.html
@@ -45,7 +45,7 @@
                         </p>
                         <p>
                             Prometheus metrics endpoint:
-                            <a href="{% url 'hc-metrics' project.code %}?api_key={{ project.api_key_readonly }}">here</a>
+                            <a href="{% url 'hc-metrics' project.code project.api_key_readonly %}">here</a>
                         </p>
                         {% endif %}
                         <button