diff --git a/mobile/lib/shared/community/community_provider.dart b/mobile/lib/shared/community/community_provider.dart
index 9cd24db0e8..f1e0cdef2b 100644
--- a/mobile/lib/shared/community/community_provider.dart
+++ b/mobile/lib/shared/community/community_provider.dart
@@ -130,7 +130,9 @@ Future<void> _deactivateCommunityPushLease(
   }
   final decoded = nostr.Nip19.decode(payload: nsec);
   final memberPubkey = community.pubkey ?? nostr.Keys(decoded.data).public;
-  final descriptor = await fetchBuzzPushLeaseDescriptor(community.relayUrl);
+  final descriptor = await fetchBuzzPushLeaseDescriptor(
+    canonicalBuzzPushRelayHttpUrl(community.relayUrl),
+  );
   final matchingGrant = (await readBuzzPushEndpointGrants())
       .where(
         (grant) =>
diff --git a/mobile/test/shared/community/push_opt_out_url_test.dart b/mobile/test/shared/community/push_opt_out_url_test.dart
new file mode 100644
index 0000000000..12d9b637a4
--- /dev/null
+++ b/mobile/test/shared/community/push_opt_out_url_test.dart
@@ -0,0 +1,56 @@
+import 'package:buzz/shared/community/community.dart';
+import 'package:buzz/shared/community/community_provider.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart';
+import 'package:nostr/nostr.dart' as nostr;
+
+void main() {
+  for (final scheme in ['ws', 'wss', 'http', 'https']) {
+    test(
+      'opt-out fetches relay metadata over HTTP for $scheme community',
+      () async {
+        final container = ProviderContainer();
+        addTearDown(container.dispose);
+        final community = Community.create(
+          name: 'Test',
+          relayUrl: '$scheme://relay.example:8443',
+          nsec: nostr.Keys.generate().nsec,
+        );
+        final requests = <http.Request>[];
+        final client = MockClient((request) async {
+          requests.add(request);
+          // Stop at the HTTP boundary, before native grants or publication.
+          return http.Response('test unavailable', 503);
+        });
+        addTearDown(client.close);
+
+        await http.runWithClient(() async {
+          await expectLater(
+            container.read(communityPushLeaseDeactivatorProvider)(
+              community,
+              generation: 2,
+            ),
+            throwsA(
+              isA<StateError>().having(
+                (error) => error.message,
+                'message',
+                contains('NIP-11 request failed with HTTP 503'),
+              ),
+            ),
+          );
+        }, () => client);
+
+        final httpScheme = scheme == 'ws' || scheme == 'http'
+            ? 'http'
+            : 'https';
+        expect(
+          requests.single.url,
+          Uri.parse('$httpScheme://relay.example:8443/'),
+        );
+        expect(requests.single.headers['Accept'], 'application/nostr+json');
+      },
+    );
+  }
+}