diff --git a/api/src/Service/ActivityPubService.php b/api/src/Service/ActivityPubService.php
index 939d0844e..e76bbbe9f 100644
--- a/api/src/Service/ActivityPubService.php
+++ b/api/src/Service/ActivityPubService.php
@@ -25,6 +25,8 @@ public function actor(): array
             ],
             'id' => $this->id,
             'type' => 'Application',
+            'inbox' => $this->id . '/inbox',
+            'outbox' => $this->id . '/outbox',
             'preferredUsername' => $this->preferredUsername,
             'publicKey' => [
                 'id' => $this->id . '#main-key',
diff --git a/api/tests/Case/Action/ActivityPubActorActionTest.php b/api/tests/Case/Action/ActivityPubActorActionTest.php
index 526ff2900..b085ed098 100644
--- a/api/tests/Case/Action/ActivityPubActorActionTest.php
+++ b/api/tests/Case/Action/ActivityPubActorActionTest.php
@@ -33,6 +33,8 @@ public function testActor(): void
                         ],
                         'id' => 'https://example.com/actor',
                         'type' => 'Application',
+                        'inbox' => 'https://example.com/actor/inbox',
+                        'outbox' => 'https://example.com/actor/outbox',
                         'preferredUsername' => 'example.com',
                         'publicKey' => [
                             'id' => 'https://example.com/actor#main-key',
@@ -55,6 +57,8 @@ public function testActor(): void
             ],
             'id' => 'https://example.com/actor',
             'type' => 'Application',
+            'inbox' => 'https://example.com/actor/inbox',
+            'outbox' => 'https://example.com/actor/outbox',
             'preferredUsername' => 'example.com',
             'publicKey' => [
                 'id' => 'https://example.com/actor#main-key',
diff --git a/api/tests/Case/Service/ActivityPubServiceTest.php b/api/tests/Case/Service/ActivityPubServiceTest.php
index 66c6793dc..c289cbac6 100644
--- a/api/tests/Case/Service/ActivityPubServiceTest.php
+++ b/api/tests/Case/Service/ActivityPubServiceTest.php
@@ -32,6 +32,8 @@ public function testActor(): void
             ],
             'id' => 'https://example.com/actor',
             'type' => 'Application',
+            'inbox' => 'https://example.com/actor/inbox',
+            'outbox' => 'https://example.com/actor/outbox',
             'preferredUsername' => 'example.com',
             'publicKey' => [
                 'id' => 'https://example.com/actor#main-key',