diff --git a/activities/migrations/0024_post_application.py b/activities/migrations/0024_post_application.py
new file mode 100644
index 00000000..75a19223
--- /dev/null
+++ b/activities/migrations/0024_post_application.py
@@ -0,0 +1,25 @@
+# Generated by Django 4.2.18 on 2025-06-03 13:27
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("api", "0006_pushnotification_icon"),
+        ("activities", "0023_post_subject_identity"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="post",
+            name="application",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.SET_NULL,
+                related_name="posts",
+                to="api.application",
+            ),
+        ),
+    ]
diff --git a/activities/models/post.py b/activities/models/post.py
index bc02ad17..2e768deb 100644
--- a/activities/models/post.py
+++ b/activities/models/post.py
@@ -302,6 +302,15 @@ class Types(models.TextChoices):
         related_name="posts",
     )
 
+    # The application used to create this post (if created via API)
+    application = models.ForeignKey(
+        "api.Application",
+        on_delete=models.SET_NULL,
+        blank=True,
+        null=True,
+        related_name="posts",
+    )
+
     # The state the post is in
     state = StateField(PostStates)
 
@@ -538,6 +547,7 @@ def create_local(
         attachments: list | None = None,
         question: dict | None = None,
         language: str | None = None,
+        application=None,
     ) -> "Post":
         with transaction.atomic():
             # Find mentions in this post
@@ -570,6 +580,7 @@ def create_local(
                 hashtags=hashtags,
                 in_reply_to=reply_to.object_uri if reply_to else None,
                 language=language,
+                application=application,
             )
             post.object_uri = post.urls.object_uri
             post.url = post.absolute_object_uri()
@@ -1280,6 +1291,9 @@ def to_mastodon_json(self, interactions=None, bookmarks=None, identity=None):
             "card": None,
             "text": self.safe_content_remote(),
             "edited_at": format_ld_date(self.edited) if self.edited else None,
+            "application": self.application.to_mastodon_status_json()
+            if self.application
+            else None,
         }
         if interactions:
             value["favourited"] = self.pk in interactions.get("like", [])
diff --git a/api/models/application.py b/api/models/application.py
index 80830633..fbf6cad8 100644
--- a/api/models/application.py
+++ b/api/models/application.py
@@ -54,3 +54,9 @@ def to_mastodon_json(self, include_client_keys=True):
             "redirect_uris": self.redirect_uris,
             "vapid_key": settings.SETUP.VAPID_PUBLIC_KEY,
         }
+
+    def to_mastodon_status_json(self):
+        return {
+            "name": self.name,
+            "website": self.website,
+        }
diff --git a/api/schemas.py b/api/schemas.py
index 32c21fcd..a26d83d3 100644
--- a/api/schemas.py
+++ b/api/schemas.py
@@ -138,6 +138,11 @@ class StatusTag(Schema):
     url: str
 
 
+class StatusApplication(Schema):
+    name: str | None
+    website: str | None
+
+
 class Status(Schema):
     id: str
     uri: str
@@ -168,6 +173,7 @@ class Status(Schema):
     muted: bool = False
     bookmarked: bool = False
     pinned: bool = False
+    application: StatusApplication | None = None
 
     @classmethod
     def from_post(
diff --git a/api/views/statuses.py b/api/views/statuses.py
index 1e0aadd9..4f411366 100644
--- a/api/views/statuses.py
+++ b/api/views/statuses.py
@@ -113,6 +113,7 @@ def post_status(request, details: PostStatusSchema) -> schemas.Status:
         attachments=attachments,
         question=details.poll.dict() if details.poll else None,
         language=details.language,
+        application=request.token.application if request.token else None,
     )
     # Add their own timeline event for immediate visibility
     TimelineEvent.add_post(request.identity, post)