diff --git a/greataped/README.md b/greataped/README.md
index 2e18449..1211191 100644
--- a/greataped/README.md
+++ b/greataped/README.md
@@ -19,6 +19,7 @@
 12. [GetFollowers](#get-followers)
 13. [GetFollowing](#get-following)
 14. [PostToOutbox](#post-to-outbox)
+15. [GetOutbox](#get-outbox)
 
 ---
 
@@ -212,3 +213,18 @@ Request:
 Result:
 ```
 [Back to List](#apis)
+
+## Get Outbox
+```
+Request:
+    string username
+
+Result:
+    string @context
+    string id
+    string type
+    int32 totalItems
+    repeated ActivityPubActivity orderedItems
+    string first
+```
+[Back to List](#apis)
diff --git a/greataped/app/commands/spi/get_outbox.go b/greataped/app/commands/spi/get_outbox.go
new file mode 100644
index 0000000..aca288a
--- /dev/null
+++ b/greataped/app/commands/spi/get_outbox.go
@@ -0,0 +1,58 @@
+package spi
+
+import (
+	"time"
+
+	"rail.town/infrastructure/app/activitypub"
+	. "rail.town/infrastructure/components/constants"
+	. "rail.town/infrastructure/components/contracts"
+)
+
+func GetOutbox(x IDispatcher, username string) (IGetOutboxResult, error) {
+	identities := x.FilterIdentities(func(identity IIdentity) bool {
+		return identity.Username() == username
+	})
+
+	x.Assert(identities.HasExactlyOneItem()).Or(ERROR_USER_NOT_FOUND)
+	identity := identities.First()
+
+	actor := x.Format("%s/u/%s", x.PublicUrl(), identity.Username())
+
+	activities := x.FilterActivityPubOutgoingActivities(func(activity IActivityPubOutgoingActivity) bool {
+		return activity.From() == actor && activity.To() == ACTIVITY_PUB_PUBLIC
+	})
+
+	var orderedItems ActivityPubActivities
+	activities.ForEach(func(outgoingActivity IActivityPubOutgoingActivity) {
+		published := time.Unix(0, outgoingActivity.Timestamp()).Format("2006-01-02T15:04:05Z")
+
+		note := activitypub.NewPublicNote(actor, outgoingActivity.Content())
+		noteActivity := note.Wrap(username, x.PublicUrl(), outgoingActivity.UniqueIdentifier())
+
+		object, _ := x.NewActivityPubObject()
+		object.SetContext(ACTIVITY_STREAMS)
+		object.SetType(ACTIVITY_PUB_NOTE)
+		object.SetId(note.Id)
+		object.SetContent(note.Content)
+
+		activity, _ := x.NewActivityPubActivity()
+		activity.SetContext(ACTIVITY_STREAMS)
+		activity.SetType(ACTIVITY_PUB_CREATE)
+		activity.SetId(x.Format("%s/posts/%s", actor, outgoingActivity.UniqueIdentifier()))
+		activity.SetActor(actor)
+		activity.SetTo(noteActivity.To.([]string))
+		activity.SetPublished(published)
+		activity.SetObject(object)
+
+		orderedItems = append(orderedItems, activity)
+	})
+
+	return x.NewGetOutboxResult(
+		ACTIVITY_STREAMS,                // context
+		x.Format("%s/outbox", actor),    // id
+		ACTIVITY_PUB_ORDERED_COLLECTION, // type
+		int32(len(orderedItems)),        // totalItems
+		orderedItems,                    // orderedItems
+		"",                              // first
+	), nil
+}