diff --git a/docs/MATCHMAKING.md b/docs/MATCHMAKING.md
index 056a5a34..e1dc171c 100644
--- a/docs/MATCHMAKING.md
+++ b/docs/MATCHMAKING.md
@@ -98,7 +98,7 @@ roles rather than independently designed microservices:
 
 | Role | Responsibility |
 | --- | --- |
-| API | HTTPS/WebSocket auth, profile, queue commands, status resync |
+| API | HTTPS/WebSocket auth, profile, queue commands, status resync, transactional-outbox fan-out |
 | Matcher | Atomic proposal formation from queue state |
 | Allocator | Agones allocation, server registration, assignment delivery |
 | Maintenance worker | Season rollover, initial-connect/no-show expiry, live reconnect-abandonment reconciliation, and other durable lifecycle recovery |