diff --git a/sig-multicluster/README.md b/sig-multicluster/README.md
index 5592a446d..4c802fea9 100644
--- a/sig-multicluster/README.md
+++ b/sig-multicluster/README.md
@@ -53,6 +53,9 @@ The following [subprojects][subproject-definition] are owned by sig-multicluster
 ### kubemci
 - **Owners:**
   - https://raw.githubusercontent.com/GoogleCloudPlatform/k8s-multicluster-ingress/master/OWNERS
+### mcs-api
+- **Owners:**
+  - https://raw.githubusercontent.com/kubernetes-sigs/mcs-api/master/OWNERS
 
 [subproject-definition]: https://github.com/kubernetes/community/blob/master/governance.md#subprojects
 <!-- BEGIN CUSTOM CONTENT -->
diff --git a/sigs.yaml b/sigs.yaml
index a0685e3a7..65ff50323 100644
--- a/sigs.yaml
+++ b/sigs.yaml
@@ -1496,6 +1496,9 @@ sigs:
   - name: kubemci
     owners:
     - https://raw.githubusercontent.com/GoogleCloudPlatform/k8s-multicluster-ingress/master/OWNERS
+  - name: mcs-api
+    owners:
+    - https://raw.githubusercontent.com/kubernetes-sigs/mcs-api/master/OWNERS
 - dir: sig-network
   name: Network
   mission_statement: >