diff --git a/waku/metadata/v1/waku_metadata.proto b/waku/metadata/v1/waku_metadata.proto
new file mode 100644
index 0000000..a4d8408
--- /dev/null
+++ b/waku/metadata/v1/waku_metadata.proto
@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+// rfc: https://rfc.vac.dev/spec/66/
+package waku.metadata.v1;
+
+message WakuMetadataRequest {
+  optional uint32 cluster_id = 1;
+  repeated uint32 shards = 2;
+}
+
+message WakuMetadataResponse {
+  optional uint32 cluster_id = 1;
+  repeated uint32 shards = 2;
+}