diff --git a/src/endorse-collection.proto b/src/endorse-collection.proto
new file mode 100644
index 0000000..d3aa574
--- /dev/null
+++ b/src/endorse-collection.proto
@@ -0,0 +1,10 @@
+package Chronos;
+
+message EndorseCollection
+{
+  message Endorsement
+  {
+    required string blob = 1;
+  }
+  repeated Endorsement endorsement = 1;
+}
\ No newline at end of file