diff --git a/packages/sdk/openapi.json b/packages/sdk/openapi.json
index 5a60c4e471..549fcc4fe1 100644
--- a/packages/sdk/openapi.json
+++ b/packages/sdk/openapi.json
@@ -3942,6 +3942,10 @@
               "schema": {
                 "type": "object",
                 "properties": {
+                  "messageID": {
+                    "type": "string",
+                    "pattern": "^msg.*"
+                  },
                   "agent": {
                     "type": "string"
                   },