diff --git a/APIs/schemas/receiver_transport_params_ext.json b/APIs/schemas/receiver_transport_params_ext.json
index 3c6e5d2..24c82d0 100644
--- a/APIs/schemas/receiver_transport_params_ext.json
+++ b/APIs/schemas/receiver_transport_params_ext.json
@@ -10,7 +10,8 @@
         "string",
         "null"
       ],
-      "description": "the URL for the Events API resource for the associated source"
+      "description": "the URL for the Events API resource for the associated source",
+      "format": "uri"
     },
     "ext_is_07_source_id": {
       "type": [
diff --git a/APIs/schemas/sender_transport_params_ext.json b/APIs/schemas/sender_transport_params_ext.json
index c1a9470..cdea637 100644
--- a/APIs/schemas/sender_transport_params_ext.json
+++ b/APIs/schemas/sender_transport_params_ext.json
@@ -7,7 +7,8 @@
   "properties": {
     "ext_is_07_rest_api_url": {
       "type": "string",
-      "description": "the URL for the Events API resource for the associated source"
+      "description": "the URL for the Events API resource for the associated source",
+      "format": "uri"
     },
     "ext_is_07_source_id": {
       "type": "string",