diff --git a/src/schema/schema_constants.py b/src/schema/schema_constants.py
index e3cfd1a5..acd160fc 100644
--- a/src/schema/schema_constants.py
+++ b/src/schema/schema_constants.py
@@ -6,6 +6,7 @@ class SchemaConstants(object):
     ENTITY_API_APP = 'entity-api'
     COMPONENT_DATASET = 'component-dataset'
     INGEST_PIPELINE_APP = 'ingest-pipeline'
+    INGEST_UI = 'ingest-ui'
     HUBMAP_APP_HEADER = 'X-Hubmap-Application'
     LOCKED_ENTITY_UPDATE_HEADER = 'X-HuBMAP-Update-Override'
     INTERNAL_TRIGGER = 'X-Internal-Trigger'
diff --git a/src/schema/schema_validators.py b/src/schema/schema_validators.py
index a3c56492..802a47d9 100644
--- a/src/schema/schema_validators.py
+++ b/src/schema/schema_validators.py
@@ -41,6 +41,7 @@ def validate_application_header_before_entity_create(options_dict):
     applications_allowed = [
         SchemaConstants.INGEST_API_APP,
         SchemaConstants.INGEST_PIPELINE_APP,
+        SchemaConstants.INGEST_UI,
         SchemaConstants.ENTITY_API_APP
     ]
 
@@ -348,6 +349,7 @@ def validate_application_header_before_property_update(property_key, normalized_
     applications_allowed = [
         SchemaConstants.INGEST_API_APP,
         SchemaConstants.INGEST_PIPELINE_APP,
+        SchemaConstants.INGEST_UI,
         SchemaConstants.ENTITY_API_APP
     ]
 
@@ -906,12 +908,12 @@ def _validate_application_header(applications_allowed, request_headers):
 
     if not app_header:
         msg = f"Unable to proceed due to missing {SchemaConstants.HUBMAP_APP_HEADER} header from request"
-        raise MissingApplicationHeaderException(msg)
+        raise schema_errors.MissingApplicationHeaderException(msg)
 
     # Use lowercase for comparing the application header value against the yaml
     if app_header.lower() not in applications_allowed:
         msg = f"Unable to proceed due to invalid {SchemaConstants.HUBMAP_APP_HEADER} header value: {app_header}"
-        raise InvalidApplicationHeaderException(msg)
+        raise schema_errors.InvalidApplicationHeaderException(msg)
 
 """
 Indicate if the entity meets a criteria to lock out modification updates