diff --git a/nova/api/openstack/placement/handlers/resource_provider.py b/nova/api/openstack/placement/handlers/resource_provider.py
index 2148cb498..2fdff3626 100644
--- a/nova/api/openstack/placement/handlers/resource_provider.py
+++ b/nova/api/openstack/placement/handlers/resource_provider.py
@@ -66,8 +66,6 @@ GET_RPS_SCHEMA_1_0 = {
 # Placement API microversion 1.3 adds support for a member_of attribute
 GET_RPS_SCHEMA_1_3 = copy.deepcopy(GET_RPS_SCHEMA_1_0)
 GET_RPS_SCHEMA_1_3['properties']['member_of'] = {
-    # TODO(mriedem): At some point we need to do jsonschema and/or uuid
-    # validation of the value(s) here.
     "type": "string"
 }
 
@@ -290,6 +288,13 @@ def list_resource_providers(req):
                     value = value[3:].split(',')
                 else:
                     value = [value]
+                # Make sure the values are actually UUIDs.
+                for aggr_uuid in value:
+                    if not uuidutils.is_uuid_like(aggr_uuid):
+                        raise webob.exc.HTTPBadRequest(
+                            _('Invalid uuid value: %(uuid)s') %
+                            {'uuid': aggr_uuid},
+                            json_formatter=util.json_error_formatter)
             filters[attr] = value
     if 'resources' in req.GET:
         resources = _normalize_resources_qs_param(req.GET['resources'])
diff --git a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-aggregates.yaml b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-aggregates.yaml
index ef6c37ccb..530367cc5 100644
--- a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-aggregates.yaml
+++ b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-aggregates.yaml
@@ -47,6 +47,12 @@ tests:
   response_json_paths:
       $.resource_providers[0].uuid: 893337e9-1e55-49f0-bcfe-6a2f16fbf2f7
 
+- name: get by aggregates no result not a uuid
+  GET: '/resource_providers?member_of=not+a+uuid'
+  status: 400
+  response_strings:
+      - 'Invalid uuid value: not a uuid'
+
 - name: associate an aggregate with rp2
   PUT: /resource_providers/5202c48f-c960-4eec-bde3-89c4f22a17b9/aggregates
   data: