diff --git a/apps_validation/portals.py b/apps_validation/portals.py
new file mode 100644
index 0000000..4331b08
--- /dev/null
+++ b/apps_validation/portals.py
@@ -0,0 +1,51 @@
+from jsonschema import validate as json_schema_validate, ValidationError as JsonValidationError
+
+from apps_exceptions import ValidationErrors
+
+
+IX_NOTES_KEY = 'x-notes'
+IX_PORTAL_KEY = 'x-portals'
+VALIDATION_SCHEMA = {
+    '$schema': 'https://json-schema.org/draft/2020-12/schema',
+    'type': 'object',
+    'properties': {
+        'x-portals': {
+            'type': 'array',
+            'items': {
+                'type': 'object',
+                'properties': {
+                    'name': {
+                        'type': 'string',
+                        'minLength': 1,
+                    },
+                    'path': {
+                        'type': 'string',
+                        'pattern': '^/.*'
+                    },
+                    'scheme': {
+                        'type': 'string',
+                        'enum': ['http', 'https'],
+                    },
+                    'host': {'type': 'string'},
+                    'port': {'type': 'integer'},
+                },
+                'required': ['name', 'scheme', 'host', 'port'],
+                'additionalProperties': False
+            },
+        },
+        'x-notes': {
+            'type': ['string', 'null'],
+        }
+    },
+}
+
+
+def validate_portals_and_notes(schema, data):
+    verrors = ValidationErrors()
+
+    try:
+        json_schema_validate(data, VALIDATION_SCHEMA)
+    except JsonValidationError as e:
+        verrors.add(schema, f'Failed to validate rendered portal config: {e}')
+
+    verrors.check()
diff --git a/apps_validation/validate_templates.py b/apps_validation/validate_templates.py
index 622163e..850a938 100644
--- a/apps_validation/validate_templates.py
+++ b/apps_validation/validate_templates.py
@@ -8,6 +8,7 @@
 from catalog_templating.render import render_templates
 
 from .names import get_test_values_dir_path, get_test_values_from_test_dir
+from .portals import validate_portals_and_notes
 
 
 RE_APP_VERSION = re.compile(r'^v\d+_\d+_\d+$')
@@ -56,6 +57,7 @@ def validate_template_rendering(app_path: str, schema: str, verrors: ValidationE
 
     verrors.check()
 
+    rendered_config = {}
     for test_values_file in test_values_files:
         try:
             rendered = render_templates(
@@ -69,13 +71,19 @@ def validate_template_rendering(app_path: str, schema: str, verrors: ValidationE
             else:
                 for file_name, rendered_template in rendered.items():
                     try:
-                        yaml.safe_load(rendered_template)
+                        rendered_config.update(yaml.safe_load(rendered_template))
                     except yaml.YAMLError as e:
                         verrors.add(
                             f'{schema}.{file_name}',
                             f'Failed to verify rendered template is a valid yaml file using {test_values_file!r}: {e}'
                         )
 
+        if rendered_config:
+            try:
+                validate_portals_and_notes(schema, rendered_config)
+            except ValidationErrors as ve:
+                verrors.extend(ve)
+
 
 def validate_library(app_path: str, schema: str, verrors: ValidationErrors) -> None:
     library_dir = pathlib.Path(os.path.join(app_path, 'templates/library'))