diff --git a/src/services/search/__tests__/query.spec.ts b/src/services/search/__tests__/query.spec.ts
index cbeb13e8..ab4d1ee5 100644
--- a/src/services/search/__tests__/query.spec.ts
+++ b/src/services/search/__tests__/query.spec.ts
@@ -151,6 +151,32 @@ describe('search – query', () => {
           filters: [],
         };
         expect(requireOneFilter).toBeDefined();
+
+        const requestWithQSettings: query.GSearchRequest = {
+          q: 'test',
+          q_settings: {
+            mode: 'query_string',
+            default_operator: 'and',
+          },
+        };
+        expect(requestWithQSettings).toBeDefined();
+
+        const requestWithAdvanced: query.GSearchRequest = {
+          q: 'test',
+          advanced: true,
+        };
+        expect(requestWithAdvanced).toBeDefined();
+
+        // @ts-expect-error `q_settings` and `advanced` are mutually exclusive
+        const requestWithQSettingsAndAdvanced: query.GSearchRequest = {
+          q: 'test',
+          q_settings: {
+            mode: 'query_string' as const,
+            default_operator: 'and',
+          },
+          advanced: true,
+        };
+        expect(requestWithQSettingsAndAdvanced).toBeDefined();
       });
 
       test('Content Generic', async () => {
diff --git a/src/services/search/service/query.ts b/src/services/search/service/query.ts
index 7a3d1140..fc60dc85 100644
--- a/src/services/search/service/query.ts
+++ b/src/services/search/service/query.ts
@@ -95,7 +95,6 @@ type InternalGSearchRequest = {
   q?: string;
   offset?: number;
   limit?: number;
-  advanced?: boolean;
   bypass_visible_to?: boolean;
   result_format_version?: ResultFormatVersion;
   filter_principal_sets?: string[];
@@ -103,19 +102,37 @@ type InternalGSearchRequest = {
   facets?: GFacet[];
   boosts?: GBoost[];
   sort?: GSort[];
+  q_settings?: OpenAPI.components['schemas']['GSearchRequestBodyV1']['q_settings'];
+  advanced?: OpenAPI.components['schemas']['GSearchRequestBodyV1']['advanced'];
 };
 
+/**
+ * `q_settings` and `advanced` are mutually exclusive.
+ * @see https://docs.globus.org/api/search/reference/post_query/#gsearchrequest
+ */
+type QSettingsOrAdvanced =
+  | {
+      q_settings?: InternalGSearchRequest['q_settings'];
+      advanced?: never;
+    }
+  | {
+      advanced?: InternalGSearchRequest['advanced'];
+      q_settings?: never;
+    };
+
 /**
  * You must provide either `q` or `filters`.
  * @see https://docs.globus.org/api/search/reference/post_query/#gsearchrequest
  */
-export type GSearchRequest =
+export type GSearchRequest = (
   | (Omit<InternalGSearchRequest, 'q'> & {
       q: InternalGSearchRequest['q'];
     })
   | (Omit<InternalGSearchRequest, 'filters'> & {
       filters: [GFilter, ...GFilter[]];
-    });
+    })
+) &
+  QSettingsOrAdvanced;
 
 /**
  * @param index_id The UUID of the index to query.