diff --git a/src/mp_api/routes/search/query_operators.py b/src/mp_api/routes/search/query_operators.py
index 71e725e9..357c3c8c 100644
--- a/src/mp_api/routes/search/query_operators.py
+++ b/src/mp_api/routes/search/query_operators.py
@@ -141,6 +141,38 @@ def ensure_indexes(self):  # pragma: no cover
         return [("theoretical", False)]
 
 
+class SearchESQuery(QueryOperator):
+    """
+    Method to generate a query on search electronic structure data.
+    """
+
+    def query(
+        self,
+        is_gap_direct: Optional[bool] = Query(
+            None, description="Whether a band gap is direct or not."
+        ),
+        is_metal: Optional[bool] = Query(
+            None, description="Whether the material is considered a metal."
+        ),
+    ) -> STORE_PARAMS:
+
+        crit = defaultdict(dict)  # type: dict
+
+        if is_gap_direct is not None:
+            crit["is_gap_direct"] = is_gap_direct
+
+        if is_metal is not None:
+            crit["is_metal"] = is_metal
+
+        return {"criteria": crit}
+
+    def ensure_indexes(self):  # pragma: no cover
+
+        keys = ["is_gap_direct", "is_metal"]
+
+        return [(key, False) for key in keys]
+
+
 class SearchStatsQuery(QueryOperator):
     """
     Method to generate a query on search stats data
diff --git a/src/mp_api/routes/search/resources.py b/src/mp_api/routes/search/resources.py
index eb5bea60..1a0418fa 100644
--- a/src/mp_api/routes/search/resources.py
+++ b/src/mp_api/routes/search/resources.py
@@ -21,6 +21,7 @@
     SearchIsTheoreticalQuery,
     SearchMagneticQuery,
     SearchStatsQuery,
+    SearchESQuery,
 )
 
 
@@ -36,6 +37,7 @@ def search_resource(search_store):
             SearchIsStableQuery(),
             SearchIsTheoreticalQuery(),
             SearchMagneticQuery(),
+            SearchESQuery(),
             NumericQuery(model=SearchDoc, excluded_fields=["composition"]),
             HasPropsQuery(),
             DeprecationQuery(),