diff --git a/nylas/models/grants.py b/nylas/models/grants.py
index 4cae4c1..7d793a2 100644
--- a/nylas/models/grants.py
+++ b/nylas/models/grants.py
@@ -83,23 +83,30 @@ class ListGrantsQueryParams(TypedDict):
         limit: The maximum number of objects to return.
             This field defaults to 10. The maximum allowed value is 200.
         offset: Offset grant results by this number.
-        sortBy: Sort entries by field name
-        orderBy: Specify ascending or descending order.
+        sort_by: Sort entries by field name.
+        order_by: Specify ascending or descending order.
         since: Scope grants from a specific point in time by Unix timestamp.
         before: Scope grants to a specific point in time by Unix timestamp.
         email: Filtering your query based on grant email address (if applicable)
-        grantStatus: Filtering your query based on grant email status (if applicable)
+        grant_status: Filtering your query based on grant email status (if applicable)
         ip: Filtering your query based on grant IP address
         provider: Filtering your query based on OAuth provider
+        sortBy: Deprecated camelCase alias for sort_by.
+        orderBy: Deprecated camelCase alias for order_by.
+        grantStatus: Deprecated camelCase alias for grant_status.
     """
 
     limit: NotRequired[int]
     offset: NotRequired[int]
-    sortBy: NotRequired[str]
-    orderBy: NotRequired[str]
+    sort_by: NotRequired[str]
+    order_by: NotRequired[str]
     since: NotRequired[int]
     before: NotRequired[int]
     email: NotRequired[str]
-    grantStatus: NotRequired[str]
+    grant_status: NotRequired[str]
     ip: NotRequired[str]
     provider: NotRequired[Provider]
+    # Backward-compatible aliases for callers still passing camelCase keys.
+    sortBy: NotRequired[str]
+    orderBy: NotRequired[str]
+    grantStatus: NotRequired[str]
diff --git a/nylas/resources/grants.py b/nylas/resources/grants.py
index 06a951b..4a7675b 100644
--- a/nylas/resources/grants.py
+++ b/nylas/resources/grants.py
@@ -13,6 +13,28 @@
 from nylas.models.response import Response, ListResponse, DeleteResponse
 
 
+def _normalize_grants_query_params(query_params: ListGrantsQueryParams = None) -> dict:
+    if not query_params:
+        return query_params
+
+    normalized_query_params = dict(query_params)
+    key_aliases = {
+        "sortBy": "sort_by",
+        "orderBy": "order_by",
+        "grantStatus": "grant_status",
+    }
+
+    for camel_case_key, snake_case_key in key_aliases.items():
+        if camel_case_key in normalized_query_params:
+            if snake_case_key not in normalized_query_params:
+                normalized_query_params[snake_case_key] = normalized_query_params[
+                    camel_case_key
+                ]
+            del normalized_query_params[camel_case_key]
+
+    return normalized_query_params
+
+
 class Grants(
     ListableApiResource,
     FindableApiResource,
@@ -47,7 +69,7 @@ def list(
         return super().list(
             path="/v3/grants",
             response_type=Grant,
-            query_params=query_params,
+            query_params=_normalize_grants_query_params(query_params),
             overrides=overrides,
         )
 
diff --git a/tests/resources/test_grants.py b/tests/resources/test_grants.py
index bcb6e88..c96a675 100644
--- a/tests/resources/test_grants.py
+++ b/tests/resources/test_grants.py
@@ -68,6 +68,61 @@ def test_list_grants(self, http_client_list_response):
             "GET", "/v3/grants", None, None, None, overrides=None
         )
 
+    def test_list_grants_normalizes_camel_case_query_params(
+        self, http_client_list_response
+    ):
+        grants = Grants(http_client_list_response)
+
+        grants.list(
+            query_params={
+                "sortBy": "created_at",
+                "orderBy": "asc",
+                "grantStatus": "valid",
+                "limit": 10,
+            }
+        )
+
+        http_client_list_response._execute.assert_called_once_with(
+            "GET",
+            "/v3/grants",
+            None,
+            {
+                "sort_by": "created_at",
+                "order_by": "asc",
+                "grant_status": "valid",
+                "limit": 10,
+            },
+            None,
+            overrides=None,
+        )
+
+    def test_list_grants_prefers_snake_case_query_params(self, http_client_list_response):
+        grants = Grants(http_client_list_response)
+
+        grants.list(
+            query_params={
+                "sortBy": "updated_at",
+                "sort_by": "created_at",
+                "orderBy": "desc",
+                "order_by": "asc",
+                "grantStatus": "invalid",
+                "grant_status": "valid",
+            }
+        )
+
+        http_client_list_response._execute.assert_called_once_with(
+            "GET",
+            "/v3/grants",
+            None,
+            {
+                "sort_by": "created_at",
+                "order_by": "asc",
+                "grant_status": "valid",
+            },
+            None,
+            overrides=None,
+        )
+
     def test_find_grant(self, http_client_response):
         grants = Grants(http_client_response)