diff --git a/api/v3/api_proto/permissions.proto b/api/v3/api_proto/permissions.proto
new file mode 100644
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+++ b/api/v3/api_proto/permissions.proto
@@ -0,0 +1,61 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+syntax = "proto3";
+
+package monorail.v3;
+
+option go_package = "api/v3/api_proto";
+
+import "google/api/field_behavior.proto";
+import "api/v3/api_proto/permission_objects.proto";
+
+// ***DO NOT CALL rpcs IN THIS SERVICE.***
+// This service is for Monorail's frontend only.
+
+// Permissions service includes all methods needed for fetching permissions.
+service Permissions {
+  // status: DO NOT USE
+  // Returns the requester's permissions for the given resource.
+  //
+  // Raises:
+  //  PERMISSION_DENIED if the given resource does not exist and/or the
+  //      requester does not have permission to view the resource's name space.
+  //  NOT_FOUND if the given resource does not exist.
+  rpc GetPermissionSet (GetPermissionSetRequest) returns (PermissionSet) {}
+
+  // status: DO NOT USE
+  // Returns the requester's permissions for all the given resources.
+  //
+  // Raises:
+  //  PERMISSION_DENIED if any of the given resources do not exist and/or the
+  //      requester does not have permission to view one of the resource's
+  //      name space.
+  // NOT_FOUND if one of the given resources do not exist.
+  rpc BatchGetPermissionSets (BatchGetPermissionSetsRequest) returns (BatchGetPermissionSetsResponse) {}
+}
+
+
+// Request message for the GetPermissionSet emthod.
+// Next available tag: 2
+message GetPermissionSetRequest {
+  // The resource name of the resource permissions to retrieve.
+  string name = 1 [ (google.api.field_behavior) = REQUIRED ];
+}
+
+
+// Request message for the BatchGetPermissionSets method.
+// Next available tag: 2
+message BatchGetPermissionSetsRequest {
+  // The resource names of the resource permissions to retrieve.
+  repeated string names = 1 [ (google.api.field_behavior) = REQUIRED ];
+}
+
+
+// Response message for the BatchGetPermissionSets method.
+// Next available tag: 2
+message BatchGetPermissionSetsResponse {
+  // The Permissions, one for each of the given resources.
+  repeated PermissionSet permission_sets = 1;
+}