diff --git a/backend/pkg/api/handlers/public.go b/backend/pkg/api/handlers/public.go
index 7080b80a1..a9c43f9d2 100644
--- a/backend/pkg/api/handlers/public.go
+++ b/backend/pkg/api/handlers/public.go
@@ -539,7 +539,7 @@ func (h *HandlerService) PublicDeleteValidatorDashboardGroupValidators(w http.Re
 func (h *HandlerService) PublicPostValidatorDashboardValidators(w http.ResponseWriter, r *http.Request) {
 	var v validationError
 	dashboardId := v.checkPrimaryDashboardId(mux.Vars(r)["dashboard_id"])
-	type request struct {
+	type request struct { // this must align with PostValidatorDashboardValidatorsRequest
 		GroupId              uint64        `json:"group_id,omitempty" x-nullable:"true"`
 		Validators           []intOrString `json:"validators,omitempty"`
 		DepositAddress       string        `json:"deposit_address,omitempty"`
diff --git a/backend/pkg/api/types/validator_dashboard.go b/backend/pkg/api/types/validator_dashboard.go
index 043fa0dce..6e0122ab2 100644
--- a/backend/pkg/api/types/validator_dashboard.go
+++ b/backend/pkg/api/types/validator_dashboard.go
@@ -365,3 +365,12 @@ type VDBPostValidatorsData struct {
 	Index   uint64 `json:"index"`
 	GroupId uint64 `json:"group_id"`
 }
+
+// helper for frontend
+type PostValidatorDashboardValidatorsRequest struct {
+	GroupId              uint64        `json:"group_id,omitempty" x-nullable:"true"`
+	Validators           []interface{} `json:"validators,omitempty" tstype:"(number | string)[]"`
+	DepositAddress       string        `json:"deposit_address,omitempty"`
+	WithdrawalCredential string        `json:"withdrawal_credential,omitempty"`
+	Graffiti             string        `json:"graffiti,omitempty"`
+}
diff --git a/frontend/types/api/validator_dashboard.ts b/frontend/types/api/validator_dashboard.ts
index 5128ee519..41ffdee03 100644
--- a/frontend/types/api/validator_dashboard.ts
+++ b/frontend/types/api/validator_dashboard.ts
@@ -321,3 +321,13 @@ export interface VDBPostValidatorsData {
   index: number /* uint64 */;
   group_id: number /* uint64 */;
 }
+/**
+ * helper for frontend
+ */
+export interface PostValidatorDashboardValidatorsRequest {
+  group_id?: number /* uint64 */;
+  validators?: (number | string)[];
+  deposit_address?: string;
+  withdrawal_credential?: string;
+  graffiti?: string;
+}