diff --git a/internal/machine/store/store.go b/internal/machine/store/store.go
index 719cec69..111121d8 100644
--- a/internal/machine/store/store.go
+++ b/internal/machine/store/store.go
@@ -1,6 +1,28 @@
 package store
 
-import _ "embed"
+import (
+	_ "embed"
+	"fmt"
+	"uncloud/internal/corrosion"
+	"uncloud/internal/machine/api/pb"
+)
 
 //go:embed schema.sql
 var Schema string
+
+// Store is a cluster store backed by a distributed Corrosion database.
+type Store struct {
+	corro *corrosion.APIClient
+}
+
+func New(corro *corrosion.APIClient) *Store {
+	return &Store{corro: corro}
+}
+
+func (s *Store) CreateMachine(machine *pb.MachineInfo) error {
+	return fmt.Errorf("not implemented")
+}
+
+func (s *Store) ListMachines() ([]*pb.MachineInfo, error) {
+	return nil, fmt.Errorf("not implemented")
+}