diff --git a/store.go b/store.go
new file mode 100644
index 0000000..b2fbbdd
--- /dev/null
+++ b/store.go
@@ -0,0 +1,41 @@
+package gobist
+
+import "sync"
+
+type Store interface {
+	Set(key string, value any) error
+	Get(key string) (any, error)
+	Delete(key string) error
+}
+
+type memoryStore struct {
+	mx   sync.Mutex
+	data map[string]any
+}
+
+func newMemoryStore() Store {
+	return &memoryStore{data: make(map[string]any)}
+}
+
+func (m *memoryStore) Set(key string, value any) error {
+	m.mx.Lock()
+	m.data[key] = value
+	m.mx.Unlock()
+
+	return nil
+}
+
+func (m *memoryStore) Get(key string) (any, error) {
+	m.mx.Lock()
+	defer m.mx.Unlock()
+
+	return m.data[key], nil
+}
+
+func (m *memoryStore) Delete(key string) error {
+	m.mx.Lock()
+	delete(m.data, key)
+	m.mx.Unlock()
+
+	return nil
+}