diff --git a/include/clay.h b/include/clay.h
index f35f2a4..09492b9 100644
--- a/include/clay.h
+++ b/include/clay.h
@@ -12,17 +12,15 @@ void clay_init(uint32_t inbox_size, bool open_app_message);
 
 void clay_register_callbacks(const ClayCallbacks *callbacks, void *context);
 
-void clay_remove(const char *key);
+bool clay_remove(const char *key);
 
-void clay_clear();
+bool clay_set_bool(const char *key, bool value);
 
-void clay_set_bool(const char *key, bool value);
+bool clay_set_data(const char *key, const void *data, size_t n);
 
-void clay_set_data(const char *key, const void *data, size_t n);
+bool clay_set_int(const char *key, int value);
 
-void clay_set_int(const char *key, int value);
-
-void clay_set_string(const char *key, const char *value);
+bool clay_set_string(const char *key, const char *value);
 
 bool clay_get_bool(const char *key, bool *value_out);