diff --git a/include/toksvc/toksvc.h b/include/toksvc/toksvc.h
index bd596cb..2a41b33 100644
--- a/include/toksvc/toksvc.h
+++ b/include/toksvc/toksvc.h
@@ -187,6 +187,10 @@ toks_api int  toks_main                 (char **, char **);
 toks_api int  toks_output_error_record  (const struct toks_driver_ctx *, const struct toks_error_info *);
 toks_api int  toks_output_error_vector  (const struct toks_driver_ctx *);
 
+/* helper api */
+toks_api  int  toks_string_to_guid      (const char (*)[40], struct _nt_guid *);
+toks_api  void toks_guid_to_string      (const struct _nt_guid *, char (*)[40]);
+
 /* package info */
 toks_api const struct toks_source_version * toks_source_version(void);
 
diff --git a/project/common.mk b/project/common.mk
index 79ad331..5f8b868 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -18,6 +18,7 @@ INTERNAL_SRCS = \
 	src/daemon/toks_daemon_signal.c \
 	src/driver/toks_amain.c \
 	src/driver/toks_driver_ctx.c \
+	src/helper/toks_guid_string.c \
 	src/internal/nolibc/toksvc_compiler.c \
 	src/internal/toksvc_dprintf_impl.c \
 	src/internal/toksvc_log_impl.c \
diff --git a/project/tree.mk b/project/tree.mk
index e1154e5..aaa2ccd 100644
--- a/project/tree.mk
+++ b/project/tree.mk
@@ -2,6 +2,7 @@ TREE_DIRS     = bin src lib \
 		src/client \
 		src/daemon \
 		src/driver \
+		src/helper \
 		src/internal \
 		src/internal/nolibc \
 		src/log \
diff --git a/src/helper/toks_guid_string.c b/src/helper/toks_guid_string.c
new file mode 100644
index 0000000..46ab01d
--- /dev/null
+++ b/src/helper/toks_guid_string.c
@@ -0,0 +1,44 @@
+/*********************************************************/
+/*  toksvc: a framework-native token broker service      */
+/*  Copyright (C) 2020  Z. Gilboa                        */
+/*  Released under GPLv2 and GPLv3; see COPYING.TOKSVC.  */
+/*********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_object.h>
+#include <ntapi/nt_guid.h>
+#include <ntapi/ntapi.h>
+
+#include <toksvc/toksvc.h>
+#include "toksvc_init_impl.h"
+#include "toksvc_driver_impl.h"
+#include "toksvc_nolibc_impl.h"
+
+int toks_string_to_guid(const char (*guidstr)[40], struct _nt_guid * uuid)
+{
+	toks_init();
+
+	return ntapi->tt_string_to_guid_utf8(
+		guidstr[0],uuid);
+}
+
+void toks_guid_to_string(const struct _nt_guid * uuid, char (*guidstr)[40])
+{
+	struct _nt_guid_str_utf8 buf;
+	void *                   addr;
+	char *                   ch;
+
+	toks_init();
+
+	ntapi->tt_guid_to_string_utf8(
+		uuid,&buf);
+
+	addr = &buf.lbrace;
+	ch   = addr;
+
+	toks_memcpy(
+		guidstr[0],
+		ch,sizeof(buf));
+
+	guidstr[0][39] = 0;
+}