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diff --git a/src/lib/json-utils.h b/src/lib/json-utils.h
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+/*
+ * Copyright (c) 2019, [Ribose Inc](https://www.ribose.com).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef RNP_JSON_UTILS_H_
+#define RNP_JSON_UTILS_H_
+
+#include <stdio.h>
+#include "types.h"
+#include <limits.h>
+#include "json_object.h"
+#include "json.h"
+
+/**
+ * @brief Add field to the json object.
+ *        Note: this function is for convenience, it will check val for NULL and destroy val
+ *        on failure.
+ * @param obj allocated json_object of object type.
+ * @param name name of the field
+ * @param val json object of any type. Will be checked for NULL.
+ * @return true if val is not NULL and field was added successfully, false otherwise.
+ */
+bool obj_add_field_json(json_object *obj, const char *name, json_object *val);
+
+/**
+ * @brief Shortcut to add string via obj_add_field_json().
+ */
+bool json_add(json_object *obj, const char *name, const char *value);
+
+/**
+ * @brief Shortcut to add string with length via obj_add_field_json().
+ */
+bool json_add(json_object *obj, const char *name, const char *value, size_t len);
+
+/**
+ * @brief Shortcut to add bool via obj_add_field_json().
+ */
+bool json_add(json_object *obj, const char *name, bool value);
+
+/**
+ * @brief Add hex representation of binary data as string field to JSON object.
+ *        Note: this function follows conventions of obj_add_field_json().
+ */
+bool obj_add_hex_json(json_object *obj, const char *name, const uint8_t *val, size_t val_len);
+
+/**
+ * @brief Add element to JSON array.
+ *        Note: this function follows convention of the obj_add_field_json.
+ */
+bool array_add_element_json(json_object *obj, json_object *val);
+
+namespace rnp {
+class JSONObject {
+    json_object *obj_;
+
+  public:
+    JSONObject(json_object *obj) : obj_(obj)
+    {
+    }
+
+    ~JSONObject()
+    {
+        if (obj_) {
+            json_object_put(obj_);
+        }
+    }
+};
+} // namespace rnp
+
+#endif