diff --git a/pkg/Kconfig b/pkg/Kconfig
index 537594aa57..4feea70743 100644
--- a/pkg/Kconfig
+++ b/pkg/Kconfig
@@ -54,6 +54,7 @@ rsource "micro-ecc/Kconfig"
 rsource "microcoap/Kconfig"
 rsource "micropython/Kconfig"
 rsource "minmea/Kconfig"
+rsource "mjson/Kconfig"
 rsource "monocypher/Kconfig"
 rsource "mynewt-core/Kconfig"
 rsource "nanocbor/Kconfig"
diff --git a/pkg/mjson/Kconfig b/pkg/mjson/Kconfig
new file mode 100644
index 0000000000..8efce0a8bf
--- /dev/null
+++ b/pkg/mjson/Kconfig
@@ -0,0 +1,9 @@
+# Copyright (c) 2023 Koen Zandberg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+config PACKAGE_MJSON
+    bool "mjson"
+    depends on TEST_KCONFIG
diff --git a/pkg/mjson/Makefile b/pkg/mjson/Makefile
new file mode 100644
index 0000000000..f2d4fd40fc
--- /dev/null
+++ b/pkg/mjson/Makefile
@@ -0,0 +1,10 @@
+PKG_NAME=mjson
+PKG_URL=https://github.com/cesanta/mjson
+# v1.2.7
+PKG_VERSION=032a2eaca1a989e56d88218f2a3cb91a68afebe8
+PKG_LICENSE=MIT
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+all:
+	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src -f $(CURDIR)/$(PKG_NAME).mk
diff --git a/pkg/mjson/Makefile.include b/pkg/mjson/Makefile.include
new file mode 100644
index 0000000000..33bd7b90f0
--- /dev/null
+++ b/pkg/mjson/Makefile.include
@@ -0,0 +1 @@
+INCLUDES += -I$(PKGDIRBASE)/mjson/src
diff --git a/pkg/mjson/doc.txt b/pkg/mjson/doc.txt
new file mode 100644
index 0000000000..043973b2ab
--- /dev/null
+++ b/pkg/mjson/doc.txt
@@ -0,0 +1,16 @@
+/**
+ * @defgroup pkg_mjson   mjson
+ * @ingroup  pkg
+ * @brief    mjson - a JSON parser + emitter + JSON-RPC engine
+ *
+ * # Introduction
+ *
+ * mjson is a small, embedded-friendly JSON parser, emitter and JSON-RPC
+ * engine.
+ *
+ * # License
+ *
+ * Licensed under MIT.
+ *
+ * @see      https://github.com/cesanta/mjson
+ */
diff --git a/pkg/mjson/mjson.mk b/pkg/mjson/mjson.mk
new file mode 100644
index 0000000000..f57a2d5d90
--- /dev/null
+++ b/pkg/mjson/mjson.mk
@@ -0,0 +1,7 @@
+MODULE = mjson
+
+# The mjson_merge function requires an alloca implementation, disabled to
+# prevent stack memory allocations
+CFLAGS += -DMJSON_ENABLE_MERGE=0
+
+include $(RIOTBASE)/Makefile.base