diff --git a/libctru/include/3ds.h b/libctru/include/3ds.h
index 125a5ea..48adc16 100644
--- a/libctru/include/3ds.h
+++ b/libctru/include/3ds.h
@@ -55,6 +55,8 @@ extern "C" {
 #include <3ds/services/y2r.h>
 #include <3ds/services/hb.h>
 
+#include <3ds/services/ampxi.h>
+
 #include <3ds/gpu/gx.h>
 #include <3ds/gpu/gpu.h>
 #include <3ds/gpu/gpu-old.h>
diff --git a/libctru/include/3ds/services/ampxi.h b/libctru/include/3ds/services/ampxi.h
new file mode 100644
index 0000000..43f8741
--- /dev/null
+++ b/libctru/include/3ds/services/ampxi.h
@@ -0,0 +1,25 @@
+/**
+ * @file ampxi.h
+ * @brief AMPXI service. This is normally not accessible to userland apps. https://3dbrew.org/wiki/Application_Manager_Services_PXI
+ */
+#pragma once
+
+/**
+ * @brief Initializes AMPXI.
+ * @param servhandle Optional service session handle to use for AMPXI, if zero srvGetServiceHandle() will be used.
+ */
+Result ampxiInit(Handle servhandle);
+
+/// Exits AMPXI.
+void ampxiExit(void);
+
+/**
+ * @brief Writes a TWL save-file to NAND. https://www.3dbrew.org/wiki/AMPXI:WriteTWLSavedata
+ * @param titleid ID of the TWL title.
+ * @param buffer Savedata buffer ptr.
+ * @param size Size of the savedata buffer.
+ * @param image_filepos Filepos to use for writing the data to the NAND savedata file.
+ * @param section_type https://www.3dbrew.org/wiki/AMPXI:WriteTWLSavedata
+ * @param operation https://3dbrew.org/wiki/AM:ImportDSiWare
+ */
+Result ampxiWriteTWLSavedata(u64 titleid, u8 *buffer, u32 size, u32 image_filepos, u8 section_type, u8 operation);
diff --git a/libctru/source/services/ampxi.c b/libctru/source/services/ampxi.c
new file mode 100644
index 0000000..5465755
--- /dev/null
+++ b/libctru/source/services/ampxi.c
@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <3ds/types.h>
+#include <3ds/result.h>
+#include <3ds/svc.h>
+#include <3ds/srv.h>
+#include <3ds/synchronization.h>
+#include <3ds/services/ampxi.h>
+#include <3ds/ipc.h>
+
+static Handle ampxiHandle;
+static int ampxiRefCount;
+
+Result ampxiInit(Handle servhandle)
+{
+	Result res=0;
+	if (AtomicPostIncrement(&ampxiRefCount)) return 0;
+	if(servhandle)
+	{
+		ampxiHandle = servhandle;
+	}
+	else
+	{
+		res = srvGetServiceHandle(&ampxiHandle, "pxi:am9");
+		if (R_FAILED(res)) AtomicDecrement(&ampxiRefCount);
+	}
+	return res;
+}
+
+void ampxiExit(void)
+{
+	if (AtomicDecrement(&ampxiRefCount)) return;
+	svcCloseHandle(ampxiHandle);
+}
+
+Result ampxiWriteTWLSavedata(u64 titleid, u8 *buffer, u32 size, u32 image_filepos, u8 section_type, u8 operation)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x46,6,2); // 0x460182
+	cmdbuf[1] = titleid & 0xffffffff;
+	cmdbuf[2] = (titleid >> 32) & 0xffffffff;
+	cmdbuf[3] = size;
+	cmdbuf[4] = image_filepos;
+	cmdbuf[5] = section_type;
+	cmdbuf[6] = operation;
+
+	cmdbuf[7] = IPC_Desc_PXIBuffer(size, 0, 0);
+	cmdbuf[8] = (u32)buffer;
+
+	if(R_FAILED(ret = svcSendSyncRequest(ampxiHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}