diff --git a/libctru/include/3ds/services/boss.h b/libctru/include/3ds/services/boss.h
index aad3ce4..10f9202 100644
--- a/libctru/include/3ds/services/boss.h
+++ b/libctru/include/3ds/services/boss.h
@@ -39,11 +39,22 @@ typedef struct
 	u8 property_x3e[0x200];
 } bossContext;
 
+/// BOSS task status.
 typedef enum {
 	BOSSTASKSTATUS_STARTED = 0x2,
 	BOSSTASKSTATUS_ERROR = 0x7,
 } bossTaskStatus;
 
+/// Type values for bossGetNsDataHeaderInfo().
+typedef enum {
+	bossNsDataHeaderInfoType_ContentSize = 0x3 /// Size of the content.
+} bossNsDataHeaderInfoTypes;
+
+/// Size of the output data for bossGetNsDataHeaderInfo().
+typedef enum {
+	bossNsDataHeaderInfoTypeSize_ContentSize = 0x4 ///Type2
+} bossNsDataHeaderInfoTypeSizes;
+
 /**
  * @brief Initializes BOSS.
  * @param programID programID to use, 0 for the current process. Only used when BOSSP is available without *hax payload.
@@ -98,6 +109,15 @@ Result bossSendProperty(u16 PropertyID, const void* buf, u32 size);
  */
 Result bossDeleteNsData(u32 NsDataId);
 
+/**
+ * @brief Gets header info for the specified NsDataId.
+ * @param NsDataId NsDataId
+ * @param type Type of data to load.
+ * @param buffer Output buffer.
+ * @param size Output buffer size.
+ */
+Result bossGetNsDataHeaderInfo(u32 NsDataId, u8 type, void* buffer, u32 size);
+
 /**
  * @brief Reads data from the content for the specified NsDataId.
  * @param NsDataId NsDataId
diff --git a/libctru/source/services/boss.c b/libctru/source/services/boss.c
index 26cd899..1d669fc 100644
--- a/libctru/source/services/boss.c
+++ b/libctru/source/services/boss.c
@@ -247,6 +247,23 @@ Result bossDeleteNsData(u32 NsDataId)
 	return (Result)cmdbuf[1];
 }
 
+Result bossGetNsDataHeaderInfo(u32 NsDataId, u8 type, void* buffer, u32 size)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x27,3,2); // 0x2700C2
+	cmdbuf[1] = NsDataId;
+	cmdbuf[2] = type;
+	cmdbuf[3] = size;
+	cmdbuf[4] = IPC_Desc_Buffer(size, IPC_BUFFER_W);
+	cmdbuf[5] = (u32)buffer;
+
+	if(R_FAILED(ret = svcSendSyncRequest(bossHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}
+
 Result bossReadNsData(u32 NsDataId, u64 offset, void* buffer, u32 size, u32 *transfer_total, u32 *unk_out)
 {
 	Result ret = 0;