diff --git a/PROTOCOL.md b/PROTOCOL.md
index 3257b5af..41dea2fd 100644
--- a/PROTOCOL.md
+++ b/PROTOCOL.md
@@ -95,6 +95,8 @@ The protocol in general is based on the OBS Remote protocol created by Bill Hami
       - ["SetMute"](#setmute)
       - ["GetMute"](#getmute)
       - ["ToggleMute"](#togglemute)
+      - ["SetSyncOffset"](#setsyncoffset)
+      - ["GetSyncOffset"](#getsyncoffset)
     - **Scene Items**
       - ["SetSceneItemRender"](#setsourcerender) (a.k.a `SetSourceRender`)
       - ["SetSceneItemPosition"](#setsceneitemposition)
@@ -691,6 +693,29 @@ __Response__ : OK if specified source exists, error otherwise.
 
 ---
 
+#### "SetSyncOffset"
+Set the sync offset of a specific source.
+
+__Request fields__ :
+- **"source"** (string) : the name of the source
+- **"offset"** (integer) : the desired sync offset in nanoseconds
+
+__Response__ : OK if specified source exists, error otherwise.
+
+---
+
+#### "GetSyncOffset"
+Get the sync offset of a specific source.
+
+__Request fields__ :
+- **"source"** (string) : the name of the source
+
+__Response__ : OK if source exists, with these additional fields :
+- **"name"** (string) : source name
+- **"offset"** (integer) : source sync offset, in nanoseconds
+
+---
+
 #### "GetSpecialSources"
 Get configured special sources like Desktop Audio and Mic/Aux sources.
 
diff --git a/WSRequestHandler.cpp b/WSRequestHandler.cpp
index ef4df5e8..48df3a45 100644
--- a/WSRequestHandler.cpp
+++ b/WSRequestHandler.cpp
@@ -77,6 +77,8 @@ WSRequestHandler::WSRequestHandler(QWebSocket* client) :
     messageMap["ToggleMute"] = WSRequestHandler::HandleToggleMute;
     messageMap["SetMute"] = WSRequestHandler::HandleSetMute;
     messageMap["GetMute"] = WSRequestHandler::HandleGetMute;
+    messageMap["SetSyncOffset"] = WSRequestHandler::HandleSetSyncOffset;
+    messageMap["GetSyncOffset"] = WSRequestHandler::HandleGetSyncOffset;
     messageMap["GetSpecialSources"] = WSRequestHandler::HandleGetSpecialSources;
 
     messageMap["SetCurrentSceneCollection"] = WSRequestHandler::HandleSetCurrentSceneCollection;
@@ -710,6 +712,58 @@ void WSRequestHandler::HandleGetMute(WSRequestHandler* req) {
     obs_data_release(response);
 }
 
+void WSRequestHandler::HandleSetSyncOffset(WSRequestHandler* req) {
+    if (!req->hasField("source") ||
+	!req->hasField("offset")) {
+	req->SendErrorResponse("missing request parameters");
+	return;
+    }
+
+    const char* source_name = obs_data_get_string(req->data, "source");
+    int64_t source_sync_offset = (int64_t)obs_data_get_int(req->data, "offset");
+
+    if (!source_name || strlen(source_name) < 1 ||
+	source_sync_offset < 0) {
+	req->SendErrorResponse("invalid request parameters");
+	return;
+    }
+
+    obs_source_t* source = obs_get_source_by_name(source_name);
+    if (!source) {
+        req->SendErrorResponse("specified source doesn't exist");
+	return;
+    }
+
+    obs_source_set_sync_offset(source, source_sync_offset);
+    req->SendOKResponse();
+
+    obs_source_release(source);
+}
+
+void WSRequestHandler::HandleGetSyncOffset(WSRequestHandler* req) {
+    if (!req->hasField("source")) {
+	req->SendErrorResponse("missing request parameters");
+	return;
+    }
+
+    const char* source_name = obs_data_get_string(req->data, "source");
+    if (str_valid(source_name)) {
+	obs_source_t* source = obs_get_source_by_name(source_name);
+
+	obs_data_t* response = obs_data_create();
+	obs_data_set_string(response, "name", source_name);
+	obs_data_set_int(response, "offset", obs_source_get_sync_offset(source));
+
+	req->SendOKResponse(response);
+
+	obs_data_release(response);
+	obs_source_release(source);
+    }
+    else {
+	req->SendErrorResponse("invalid request parameters");
+    }
+}
+
 void WSRequestHandler::HandleSetSceneItemPosition(WSRequestHandler* req) {
     if (!req->hasField("item") ||
         !req->hasField("x") || !req->hasField("y")) {
diff --git a/WSRequestHandler.h b/WSRequestHandler.h
index d51bbb74..7e86f788 100644
--- a/WSRequestHandler.h
+++ b/WSRequestHandler.h
@@ -83,6 +83,8 @@ class WSRequestHandler : public QObject {
     static void HandleToggleMute(WSRequestHandler* req);
     static void HandleSetMute(WSRequestHandler* req);
     static void HandleGetMute(WSRequestHandler* req);
+    static void HandleSetSyncOffset(WSRequestHandler* req);
+    static void HandleGetSyncOffset(WSRequestHandler* req);
     static void HandleGetSpecialSources(WSRequestHandler* req);
 
     static void HandleSetCurrentSceneCollection(WSRequestHandler* req);