diff --git a/atom/browser/api/atom_api_protocol.cc b/atom/browser/api/atom_api_protocol.cc
index 7571ee0e8377..9170f16b482c 100644
--- a/atom/browser/api/atom_api_protocol.cc
+++ b/atom/browser/api/atom_api_protocol.cc
@@ -56,7 +56,8 @@ mate::ObjectTemplateBuilder Protocol::GetObjectTemplateBuilder(
                  &Protocol::RegisterProtocol<UrlRequestAsyncAsarJob>)
       .SetMethod("registerHttpProtocol",
                  &Protocol::RegisterProtocol<URLRequestFetchJob>)
-      .SetMethod("unregisterProtocol", &Protocol::UnregisterProtocol);
+      .SetMethod("unregisterProtocol", &Protocol::UnregisterProtocol)
+      .SetMethod("isHandledProtocol", &Protocol::IsHandledProtocol);
 }
 
 void Protocol::RegisterStandardSchemes(
@@ -84,6 +85,19 @@ Protocol::ProtocolError Protocol::UnregisterProtocolInIO(
   return PROTOCOL_OK;
 }
 
+void Protocol::IsHandledProtocol(const std::string& scheme,
+                                 const BooleanCallback& callback) {
+  content::BrowserThread::PostTaskAndReplyWithResult(
+      content::BrowserThread::IO, FROM_HERE,
+      base::Bind(&Protocol::IsHandledProtocolInIO,
+                 base::Unretained(this), scheme),
+      callback);
+}
+
+bool Protocol::IsHandledProtocolInIO(const std::string& scheme) {
+  return job_factory_->IsHandledProtocol(scheme);
+}
+
 void Protocol::OnIOCompleted(
     const CompletionCallback& callback, ProtocolError error) {
   // The completion callback is optional.
diff --git a/atom/browser/api/atom_api_protocol.h b/atom/browser/api/atom_api_protocol.h
index c409d34c434d..05e3f6073932 100644
--- a/atom/browser/api/atom_api_protocol.h
+++ b/atom/browser/api/atom_api_protocol.h
@@ -34,6 +34,7 @@ class Protocol : public mate::Wrappable {
   using Handler =
       base::Callback<void(const net::URLRequest*, v8::Local<v8::Value>)>;
   using CompletionCallback = base::Callback<void(v8::Local<v8::Value>)>;
+  using BooleanCallback = base::Callback<void(bool)>;
 
   static mate::Handle<Protocol> Create(
       v8::Isolate* isolate, AtomBrowserContext* browser_context);
@@ -118,10 +119,15 @@ class Protocol : public mate::Wrappable {
       return PROTOCOL_FAIL;
   }
 
-  // Unregistered the protocol handler that handles |scheme|.
+  // Unregister the protocol handler that handles |scheme|.
   void UnregisterProtocol(const std::string& scheme, mate::Arguments* args);
   ProtocolError UnregisterProtocolInIO(const std::string& scheme);
 
+  // Whether the protocol has handler registered.
+  void IsHandledProtocol(const std::string& scheme,
+                         const BooleanCallback& callback);
+  bool IsHandledProtocolInIO(const std::string& scheme);
+
   // Convert error code to JS exception and call the callback.
   void OnIOCompleted(const CompletionCallback& callback, ProtocolError error);