diff --git a/itl/command-icinga.conf b/itl/command-icinga.conf
index 206324a4ea5..eaacf5018ec 100644
--- a/itl/command-icinga.conf
+++ b/itl/command-icinga.conf
@@ -39,3 +39,7 @@ object CheckCommand "exception" {
 object CheckCommand "sleep" {
     import "sleep-check-command"
 }
+
+object CheckCommand "icinga4win-api" {
+	import "icinga4win-api-check-command"
+}
diff --git a/lib/methods/CMakeLists.txt b/lib/methods/CMakeLists.txt
index 9fde9fddb35..10f736e6e98 100644
--- a/lib/methods/CMakeLists.txt
+++ b/lib/methods/CMakeLists.txt
@@ -9,6 +9,7 @@ set(methods_SOURCES
   dummychecktask.cpp dummychecktask.hpp
   exceptionchecktask.cpp exceptionchecktask.hpp
   icingachecktask.cpp icingachecktask.hpp
+  icinga4winapichecktask.cpp icinga4winapichecktask.hpp
   nullchecktask.cpp nullchecktask.hpp
   nulleventtask.cpp nulleventtask.hpp
   pluginchecktask.cpp pluginchecktask.hpp
diff --git a/lib/methods/icinga4winapichecktask.cpp b/lib/methods/icinga4winapichecktask.cpp
new file mode 100644
index 00000000000..b63dac1495a
--- /dev/null
+++ b/lib/methods/icinga4winapichecktask.cpp
@@ -0,0 +1,137 @@
+/* Icinga 2 | (c) 2021 Icinga GmbH | GPLv2+ */
+
+#ifndef _WIN32
+#	include <stdlib.h>
+#endif /* _WIN32 */
+#include "methods/icinga4winapichecktask.hpp"
+#include "icinga/icingaapplication.hpp"
+#include "icinga/pluginutility.hpp"
+#include "base/utility.hpp"
+#include "base/perfdatavalue.hpp"
+#include "base/convert.hpp"
+#include "base/function.hpp"
+#include "base/io-engine.hpp"
+#include "base/json.hpp"
+#include "base/logger.hpp"
+#include "base/tcpsocket.hpp"
+#include "base/tlsstream.hpp"
+#include <boost/asio.hpp>
+#include <boost/beast/core.hpp>
+#include <boost/beast/http.hpp>
+
+using namespace icinga;
+
+REGISTER_FUNCTION_NONCONST(Internal, Icinga4WinApiCheck, &Icinga4WinApiCheckTask::ScriptFunc, "checkable:cr:resolvedMacros:useResolvedMacros");
+
+void Icinga4WinApiCheckTask::ScriptFunc(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr,
+	const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros)
+{
+	using namespace boost::asio;
+	using namespace boost::beast;
+	using namespace boost::beast::http;
+
+	REQUIRE_NOT_NULL(checkable);
+	REQUIRE_NOT_NULL(cr);
+
+	CheckCommand::Ptr command = CheckCommand::ExecuteOverride ? CheckCommand::ExecuteOverride : checkable->GetCheckCommand();
+
+	Host::Ptr host;
+	Service::Ptr service;
+	tie(host, service) = GetHostService(checkable);
+
+	MacroProcessor::ResolverList resolvers;
+
+	if (MacroResolver::OverrideMacros)
+		resolvers.emplace_back("override", MacroResolver::OverrideMacros);
+
+	if (service)
+		resolvers.emplace_back("service", service);
+	resolvers.emplace_back("host", host);
+	resolvers.emplace_back("command", command);
+	resolvers.emplace_back("icinga", IcingaApplication::GetInstance());
+
+	String psCommand = MacroProcessor::ResolveMacros("$icinga4win_api_command_name$", resolvers, checkable->GetLastCheckResult(),
+		nullptr, MacroProcessor::EscapeCallback(), resolvedMacros, useResolvedMacros);
+
+	Dictionary::Ptr arguments = MacroProcessor::ResolveMacros("$icinga4win_api_arguments$", resolvers, checkable->GetLastCheckResult(),
+		nullptr, MacroProcessor::EscapeCallback(), resolvedMacros, useResolvedMacros);
+
+	Dictionary::Ptr params = new Dictionary();
+
+	if (arguments) {
+		ObjectLock oLock (arguments);
+		Array::Ptr dummy = new Array();
+
+		for (auto& kv : arguments) {
+			Array::Ptr arg = MacroProcessor::ResolveArguments(
+				dummy, new Dictionary({{kv.first, kv.second}}), resolvers,
+				checkable->GetLastCheckResult(), resolvedMacros, useResolvedMacros
+			);
+
+			switch (arg ? arg->GetLength() : 0) {
+				case 0:
+					continue;
+				case 1:
+					params->Set(arg->Get(0), true);
+					break;
+				case 2:
+					params->Set(arg->Get(0), arg->Get(1));
+					break;
+				default: {
+					auto k (arg->Get(0));
+
+					arg->Remove(0);
+					params->Set(k, arg);
+				}
+			}
+		}
+	}
+
+	if (resolvedMacros && !useResolvedMacros)
+		return;
+
+	ssl::context ctx (ssl::context::tls);
+	AsioTlsStream conn (IoEngine::Get().GetIoContext(), ctx);
+	request<string_body> req;
+	flat_buffer buf;
+	response<string_body> resp;
+
+	req.method(verb::post);
+	req.target("/v1/checker?command=" + psCommand);
+	req.set(field::content_type, "application/json");
+	req.body() = JsonEncode(params);
+
+	Connect(conn.lowest_layer(), "127.0.0.1", "5668");
+	conn.next_layer().handshake(conn.next_layer().client);
+
+	double start = Utility::GetTime();
+
+	write(conn, req);
+	conn.flush();
+	read(conn, buf, resp);
+
+	double end = Utility::GetTime();
+
+	Dictionary::Ptr result = Dictionary::Ptr(JsonDecode(resp.body()))->Get(psCommand);
+
+	if (Checkable::ExecuteCommandProcessFinishedHandler) {
+		ProcessResult pr;
+		pr.PID = -1;
+		pr.Output = result->Get("checkresult") + " |" + Array::Ptr(result->Get("perfdata"))->Join("");
+		pr.ExecutionStart = start;
+		pr.ExecutionEnd = end;
+		pr.ExitStatus = result->Get("exitcode");
+
+		Checkable::ExecuteCommandProcessFinishedHandler(command->GetName(), pr);
+	} else {
+		cr->SetOutput(result->Get("checkresult"));
+		cr->SetPerformanceData(result->Get("perfdata"));
+		cr->SetState((ServiceState)(int)result->Get("exitcode"));
+		cr->SetExitStatus(result->Get("exitcode"));
+		cr->SetExecutionStart(start);
+		cr->SetExecutionEnd(end);
+		cr->SetCommand(command->GetName());
+
+		checkable->ProcessCheckResult(cr);
+	}
+}
diff --git a/lib/methods/icinga4winapichecktask.hpp b/lib/methods/icinga4winapichecktask.hpp
new file mode 100644
index 00000000000..10824fe653e
--- /dev/null
+++ b/lib/methods/icinga4winapichecktask.hpp
@@ -0,0 +1,30 @@
+/* Icinga 2 | (c) 2021 Icinga GmbH | GPLv2+ */
+
+#ifndef ICINGA4WINAPICHECKTASK_H
+#define ICINGA4WINAPICHECKTASK_H
+
+#include "methods/i2-methods.hpp"
+#include "icinga/service.hpp"
+#include "base/dictionary.hpp"
+
+namespace icinga
+{
+
+/**
+ * Executes checks via local Icinga for Windows API.
+ *
+ * @ingroup methods
+ */
+class Icinga4WinApiCheckTask
+{
+public:
+	static void ScriptFunc(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr,
+		const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros);
+
+private:
+	Icinga4WinApiCheckTask();
+};
+
+}
+
+#endif /* ICINGA4WINAPICHECKTASK_H */
diff --git a/lib/methods/methods-itl.conf b/lib/methods/methods-itl.conf
index f9126f7ca24..07674f50565 100644
--- a/lib/methods/methods-itl.conf
+++ b/lib/methods/methods-itl.conf
@@ -43,6 +43,10 @@ System.assert(Internal.run_with_activation_context(function() {
 		execute = NullCheck
 	}
 
+	template CheckCommand "icinga4win-api-check-command" use (Icinga4WinApiCheck = Internal.Icinga4WinApiCheck) {
+		execute = Icinga4WinApiCheck
+	}
+
 	template EventCommand "null-event-command" use (NullEvent = Internal.NullEvent) {
 		execute = NullEvent
 	}
@@ -64,6 +68,7 @@ System.assert(Internal.run_with_activation_context(function() {
 
 var methods = [
 	"IcingaCheck",
+	"Icinga4WinApiCheck",
 	"ClusterCheck",
 	"ClusterZoneCheck",
 	"PluginCheck",