diff --git a/lib/icinga/apiactions.cpp b/lib/icinga/apiactions.cpp
index 608c7b200..1c2691aa7 100644
--- a/lib/icinga/apiactions.cpp
+++ b/lib/icinga/apiactions.cpp
@@ -19,6 +19,7 @@
 
 #include "icinga/apiactions.hpp"
 #include "icinga/service.hpp"
+#include "icinga/pluginutility.hpp"
 #include "remote/apiaction.hpp"
 #include "remote/httputility.hpp"
 #include "base/utility.hpp"
@@ -26,11 +27,23 @@
 
 using namespace icinga;
 
+Dictionary::Ptr ApiActions::CreateResult(const int code, const String& status) {
+	Dictionary::Ptr result = new Dictionary();
+	result->Set("code", code);
+	result->Set("status", status);
+	return result;
+}
+
 REGISTER_APIACTION(reschedule_check, "Service;Host", &ApiActions::RescheduleCheck);
+REGISTER_APIACTION(process_check_result, "Service;Host", &ApiActions::ProcessCheckResult);
 
 Dictionary::Ptr ApiActions::RescheduleCheck(const DynamicObject::Ptr& object, const Dictionary::Ptr& params)
 {
 	Checkable::Ptr checkable = static_pointer_cast<Checkable>(object);
+
+	if (!checkable)
+		return ApiActions::CreateResult(404, "Cannot reschedule check for non-existent object");
+
 	if (Convert::ToBool(HttpUtility::GetLastParameter(params, "force")))
 		checkable->SetForceNextCheck(true);
 
@@ -41,8 +54,71 @@ Dictionary::Ptr ApiActions::RescheduleCheck(const DynamicObject::Ptr& object, co
 		nextCheck = Utility::GetTime();
 
 	checkable->SetNextCheck(nextCheck);
-	Dictionary::Ptr result = new Dictionary();
-	result->Set("code", 200);
-	result->Set("status", "yay");
-	return result;
+
+	return ApiActions::CreateResult(200, "Successfully rescheduled check for " + checkable->GetName());
+}
+
+Dictionary::Ptr ApiActions::ProcessCheckResult(const DynamicObject::Ptr& object, const Dictionary::Ptr& params)
+{
+	Checkable::Ptr checkable = static_pointer_cast<Checkable>(object);
+
+	if (!checkable)
+		return ApiActions::CreateResult(404, "Cannot process passive check result for non-existent object");
+
+	if (!checkable->GetEnablePassiveChecks())
+		return ApiActions::CreateResult(403, "Passive checks are disabled for " + checkable->GetName());
+
+	String name;
+
+	Host::Ptr host;
+	Service::Ptr service;
+	tie(host, service) = GetHostService(checkable);
+
+	if (!params->Contains("exit_status"))
+		return ApiActions::CreateResult(403, "Parameter 'exit_status' is required");
+
+	int exitStatus = HttpUtility::GetLastParameter(params, "exit_status");
+
+	ServiceState state;
+
+	if (!service) {
+		name = host->GetName();
+		if (exitStatus == 0)
+			state = ServiceOK;
+		else if (exitStatus == 1)
+			state = ServiceCritical;
+		else
+			return ApiActions::CreateResult(403, "Invalid 'exit_status' for Host " + name);
+	} else {
+		state = PluginUtility::ExitStatusToState(exitStatus);
+		name = service->GetName() + "!" + service->GetHostName();
+	}
+
+	if (!params->Contains("output"))
+		return ApiActions::CreateResult(400, "Parameter 'output' is required");
+
+	CheckResult::Ptr cr = new CheckResult();
+	cr->SetOutput(HttpUtility::GetLastParameter(params, "output"));
+	cr->SetState(state);
+
+	cr->SetCheckSource(HttpUtility::GetLastParameter(params, "check_source"));
+	cr->SetPerformanceData(HttpUtility::GetLastParameter(params, "performance_data"));
+	cr->SetCommand(HttpUtility::GetLastParameter(params, "command"));
+	cr->SetExecutionEnd(HttpUtility::GetLastParameter(params, "execution_end"));
+	cr->SetExecutionStart(HttpUtility::GetLastParameter(params, "execution_start"));
+	cr->SetScheduleEnd(HttpUtility::GetLastParameter(params, "schedule_end"));
+	cr->SetScheduleStart(HttpUtility::GetLastParameter(params, "schedule_start"));
+
+	checkable->ProcessCheckResult(cr);
+
+	if (!service) {
+		ObjectLock olock(checkable);
+
+		/* Reschedule the next check. The side effect of this is that for as long
+		 * as we receive passive results for a service we won't execute any
+		 * active checks. */
+		checkable->SetNextCheck(Utility::GetTime() + checkable->GetCheckInterval());
+	}
+
+	return ApiActions::CreateResult(200, "Successfully processed check result for " + name);
 }
diff --git a/lib/icinga/apiactions.hpp b/lib/icinga/apiactions.hpp
index 567186ccc..7682276d0 100644
--- a/lib/icinga/apiactions.hpp
+++ b/lib/icinga/apiactions.hpp
@@ -34,6 +34,10 @@ class I2_ICINGA_API ApiActions
 {
 public:
 	static Dictionary::Ptr RescheduleCheck(const DynamicObject::Ptr& object, const Dictionary::Ptr& params);
+	static Dictionary::Ptr ProcessCheckResult(const DynamicObject::Ptr& object, const Dictionary::Ptr& params);
+
+private:
+	static Dictionary::Ptr CreateResult(const int code, const String& status);
 };
 
 }