diff --git a/src/meson.build b/src/meson.build
index 36e4c5f..4aa844a 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -122,6 +122,7 @@ executable(meson.project_name(),
   'timer_oro_api.cpp',
   'oro/originsdb.cpp',
   'oro/api.cpp',
+  'oro/api_nap_exception.cpp',
   oro_rest_sources,
   project_config_file,
   install: true,
diff --git a/src/oro/api_nap.cpp b/src/oro/api_nap.cpp
index 6a740c1..62d5564 100644
--- a/src/oro/api_nap.cpp
+++ b/src/oro/api_nap.cpp
@@ -19,6 +19,7 @@
 #include "private/v1_endpoints.hpp"
 #include "private/dateconv.hpp"
 #include "duckhandy/int_conv.hpp"
+#include "api_nap_exception.hpp"
 #include <optional>
 
 namespace sjd = simdjson::dom;
@@ -223,6 +224,9 @@ template <typename T, typename F>
 std::pair<Header, T> ApiNap::fetch_and_parse (const char* endpoint, F&& data_fill) {
 	auto resp = m_qrest.fetch(m_prefix + endpoint);
 
+	if (200 != resp.code)
+		throw ServerError(resp);
+
 	T dataret;
 	{
 		std::unique_lock lock(m_json_mutex);
diff --git a/src/oro/api_nap_exception.cpp b/src/oro/api_nap_exception.cpp
new file mode 100644
index 0000000..39968c7
--- /dev/null
+++ b/src/oro/api_nap_exception.cpp
@@ -0,0 +1,38 @@
+/* Copyright 2020, Michele Santullo
+ * This file is part of orotool.
+ *
+ * Orotool is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Orotool is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Orotool.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "api_nap_exception.hpp"
+#include "nap/http_response.hpp"
+#include <string>
+
+namespace oro {
+
+ServerError::ServerError (const nap::HttpResponse& resp) :
+	std::runtime_error(
+		std::string("Server replied: ") + std::to_string(resp.code) + " (" +
+			std::string(resp.http_ver) + ", \"" + std::string(resp.code_desc) +
+			"\")"
+	),
+	m_err_code(static_cast<int>(resp.code))
+{
+}
+
+int ServerError::error_code() const noexcept {
+	return m_err_code;
+}
+
+} //namespace oro
diff --git a/src/oro/api_nap_exception.hpp b/src/oro/api_nap_exception.hpp
new file mode 100644
index 0000000..230bd99
--- /dev/null
+++ b/src/oro/api_nap_exception.hpp
@@ -0,0 +1,37 @@
+/* Copyright 2020, Michele Santullo
+ * This file is part of orotool.
+ *
+ * Orotool is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Orotool is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Orotool.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdexcept>
+
+namespace nap {
+struct HttpResponse;
+} //namespace nap
+
+namespace oro {
+
+class ServerError : public std::runtime_error {
+public:
+	explicit ServerError (const nap::HttpResponse& resp);
+	int error_code() const noexcept;
+
+private:
+	int m_err_code;
+};
+
+} //namespace oro
diff --git a/src/timer_oro_api.cpp b/src/timer_oro_api.cpp
index 22a47f2..8e8c6ec 100644
--- a/src/timer_oro_api.cpp
+++ b/src/timer_oro_api.cpp
@@ -20,6 +20,8 @@
 #include "oro/api.hpp"
 #if defined(OROTOOL_WITH_RESTCCPP)
 #	include <restc-cpp/error.h>
+#elif defined(OROTOOL_WITH_NAP)
+#	include "oro/api_nap_exception.hpp"
 #endif
 #include <exception>
 
@@ -79,6 +81,15 @@ inline void TimerOroApi<Op>::fetch_data() {
 			throw err;
 		}
 	}
+#elif defined(OROTOOL_WITH_NAP)
+	catch (const oro::ServerError& err) {
+		status_code = err.error_code();
+		if (429 == status_code) {
+		}
+		else {
+			throw err;
+		}
+	}
 #endif
 	catch (...) {
 		this->set_exception(std::current_exception());