diff --git a/spectrum_manager/src/APIServer.cpp b/spectrum_manager/src/APIServer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..359f6d483a1b9a4c90f61657a449065d3d140bb4
--- /dev/null
+++ b/spectrum_manager/src/APIServer.cpp
@@ -0,0 +1,92 @@
+#include "APIServer.h"
+#include "methods.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>
+#include <pthread.h>
+#include <fstream>
+#include <string>
+#include <cerrno>
+
+static std::string get_http_var(const struct http_message *hm, const char *name) {
+	char data[4096];
+	data[0] = '\0';
+
+	mg_get_http_var(&hm->body, name, data, sizeof(data));
+	if (data[0] != '\0') {
+		return data;
+	}
+
+	mg_get_http_var(&hm->query_string, name, data, sizeof(data));
+	if (data[0] != '\0') {
+		return data;
+	}
+
+	return "";
+}
+
+APIServer::APIServer(ManagerConfig *config, StorageBackend *storage) {
+	m_config = config;
+	m_storage = storage;
+}
+
+APIServer::~APIServer() {
+}
+
+void APIServer::send_json(struct mg_connection *conn, const std::string &json) {
+	mg_printf(conn,
+			"HTTP/1.1 200 OK\r\n"
+			"Content-Type: text/json\r\n"
+			"Content-Length: %d\r\n"
+			"\r\n"
+			"%s",
+			(int) json.size(), json.c_str());
+}
+
+void APIServer::serve_instances(Server *server, Server::session *session, struct mg_connection *conn, struct http_message *hm) {
+// 	std::string jid = get_http_var(hm, "jid");
+// 	if (!jid.empty()) {
+// 		serve_instance(conn, hm, jid);
+// 		return;
+// 	}
+
+	std::vector<std::string> list = show_list(m_config, false);
+
+	std::string json = "{\"error\":0, \"instances\": [";
+
+	BOOST_FOREACH(std::string &instance, list) {
+		json += "{";
+		json += "\"id\":\"" + instance + "\",";
+		json += "\"name\":\"" + instance + "\",";
+
+		std::string status = server->send_command(instance, "status");
+		if (status.empty()) {
+			status = "Cannot get the instance status.";
+		}
+		else if (*(status.end() - 1) == '\n') {
+			status.erase(status.end() - 1);
+		}
+		json += "\"status\":\"" + status + "\"";
+		json += "},";
+	}
+	json.erase(json.end() - 1);
+
+	json += "]}";
+	send_json(conn, json);
+}
+
+void APIServer::handleRequest(Server *server, Server::session *sess, struct mg_connection *conn, struct http_message *hm) {
+	if (mg_vcmp(&hm->uri, "/api/v1/instances") == 0) {
+		serve_instances(server, sess, conn, hm);
+	}
+}
+
+
+
+
+
+