diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7249eda..d802104 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,10 @@ add_subdirectory(libs)
 add_executable(iqos_xapp src/main.cpp)
 
 ## Link libraries
-target_include_directories(iqos_xapp PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
+target_include_directories(iqos_xapp PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/include
+        ${CMAKE_CURRENT_SOURCE_DIR}/libs/flexric/src/xApp
+)
 target_link_libraries(iqos_xapp PUBLIC
         e42_xapp
         -pthread
diff --git a/README.md b/README.md
index 5813981..3e86ee8 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,31 @@ Add a paragraph about the application here...
 
 ## Requirements
 
-- Swig v4.1 or newer (for xapp_sdk);
-- libsctp-dev
-- libpcre2-dev
+- Near-RT RIC FlexRIC;
 
-## Getting Started
\ No newline at end of file
+## Getting Started
+
+### Installing the xApp
+
+After installing FlexRIC, clone the xApp repository with the following command.
+
+```shell
+git clone --recurse-submodules -j8 git@github.com:gercom-ufpa/iqos-xapp.git
+```
+
+Build the xApp.
+
+```shell
+cd iqos-xapp
+mkdir -p build && cd build
+cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DE2AP_VERSION=E2AP_V3 -DKPM_VERSION=KPM_V3_00 ..
+ninja iqos-xapp
+```
+
+### Running the xApp
+
+After building, the xApp can be run with the following command.
+
+```shell
+./iqos-xapp -c xApp.conf
+```
diff --git a/configs/xApp.conf b/configs/xApp.conf
new file mode 100644
index 0000000..3a5aca5
--- /dev/null
+++ b/configs/xApp.conf
@@ -0,0 +1,6 @@
+[NEAR-RIC]
+NEAR_RIC_IP = 127.0.0.1
+
+[XAPP]
+DB_DIR = /tmp/
+DB_NAME = iqos_xapp_db
\ No newline at end of file
diff --git a/include/defer.hpp b/include/defer.hpp
new file mode 100644
index 0000000..d9c4b2e
--- /dev/null
+++ b/include/defer.hpp
@@ -0,0 +1,27 @@
+#ifndef DEFER_HPP
+#define DEFER_HPP
+
+#pragma once
+
+template <typename F>
+struct privDefer
+{
+    F f;
+    explicit privDefer(F f) : f(f) {}
+    ~privDefer() { f(); }
+};
+
+template <typename F>
+privDefer<F> defer_func(F f)
+{
+    return privDefer<F>(f);
+}
+
+#if !defined(DEFER_1) && !defined(DEFER_2) && !defined(DEFER_3) && !defined(defer)
+#define DEFER_1(x, y) x##y
+#define DEFER_2(x, y) DEFER_1(x, y)
+#define DEFER_3(x) DEFER_2(x, __COUNTER__)
+#define defer(code) auto DEFER_3(_defer_) = defer_func([&]() { code; })
+#endif
+
+#endif //DEFER_HPP
diff --git a/src/main.cpp b/src/main.cpp
index 815c82a..7869ffa 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,35 @@
 #include <iostream>
+#include <unistd.h>
 
-int main() {
-    std::cout << "Hello, FlexRIC!" << '\n';
-    return 0;
-}
\ No newline at end of file
+#include "../libs/flexric/src/xApp/e42_xapp_api.h"
+#include "defer.hpp"
+
+int main(int argc, char *argv[]) {
+    // format args
+    fr_args_t args{init_fr_args(argc, argv)};
+
+    // set FlexRIC IP (just for development)
+    args.ip = {"192.168.122.20"};
+
+    // init xApp
+    init_xapp_api(&args);
+    sleep(1);
+
+    // get E2 Nodes
+    e2_node_arr_xapp_t e2Nodes{e2_nodes_xapp_api()};
+    assert(e2Nodes.len > 0 && "There are no E2 nodes connected!");
+
+    // free memory allocated to E2 Nodes when finished
+    defer(free_e2_node_arr_xapp(&e2Nodes));
+
+    // TODO: print E2 nodes infos
+    std::cout << "There are " << static_cast<unsigned>(e2Nodes.len) << " E2 nodes connected" << '\n';
+
+    // wait until all xApp processes have been completed
+    while (try_stop_xapp_api() == false) {
+        usleep(1000); // 1 ms
+    }
+
+    std::cout << "Hello, FlexRIC :)!" << '\n';
+    return EXIT_SUCCESS;
+}