diff --git a/bin/main b/bin/main
index 646dce5..3583c4d 100755
Binary files a/bin/main and b/bin/main differ
diff --git a/src/handler.h b/src/handler.h
index 582eaa4..cfb43ae 100644
--- a/src/handler.h
+++ b/src/handler.h
@@ -1,24 +1,40 @@
-#include <stdio.h>
-#include <string.h>
-#include <microhttpd.h>
-#include "logger.h"
+#include "response_builder.h"
+
+void log_api(const char *url, const char *method) {
+  printf("[%s] %s\n", method, url);
+}
 
 enum MHD_Result default_handler(void *cls, struct MHD_Connection *connection, const char *url,
                                 const char *method, const char *version, const char *upload_data,
                                 size_t *upload_data_size, void **con_cls) {
-  struct MHD_Response *response;
   char *url_str = (char *)url;
   char *method_str = (char *)method;
   int ret;
 
+  struct MHD_Response *response;
+  HTTP_status status;
+  char *response_body = NULL;
+
   log_api(url_str, method_str);
 
-  response = MHD_create_response_from_buffer(strlen(url_str), (void *)url_str, MHD_RESPMEM_PERSISTENT);
+  if (strcmp(url_str, "/") == 0) {
+    response_body = simple_message("Hello, world!");
+    status = OK;
+  } else if (strcmp(url_str, "/users") == 0) {
+    // mandar para modulo de usuarios
+    response_body = simple_message("Sorry, this endpoint is not implemented yet");
+    status = OK;
+  } else {
+    response_body = simple_message("Not found");
+    status = NOT_FOUND;
+  }
+
+  response = HTTP_build_response_JSON(response_body, status);
 
   if (!response)
     return MHD_NO;
 
-  ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
+  ret = MHD_queue_response(connection, status, response);
   MHD_destroy_response(response);
 
   return ret;
diff --git a/src/logger.h b/src/logger.h
deleted file mode 100644
index 1ae3ab8..0000000
--- a/src/logger.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-
-void log_api(const char *url, const char *method) {
-  printf("[%s] %s\n", method, url);
-}
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 7a4e9c6..aecb336 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4,7 +4,6 @@
 #include "handler.h"
 
 #define PORT 8080
-#define color_green "\033[0;32m"
 
 int main() {
     printf("Starting server on port %d\n", PORT);
diff --git a/src/response_builder.h b/src/response_builder.h
new file mode 100644
index 0000000..225078d
--- /dev/null
+++ b/src/response_builder.h
@@ -0,0 +1,16 @@
+#include <microhttpd.h>
+#include "types.h"
+
+struct MHD_Response *HTTP_build_response_JSON(const char *message, HTTP_status status) {
+  struct MHD_Response *response;
+
+  response = MHD_create_response_from_buffer(strlen(message), (void *)message, MHD_RESPMEM_PERSISTENT);
+
+  if (!response)
+    return NULL;
+
+  MHD_add_response_header(response, "Content-Type", "application/json");
+  MHD_add_response_header(response, "Access-Control-Allow-Origin", "*");
+
+  return response;
+}
diff --git a/src/types.h b/src/types.h
new file mode 100644
index 0000000..23a89ba
--- /dev/null
+++ b/src/types.h
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+typedef enum {
+  OK = 200,
+  BAD_REQUEST = 400,
+  NOT_FOUND = 404,
+  INTERNAL_SERVER_ERROR = 500,
+  NOT_IMPLEMENTED = 501
+} HTTP_status;
+
+char *simple_message(const char *message_str) {
+    char *formatted_message = NULL;
+
+    size_t formatted_message_size = strlen(message_str) + 20;
+    formatted_message = (char *)malloc(formatted_message_size);
+
+    if (formatted_message) {
+        snprintf(formatted_message, formatted_message_size, "{\"message\": \"%s\"}", message_str);
+    }
+
+    return formatted_message;
+}
\ No newline at end of file