diff --git a/api/api.php b/api/api.php
new file mode 100644
index 0000000..1425895
--- /dev/null
+++ b/api/api.php
@@ -0,0 +1,29 @@
+<?php
+    // 引入类
+    require_once('../inc/require.php');
+    global $config;
+    $url_c = new url();
+
+    $opt = [];
+    $opt['success'] = 'false';
+
+    if(isset($_GET['url'])) {
+        // 添加 HTTP 协议前缀
+        if(!strstr($_GET['url'], 'http://') && !strstr($_GET['url'], 'https:')) $_GET['url'] = 'http://' . $_GET['url'];
+        // 检测网址格式是否正确
+        $is_link = preg_match('(http(|s)://([\w-]+\.)+[\w-]+(/)?)', $_GET['url']);
+        // 判断条件
+        if($_GET['url'] != '' && !strstr($_GET['url'], $_SERVER['HTTP_HOST']) && $is_link) {
+            $opt['success'] = 'true';
+            $opt['content']['url'] = $url_c->set_url($_GET['url'], $config['length']);
+        } else if(strstr($_GET['url'], $_SERVER['HTTP_HOST'])) {
+            $opt['content'] = '链接已经是短地址了。';
+        } else if(!$is_link) {
+            $opt['content'] = '请输入正确格式的网址。';
+        }
+    } else {
+        $opt['content'] = '调用参数不能为空。';
+    }
+    // 输出
+    echo json_encode($opt);
+?>