diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8c09411
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/vendor/
+/composer.lock
+/.idea
+/demo.php
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..c52e353
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 lushaoming
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b066cd8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,85 @@
+## About Open Api
+
+​		Through the open interface, developers can easily and quickly access functions such as sending text messages or sending emails.
+
+## Existing features
+
+- Send SMS
+- Send email
+
+## How to use?
+
+### Install
+
+```shell
+composer repuire bryce/openapi
+```
+
+### Send SMS verification code
+
+```php
+<?php
+/**
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+require_once 'vendor/autoload.php';
+
+$sms = new \Bryce\OpenApi\Sms();
+
+$sms->setClientId('Your client id');
+$sms->setClientKey('Your client key');
+
+if ($sms->send('188****1019')) exit('Success');
+else exit('Failure');
+```
+
+> - You should have permission to send sms
+> - Each mobile phone number can only send 1 text message per minute, and up to 5 text messages per day.
+
+## Verify SMS Verification Code
+
+```php
+<?php
+/**
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+require_once 'vendor/autoload.php';
+
+$mailer = new \Bryce\OpenApi\Sms();
+
+$sms->setClientId('Your client id');
+$sms->setClientKey('Your client key');
+
+if ($mailer->verifyCode('188****1019', 434307)) exit('Success');
+else exit('Failure');
+```
+
+
+
+## Send email
+
+```php
+<?php
+/**
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+require_once 'vendor/autoload.php';
+
+$mailer = new \Bryce\OpenApi\Mailer();
+
+$mailer->setClientId('Your client id');
+$mailer->setClientKey('Your client key');
+
+if ($mailer->send('To email', 'subject', 'body')) exit('Success');
+else exit('Failure');
+```
+
+> - You should have permission to send mail
+> - Sending attachments is currently not supported
+
+## How to get Client ID?
+
+[Get client ID now](http://core.lushaoming.site/apply)
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..0320a4a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,21 @@
+{
+    "name": "bryce/openapi",
+    "description": "Open API",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Bryce",
+            "email": "lushaoming6@gmail.com"
+        }
+    ],
+    "minimum-stability": "dev",
+    "require": {
+        "php": ">=7.1.1"
+    },
+    "autoload": {
+        "psr-4": {
+            "Bryce\\OpenApi\\": "src/Bryce/OpenApi"
+        }
+    }
+}
diff --git a/src/Bryce/OpenApi/BaseApi.php b/src/Bryce/OpenApi/BaseApi.php
new file mode 100644
index 0000000..9ed19fe
--- /dev/null
+++ b/src/Bryce/OpenApi/BaseApi.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * Class BaseApi
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi;
+
+use Bryce\OpenApi\Common\Tools;
+
+class BaseApi
+{
+    protected $params = [];
+    protected $clientKey;
+
+    public function __construct()
+    {
+        $this->params = [
+            'timestamp' => Tools::getCurrentTime(),
+            'nonce' => Tools::createNonce(),
+        ];
+    }
+
+    public function setClientId($clientId)
+    {
+        $this->params['client_id'] = $clientId;
+    }
+
+    public function setClientKey($key)
+    {
+        $this->clientKey = $key;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Common/Config.php b/src/Bryce/OpenApi/Common/Config.php
new file mode 100644
index 0000000..5fdcf66
--- /dev/null
+++ b/src/Bryce/OpenApi/Common/Config.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * All configs.
+ * Do not edit this file.
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi\Common;
+
+class Config
+{
+    const CONFIGS = [
+        'domain' => 'http://core.lushaoming.site',
+        'permissions' => ['send_sms', 'send_email'],
+        'sign_method' => 'md5',
+        'send_email_url' => 'http://core.lushaoming.site/api/mailer/send',
+        'send_sms_url' => 'http://core.lushaoming.site/api/sms/send-verify-code',
+        'verify_sms_code_url' => 'http://core.lushaoming.site/api/sms/verify-code',
+    ];
+
+    public static function getConfigs()
+    {
+        return self::CONFIGS;
+    }
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Common/Tools.php b/src/Bryce/OpenApi/Common/Tools.php
new file mode 100644
index 0000000..793ff3e
--- /dev/null
+++ b/src/Bryce/OpenApi/Common/Tools.php
@@ -0,0 +1,131 @@
+<?php
+/**
+ * Class Tools
+ * Common methods
+ * @author 卢绍明<lusm@sz-bcs.com.cn>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi\Common;
+
+class Tools
+{
+
+    /**
+     * @return int
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function getCurrentTime()
+    {
+        return time();
+    }
+
+    /**
+     * @param int $length Nonce length, default 16
+     * @return string
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function createNonce($length = 16): string
+    {
+        $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+        $return_str = '';
+        for ($i = 0; $i < $length; $i ++) {
+            $rant = mt_rand(0, mb_strlen($str) - 1);
+            $return_str .= mb_substr($str, $rant, 1);
+        }
+        return $return_str;
+    }
+
+
+    /**
+     * @param array $data  Data involved in signing
+     * @param string $key  Client secret, must be kept secret
+     * @return string
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function sign(array $data, string $key): string
+    {
+        if (isset($data['sign'])) unset($data['sign']);
+
+        ksort($data);
+        $arr = [];
+        foreach ($data as $k => $v) {
+            $arr[] = "{$k}={$v}";
+        }
+
+        $str = implode('&', $arr);
+        $str .= "&key={$key}";
+
+        return strtoupper(md5($str));
+    }
+
+    /**
+     * @param array $params
+     * @return bool
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function checkCommonParams(array $params): bool
+    {
+        if (!isset($params['client_id'])
+            || !isset($params['timestamp'])
+            || !isset($params['nonce'])
+            || !isset($params['sign']))
+            return false;
+        return true;
+    }
+
+    /**
+     * @param array $params
+     * @return bool
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function checkSmsParams($params = []): bool
+    {
+        if (!isset($params['mobile'])) return false;
+        return true;
+    }
+
+    public static function checkSmsVerifyData($params = []): bool
+    {
+        if (!isset($params['mobile']) || !isset($params['code'])) return false;
+
+        return true;
+    }
+
+    /**
+     * @param array $params
+     * @return bool
+     * @author Bryce<lushaoming6@gmail.com>
+     * @date   2019/12/12
+     */
+    public static function checkEmailParams($params = []): bool
+    {
+        if (!isset($params['to']) || !isset($params['subject']) || !isset($params['body'])) return false;
+        return true;
+    }
+
+    public static function curlPost(string $url, array $params)
+    {
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $url);
+        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
+        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+
+        curl_setopt($ch, CURLOPT_POST, TRUE);
+        curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
+
+        $output = curl_exec($ch);
+        curl_close($ch);
+        return $output;
+    }
+
+    public static function dealCurlResult($result)
+    {
+        return json_encode($result);
+    }
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Exception/MailException.php b/src/Bryce/OpenApi/Exception/MailException.php
new file mode 100644
index 0000000..3a8c1fd
--- /dev/null
+++ b/src/Bryce/OpenApi/Exception/MailException.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Class ${NAME}
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi\Exception;
+
+class MailException extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Exception/SmsException.php b/src/Bryce/OpenApi/Exception/SmsException.php
new file mode 100644
index 0000000..13c9fd7
--- /dev/null
+++ b/src/Bryce/OpenApi/Exception/SmsException.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Class SmsException
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi\Exception;
+
+class SmsException extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Mailer.php b/src/Bryce/OpenApi/Mailer.php
new file mode 100644
index 0000000..6c84189
--- /dev/null
+++ b/src/Bryce/OpenApi/Mailer.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * Class Mailer
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi;
+
+use Bryce\OpenApi\Common\Config;
+use Bryce\OpenApi\Common\Tools;
+
+class Mailer extends BaseApi
+{
+    public function send(string $to, string $subject, string $body, $from = null)
+    {
+        $this->params['to'] = $to;
+        $this->params['subject'] = $subject;
+        $this->params['body'] = $body;
+        if (!is_null($from)) $this->params['from'] = $from;
+
+        $this->params['sign'] = Tools::sign($this->params, $this->clientKey);
+
+        $res = Tools::curlPost(Config::CONFIGS['send_email_url'], $this->params);
+
+        $res = Tools::dealCurlResult($res);
+
+        return $res->status === 0;
+    }
+}
\ No newline at end of file
diff --git a/src/Bryce/OpenApi/Sms.php b/src/Bryce/OpenApi/Sms.php
new file mode 100644
index 0000000..ac4652f
--- /dev/null
+++ b/src/Bryce/OpenApi/Sms.php
@@ -0,0 +1,41 @@
+<?php
+/**
+ * Class Mailer
+ * @author Bryce<lushaoming6@gmail.com>
+ * @date   2019/12/12
+ */
+namespace Bryce\OpenApi;
+
+use Bryce\OpenApi\Common\Config;
+use Bryce\OpenApi\Common\Tools;
+
+class Sms extends BaseApi
+{
+    public function send(string $mobile)
+    {
+        $this->params['mobile'] = $mobile;
+
+        $this->params['sign'] = Tools::sign($this->params, $this->clientKey);
+
+        $res = Tools::curlPost(Config::CONFIGS['send_sms_url'], $this->params);
+
+        $res = Tools::dealCurlResult($res);
+
+        return $res->status === 0;
+    }
+
+    public function verifyCode(string $mobile, $code)
+    {
+        $this->params['mobile'] = $mobile;
+        $this->params['code'] = $code;
+
+        $this->params['sign'] = Tools::sign($this->params, $this->clientKey);
+        var_dump($this->params);
+        $res = Tools::curlPost(Config::CONFIGS['verify_sms_code_url'], $this->params);
+
+        var_dump($res);
+        $res = Tools::dealCurlResult($res);
+
+        return $res->status === 0;
+    }
+}
\ No newline at end of file