diff --git a/config/config.sample.php b/config/config.sample.php
index 22f045f..c4404d6 100644
--- a/config/config.sample.php
+++ b/config/config.sample.php
@@ -21,6 +21,12 @@ define('FEDIINFO', [
   'pubkey' => ROOT.'/public/static/pub.pem',
   'privkey' => ROOT.'/data/priv.pem',
 ]);
+define('OPENPROVIDER', [
+  'username' => '',
+  'password' => '',
+  'ip' => '0.0.0.0',
+  'owner_handle' => 'HK912631-JP',
+]);
 
 define('MAILER_ENABLED', false);
 define('LOGGING_ENABLED', true);
diff --git a/src/Site/Controller/Page.php b/src/Site/Controller/Page.php
index 5adcc3d..dd94c46 100644
--- a/src/Site/Controller/Page.php
+++ b/src/Site/Controller/Page.php
@@ -5,11 +5,20 @@ use Site\Controller\Mods;
 use Std\Lib\Auth;
 use Std\Lib\Template;
 
+
+use Std\Lib\Openprovider;
+
 class Page {
   use Mods;
 
   public function about(array $params): void {
     try {
+      $op = new OpenProvider();
+      $op->login();
+      // kys($op->getToken());
+      // kys($op->checkDomainAvailable(['076.moe', '076.xxx', '076.nigger']));
+      // kys($op->listTlds());
+      kys($op->searchCustomers());
       $tmpl = new Template('/');
       $pagetit = '新ページ';
       $description = 'PHPフレームワークについて';
diff --git a/src/Std/Lib/Curl.php b/src/Std/Lib/Curl.php
index dfb8662..f33f0bf 100644
--- a/src/Std/Lib/Curl.php
+++ b/src/Std/Lib/Curl.php
@@ -22,7 +22,12 @@ class Curl {
   private bool     $verifySSL = true;
   private string   $username = '';
   private string   $password = '';
+  private string   $token = '';
   private string   $referer = '';
+  private string   $authType = '';
+
+  // デバッグ用
+  private string  $DEBUG_REQ_HDR = '';
 
   // レスポンス関連のプロパティ
   private array  $responseHeaders = [];
@@ -195,9 +200,35 @@ class Curl {
    * @param string $password  パスワード
    * @return Curl  このインスタンス（メソッドチェーン用）
    */
-  public function setBasicAuth(string $username, string $password): Curl {
-    $this->username = $username;
-    $this->password = $password;
+  public function setBasicAuth(string $username = '', string $password = ''): Curl {
+    if ($username !== '') $this->username = $username;
+    if ($password !== '') $this->password = $password;
+    $this->authType = 'Basic';
+    return $this;
+  }
+
+  /**
+   * トークン認証の資格情報を設定する
+   *
+   * @param string $token  セッショントークン
+   * @return Curl  このインスタンス（メソッドチェーン用）
+   */
+  public function setBearerAuth(string $token = ''): Curl {
+    if ($token !== '') $this->token = $token;
+    $this->authType = 'Bearer';
+    return $this;
+  }
+
+  /**
+   * 認証を取りけソ
+   *
+   * @return Curl  このインスタンス（メソッドチェーン用）
+   */
+  public function unsetAuth(): Curl {
+    $this->username = '';
+    $this->password = '';
+    $this->token = '';
+    $this->authType = '';
     return $this;
   }
 
@@ -300,14 +331,16 @@ class Curl {
         $path .= '?'.$parsed['query'];
       }
 
-      // Basic認証
+      // 認証
       $authHeader = '';
-      if (!empty($this->username) && !empty($this->password)) {
+      if (!empty($this->authType) && $this->authType === 'Basic') {
+        assert_not_null($this->username);
+        assert_not_null($this->password);
         $authHeader = "Authorization: Basic "
           .base64_encode($this->username.':'.$this->password)."\r\n";
-      } elseif (isset($parsed['user']) && isset($parsed['pass'])) {
-        $authHeader = "Authorization: Basic "
-          .base64_encode($parsed['user'].':'.$parsed['pass'])."\r\n";
+      } else if (!empty($this->authType) && $this->authType === 'Bearer') {
+        assert_not_null($this->token);
+        $authHeader = "Authorization: Bearer ".$this->token."\r\n";
       }
 
       // 送信するHTTPリクエストを構築
@@ -368,6 +401,8 @@ class Curl {
         $request .= $httpData;
       }
 
+      $this->DEBUG_REQ_HDR = $request;
+
       if ($this->verbose && $this->stderr) {
         fwrite($this->stderr, "* リクエストヘッダー:\n{$request}\n");
       }
@@ -573,6 +608,15 @@ class Curl {
     return $this->info;
   }
 
+  /**
+   * リクエスト情報を取得する
+   *
+   * @return string  情報の配列
+   */
+  public function getRequestHeader(): string {
+    return $this->DEBUG_REQ_HDR;
+  }
+
   // 機能性メソッド
 
   /**
diff --git a/src/Std/Lib/Openprovider.php b/src/Std/Lib/Openprovider.php
new file mode 100644
index 0000000..51a9a66
--- /dev/null
+++ b/src/Std/Lib/Openprovider.php
@@ -0,0 +1,302 @@
+<?php
+namespace Std\Lib;
+
+use Std\Lib\Curl;
+
+class Openprovider {
+  private string $user;
+  private string $pass;
+  private string $token;
+  private string $ip;
+  private int $reseller_id;
+  private string $BASEURL = 'https://api.openprovider.eu/v1beta';
+  // private Curl $curl;
+
+  public function __construct() {
+    if (!OPENPROVIDER_ENABLED) return;
+    $this->user = OPENPROVIDER['username'];
+    $this->pass = OPENPROVIDER['password'];
+    $this->ip = OPENPROVIDER['ip'];
+  }
+
+  /***
+   * トークンの受け取り。
+   * このライブリリーを使ったら、一回「login()」を実行する事が必須となります。
+   * 
+   * @return Result  結果
+   */
+  public function login(): \Result {
+    $curl = new Curl("{$this->BASEURL}/auth/login");
+
+    $payload = [
+      'username' => $this->user,
+      'password' => $this->pass,
+      'ip' => $this->ip ?: '0.0.0.0',
+    ];
+
+    $curl->setMethod("POST");
+    $curl->setPostRaw(json_encode($payload));
+    $curl->addHeader("Content-Type", "application/json");
+    $curl->addHeader("Accept", "application/json");
+
+    $res = $curl->execute();
+    if (!$res->isSuccess) {
+      $err = "CURLの実行に失敗： ".$curl->message;
+      assert_unless_success($res, $err);
+      return \Result::Error($err);
+    }
+
+    $body = $curl->getResponseBody();
+    if ($curl->getResponseCode() != 200) {
+      $err = json_decode($body, true);
+      assert_not_null($err, "エラーの受け取りに失敗。");
+      assert($curl->getResponseCode() == 200, $err['desc']);
+      return \Result::Error();
+    }
+    assert_not_null($body, "返事ボディーは空です。");
+
+    $data = json_decode($body, true);
+    if (isset($data['data']['token'])) {
+      $this->token = $data['data']['token'];
+      $this->reseller_id = $data['data']['reseller_id'];
+      return \Result::Success();
+    }
+
+    return \Result::Error("ログインに失敗。");
+  }
+
+  // カスタマー
+
+  // ドメイン
+
+  //// ドメイン
+
+  /***
+   * ドメインを登録可能かどうかの確認。
+   * 
+   * @param array $domains  ドメイン名リスト。例：['076.moe', '076.co.jp', '076.com']
+   * @param bool $with_price  値段を表示するかどうか。デフォルトは「false」
+   * @return Result|array  結果。配列の場合：'domain'と'status'はいつでもあり、'reason', 'premium', 'is_premium'が多分あり、そして'price'が「with_price」が「true」の場合のみ。
+   */
+  public function checkDomainAvailable(array $domains, bool $with_price = false): \Result|array {
+    $domainList = [];
+    foreach ($domains as $d) {
+      $domain = explode('.', $d);
+      assert_exists($domain[0]);
+      assert_exists($domain[1]);
+      if (count($domain) !== 2) {
+        return \Result::Error("不正なドメイン形： {$d}");
+      }
+
+      $domainList[] = [
+        'name' => $domain[0],
+        'extension' => $domain[1],
+      ];
+    }
+
+    $payload = [
+      'domains' => $domainList,
+      'with_price' => $with_price,
+    ];
+
+    $curl = $this->setupCurl('/domains/check', 'POST', $payload);
+    $data = $this->curlResult($curl);
+    if (isset($data['data']['results'])) return $data['data']['results'];
+
+    return \Result::Error("ドメインの確認に失敗。");
+  }
+
+  /**
+   * ドメイン名の登録。
+   * 
+   * @param string $name  登録したいドメイン名（例："076studio.jp"）
+   * @param int $period  年間（デフォルト＝１年）
+   * @param string $owner_handle
+   * @param string $admin_handle
+   * @param string $tech_handle
+   * @param string $billing_handle
+   * @param string $reseller_handle
+   * @param array $name_servers  ネームサーバー（４つまで、デフォルトはOpenProviderさんのネームサーバー）
+   * @param string $autorenew  自動的に更新するかどうか（可能な値：on|off|default、デフォルト＝default）
+   * @return Result|array  結果。配列の場合：'activation_date'（リアルタイムで成功したのみ）, 'auth_code'（TLDが対応している場合のみ）, 'expiration_date', 'id', 'renewal_date', 'status'（ACT又はREQ）
+   */
+  public function registerDomain(string $name, int $period = 1, string $owner_handle = '',
+                                 string $admin_handle = '', string $tech_handle = '',
+                                 string $billing_handle = '', string $reseller_handle = '',
+                                 array $name_servers = [], string $autorenew = 'default'): \Result|array {
+    if ($owner_handle === '') $owner_handle = OPENPROVIDER['owner_handle'];
+    if ($admin_handle === '') $admin_handle = $owner_handle;
+    if ($tech_handle === '') $tech_handle = $owner_handle;
+    if ($billing_handle === '') $billing_handle = $owner_handle;
+    if ($reseller_handle === '') $reseller_handle = $owner_handle;
+
+    $parts = explode('.', $name, 2);
+    assert_exists($parts[0]);
+    assert_exists($parts[1]);
+    $domain = [
+      'name' => $parts[0],
+      'extension' => $parts[1],
+    ];
+
+    $ns = [];
+    if (empty($name_servers)) $name_servers = ['ns1.openprovider.nl', 'ns2.openprovider.be', 'ns3.openprovider.eu'];
+    foreach ($name_servers as $n) {
+      $ns[] = ['name' => $n];
+    }
+
+    $payload = [
+      'name' => $domain,
+      'period' => $period,
+      'owner_handle' => $owner_handle,
+      'admin_handle' => $admin_handle,
+      'tech_handle' => $tech_handle,
+      'billing_handle' => $billing_handle,
+      'reseller_handle' => $reseller_handle,
+      'name_servers' => $ns,
+      'autorenew' => $autorenew,
+    ];
+
+    $curl = $this->setupCurl('/domains/', 'POST', $payload);
+    kys('TODO');
+    $data = $this->curlResult($curl);
+    if (isset($data['data'])) return $data['data'];
+
+    return \Result::Error("ドメインの確認に失敗。");
+  }
+
+  //// 追加データ
+
+  //// 顧客様の追加データ
+
+  /**
+   * 顧客様の検索
+   * @param array $query  検索クエリー（可能：handle_pattern (string), email_pattern (string), first_name_pattern (string), last_name_pattern (string), company_name_pattern (string), comment_pattern (string), with_additional_data (bool), limit (int = 100、最大＝1000), offset (int = 0）
+   */
+  public function searchCustomers(array $query = []): \Result|array {
+    foreach ($query as $k => $v) { if (is_bool($v)) $query[$k] = $v ? '1' : '0'; }
+
+    $uri = '/customers?'.http_build_query($query, '', '&', PHP_QUERY_RFC3986);
+    $curl = $this->setupCurl($uri);
+    kys("TODO: 問題");
+    $data = $this->curlResult($curl);
+    kys($data);
+    if (isset($data['data'])) return $data['data'];
+
+    return \Result::Error("TLD一覧の受け取りに失敗。");
+  }
+
+  //// ドメイン値段
+
+  //// 認証コード
+
+  //// TLD
+
+  /**
+   * TLD一覧
+   * 
+   * @param array $query  検索クエリー（可能：limit (int),offset (int),order (string),order_by (string),extensions(array), name_pattern (string), only_names (bool), with_description (bool),with_restrictions (bool)with_usage_count (bool)with_application_mode (bool),with_price (bool),with_level_prices (bool)is_active (bool)is_new_gtld (bool),status (string),application_mode (string)）
+   */
+  public function listTlds(array $query = []): \Result|array {
+    if (empty($query)) $query = [ 'limit' => 10, 'offset' => 0, 'order' => 'ASC' ];
+
+    foreach ($query as $k => $v) {
+      if (is_bool($v)) $query[$k] = $v ? '1' : '0';
+    }
+
+    $uri = '/tlds?'.http_build_query($query, '', '&', PHP_QUERY_RFC3986);
+    // kys($uri);
+    $curl = $this->setupCurl($uri);
+    kys("TODO: JSONの問題");
+    $data = $this->curlResult($curl);
+    kys($data);
+    if (isset($data['data'])) return $data['data'];
+
+    return \Result::Error("TLD一覧の受け取りに失敗。");
+  }
+
+  /**
+   * TLDの受け取り
+   */
+
+  // 請求
+  //// 請求書
+  //// 支払
+  //// トランザクション
+
+  // DNS
+  //// DomainToken
+  //// ネームサーバー
+  //// NSグループ
+  //// テンプレート
+  //// ゾーン
+  //// ゾーンレコード
+
+  // Easydmarc
+
+  // ライセンス
+
+  // リセラー・顧客様
+
+  // SpamExpert
+
+  // SSL証明書
+
+  ////////
+
+  /**
+   * トークンの受け取り。
+   * 
+   * @return string  トークン
+   */
+  public function getToken(): string {
+    return $this->token;
+  }
+
+  /**
+   * リセラーIDの受け取り。
+   * 
+   * @return int  リセラーID
+   */
+  public function getResellerId(): int {
+    return $this->reseller_id;
+  }
+
+  //////////
+
+  private function setupCurl(string $uri, string $resType = 'GET', array $payload = []): Curl {
+    $curl = new Curl("{$this->BASEURL}{$uri}");
+
+    $curl->setMethod($resType);
+    if (!empty($payload)) $curl->setPostRaw(json_encode($payload));
+    $curl->setBearerAuth($this->token);
+    $curl->addHeader('Content-Type', 'application/json');
+    $curl->addHeader('Accept', 'application/json');
+
+    return $curl;
+  }
+
+  private function curlResult(Curl &$curl): \Result|array {
+    $res = $curl->execute();
+    // kys($curl->getRequestHeader());
+    if (!$res->isSuccess) {
+      $err = "CURL実行に失敗： {$curl->message}";
+      assert_unless_success($res, $err);
+      return \Result::Error($err);
+    }
+
+    $body = $curl->getResponseBody();
+    // kys($body);
+    // kys($curl->getResponseHeaders());
+    if ($curl->getResponseCode() != 200) {
+      $err = json_decode($body, true);
+      assert_not_null($err, "エラーの受け取りに失敗。");
+      assert($curl->getResponseCode() == 200, $err['desc']);
+      return \Result::Error();
+    }
+    assert_not_null($body, "返事ボディーは空です。");
+
+    // $body = str_
+    kys($body);
+    return json_decode($body, true);
+  }
+}
\ No newline at end of file
diff --git a/src/Std/Test/LibMarkdown.php b/src/Std/Test/LibMarkdown.php
index 562f840..39570a8 100644
--- a/src/Std/Test/LibMarkdown.php
+++ b/src/Std/Test/LibMarkdown.php
@@ -35,7 +35,6 @@ class Constants {
 }
 
 $test->describe('マークダウン', function($test): void {
-
   $test->it('メタデータをパーシング出来るはず', function($test): void {
     $md = new Markdown('feature-test', '/blog/');
     $test->assertNotNull($md);
diff --git a/src/Std/Test/LibOpenprovider.php b/src/Std/Test/LibOpenprovider.php
new file mode 100644
index 0000000..8d1fe94
--- /dev/null
+++ b/src/Std/Test/LibOpenprovider.php
@@ -0,0 +1,62 @@
+<?php
+namespace Std\Test;
+
+require_once __DIR__.'/../../../autoload.php';
+
+use Std\Lib\Tester;
+use Std\Lib\Openprovider;
+
+$test = new Tester([
+  'colorOutput' => true,
+  'verboseOutput' => true
+]);
+
+$test->describe('認証', function($test): void {
+  $test->it('トークンを受け取れるはず', function($test): void {
+    $op = new OpenProvider();
+    $res = $op->login();
+
+    $expect = Res::Success();
+    $test->assertEquals($expect, $res);
+  });
+
+  $test->it('トークンを受け取れるはず', function($test): void {});
+});
+
+$test->describe('ドメイン', function($test): void {
+  $test->it('ドメイン名があるかのうか確認出来るはず', function($test): void {
+    $op = new OpenProvider();
+    $op->login();
+    $res = $op->checkDomainAvailable(['076.moe', '076.xxx', '076.nigger']);
+
+    $expect = [
+      0 => [
+        'domain' => '076.nigger',
+        'status' => 'active',
+        'reason' => 'Your domain request contains an invalid extension!',
+      ],
+      1 => [
+        'domain' => '076.moe',
+        'status' => 'active',
+        'reason' => 'In use',
+      ],
+      2 => [
+        'domain' => '076.xxx',
+        'status' => 'free',
+      ],
+    ];
+    $test->assertEquals($expect, $res);
+  });
+  
+  $test->it('ドメイン名（値段付き）があるかのうか確認出来るはず', function($test): void {
+    $op = new OpenProvider();
+    $op->login();
+    $res = isset($op->checkDomainAvailable(['076.moe'], true)[0]['price']['product']);
+
+    $expect = true;
+    $expect = Res::Success();
+    $test->assertEquals($expect, $res);
+  });
+});
+
+$test->printSummary();
\ No newline at end of file
diff --git a/util.php b/util.php
index 32fbda7..a39a4f2 100644
--- a/util.php
+++ b/util.php
@@ -268,6 +268,13 @@ function randstr(): string {
   return bin2hex(random_bytes($len));
 }
 
+function assert_exists(mixed $assertion, Throwable|string|null $description = null): bool {
+  if (ini_get('zend.assertions') < 1) trigger_error('assert機能性が無効です。有効するには、php.iniで「zend.assertions = 1」に設定して下さい。', E_USER_WARNING);
+  if (isset($assertion)) return true;
+  assert(false, $description ?? 'Assertion failed: value is not null');
+  return false;
+}
+
 function assert_null(mixed $assertion, Throwable|string|null $description = null): bool {
   if (ini_get('zend.assertions') < 1) trigger_error('assert機能性が無効です。有効するには、php.iniで「zend.assertions = 1」に設定して下さい。', E_USER_WARNING);
   if (is_null($assertion)) return true;