### 共通の呼び出しパターン
1. OAuth2 APIを呼び出してアクセストークンを取得します。
2. 対象のD1 APIを次のヘッダーで呼び出します `Authorization: Bearer `.
3. トークンは有効期限（15分）まで再利用してください。
{% hint style="info" %}
インバウンドとアウトバウンドの両方の接続にはmTLSが必要です。
OAuth 2.0アクセストークンはインバウンド呼び出し（イシュアバックエンドからD1バックエンドへ）のみ適用されます。
{% endhint %}
---
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