{"endpoint":"a2a_book","status":"active","version":"2.7.0","method":"POST","description_ja":"予約を仮作成し checkout_url を返します。POST 専用です。","required_headers":{"x-api-key":"必須（Wix Secrets Manager）","Content-Type":"application/json"},"body_template":{"service_wix_id":"string (カタログの wix_service_id)","start_date":"ISO8601 (例: 2026-02-19T09:00:00+09:00)","end_date":"ISO8601 (例: 2026-02-19T10:00:00+09:00)","contact":{"firstName":"string","lastName":"string","email":"string","phone":"string (任意)"}},"alternative":{"description_ja":"API予約が不要な場合は a2a_booking_link で予約フォームURLを直接取得できます","endpoint":"https://www.hsworking.com/_functions/a2a_booking_link"},"note":"GET でアクセスされたため使い方を返しています。"}