Google APIs Terms of Service

When using the APIs, you may not (or allow those acting on your behalf to):

Sublicense an API for use by a third party. Consequently, you will not create an API Client that functions substantially the same as the APIs and offer it for use by third parties.

APIを第三者が実質的に十全に利用することのできるラッパーを作成することはできない

When a user's non-public content is obtained through the APIs, you may not expose that content to other users or to third parties without explicit opt-in consent from that user.

ユーザーの同意なしにプライベートデータを公開してはいけない

Unless expressly permitted by the content owner or by applicable law, you will not, and will not permit your end users or others acting on your behalf to, do the following with content returned from the APIs:

Scrape, build databases, or otherwise create permanent copies of such content, or keep cached copies longer than permitted by the cache header;

ユーザーの同意がない限り、キャッシュやコピーはヘッダーで指定されたよりも長く保持してはならない

Misrepresent the source or ownership; or

ソースや所有者を偽ってはならない