我相信您可以使用 API Key 函数(它不是 OAuth 2 密钥)来访问 CSE api.

I believe you can use the API Key function (which is not an OAuth 2 key) to access CSE apis.

这是文档.https://developers.google.com/custom-search/v1/using_rest?hl=en

API 密钥是否有任何原因不起作用而您需要 OAuth2?

Is there some reason the API key doesn't work and you need OAuth2?