Google’s TokenInfo Endpoint

Google’s endpoint for the Check ID step of OpenID Connect can be used to validate any OAuth 2.0 token issued by Google. The endpoint at https://www.googleapis.com/oauth2/v1/tokeninfo is a simple read-only API. To get the scope and expiration date of a token, make a HTTP request to the endpoint and pass an OAuth access token as the access_token query parameter or an ID token as the id_token parameter.

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