Official Google Google OAuth2 API REST API. Discovery document: https://www.googleapis.com/discovery/v1/apis/oauth2/v2/rest. Documentation: https://developers.google.com/accounts/docs/OAuth2.
Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Strong candidate; weakest signal is OpenAPI availability.