A

Accelerated Mobile Pages (AMP) URL API

REST discovered

Details
URL
https://acceleratedmobilepageurl.googleapis.com/
Docs
https://developers.google.com/amp/cache/
Authentication
Google API key api_key discovered Get key ↗
?key=<credential>

In Google Cloud Console Credentials, create an API key for your project, then enable the relevant API/quota in your Google Cloud project. Send it as the key query parameter.

Google OAuth 2.0 access token oauth2 discovered Set up OAuth ↗
Authorization: Bearer <credential>

In Google Cloud Console Credentials, create an OAuth client for your Google Cloud project, then obtain a Google OAuth 2.0 access token using Google's standard OAuth flow. Use the resulting token with Google APIs as an OAuth 2.0 bearer token; this API's discovery document says an API key is required unless you provide an OAuth 2.0 token.