No browser clients for web apps, especially native mobile apps running on smartphones and tablets, are also increasingly important. Both kinds of clients tend to use REST (Representational State Transfer) APIs pro‐ vided by the web app, and tend to need advanced features such as OAuth for authen‐ ticating calls.
The tools can also generate a “discovery document” that works with the Google APIs Cli‐ ent Libraries for many client languages. And OAuth support is built in, so you don’t have to worry about authentication and can just focus on the application logic.
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