While you can use Dialogflow by making direct REST over HTTP requests, we provide client libraries for several popular languages.
Google Cloud Client Libraries
Dialogflow client libraries are built on Google Cloud Client Libraries. This common infrastructure provides functionality for API-specific library implementations, but it also provides types and methods that you may use directly when using any Cloud API.
Authentication and access control
The Dialogflow quickstart guides provide basic information on authentication and access control. For more detailed information, see the following:
Dialogflow provides client libraries and guides for the following languages: