Use GraphQL protocol

Out-of-the-box implementation of GraphQL protocol is available as of Sitefinity CMS version 14.2.  
The GraphQL protocol is integrated with the existing user interface for managing RESTful API services in Sitefinity CMS.

GraphQL is not included in the default installation of Sitefinity CMS. It is distributed as an optional package, which implements the integration. To enable and set up GraphQL, perform the following:

1. Download Progress.Sitefinity.GraphQL NuGet package from Sitefinity CMS NuGet packages repository.
   The NuGet package is in prerelease state, so make sure that you filter by prerelease packages.
2. Install the package in your Sitefinity CMS project.
3. Build and run your project.
   

You must create a new web service by following procedure Create a RESTful API service.

After creating a web service, you can browse the schema of the Sitefinity GraphQL service (api/{urlofservice}/graphql) using third-party tools like:

• GraphiQL explorer
• Postman
  

For information about using GraphiQL explorer, see GraphiQL explorer example on GitHub.
For information about using Postman, see Postman documentation » Querying with GraphQL.

NOTE: When using third-party tools that have a web interface, make sure to set the Allow access from other domains property of the web service (enables CORS). 

The GraphQL protocol implementation in Sitefinity CMS only supports queries. Mutations are currently not supported.