WPGraphQL

WPGraphQL is a free, open-source WordPress plugin that provides an extendable GraphQL schema and API for any WordPress site.

Below are some links to help you get started with WPGraphQL

Install

Follow the WPGraphQL Quick Start instructions to install and activate WPGraphQL Details here

Special thanks to Gatsby and WPEngine for allocating development resources to push the project forward!
This plugin brings the power of GraphQL (http://graphql.org/) to WordPress.
The plugin is built on top of the graphql-php library by Webonyx (https://github.com/webonyx/graphql-php) and makes use of the graphql-relay-php library by Ivome (https://github.com/ivome/graphql-relay-php/)
Some of the concepts and code are based on the WordPress Rest API. Much love to the folks (https://github.com/orgs/WP-API/people) that put their blood, sweat and tears into the WP-API project, as it's been huge in moving WordPress forward as a platform and helped inspire and direct the development of WPGraphQL.
Much love to Facebook® for open sourcing the GraphQL spec (https://facebook.github.io/graphql/), the amazing GraphiQL dev tools (https://github.com/graphql/graphiql), and maintaining the JavaScript GraphQL reference implementation (https://github.com/graphql/graphql-js)
Much love to Apollo (Meteor Development Group) for their work on driving GraphQL forward and providing a lot of insight into how to design GraphQL schemas, etc. Check them out: http://www.apollodata.com/