What is GraphQL? GraphQL is an open‑source query language for APIs and a server‑side runtime. It provides a strongly‑typed schema to define relationships between data, making APIs more flexible …

In this tutorial-style introduction to GraphQL, you'll learn the core concepts that power every GraphQL API. Follow a step-by-step path from basic queries to advanced features.

GraphQL supports three main operation types—queries, mutations, and subscriptions. We have already seen several examples of basic queries in this guide, and on this page, you’ll learn in detail how to …

There are many resources available to help you learn GraphQL, including this website. In our documentation, you’ll find a series of articles that explain essential GraphQL concepts and how they …

GraphQL allows you to add documentation to the types, fields, and arguments in a schema. In fact, the GraphQL specification encourages you to do this in all cases unless the name of the type, field, or …

The reference implementation of the GraphQL specification, designed for running GraphQL in a Node.js environment.

This guide outlines common HTTP and GraphQL errors, what they mean, and how to debug them effectively. It follows the recommendations of the GraphQL over HTTP spec (draft), which …

GraphQL was introduced at a React conference and GraphQL.js is one of the most widely used implementations to date. We know this can be confusing, so we’re working to improve our …

Some articles introduce some of the philosophy developed within Facebook around designing and deploying GraphQL services, while others are more tactical suggestions for solving common …

Now that you understand the different phases of a GraphQL request and how responses are provided to clients, head over to the Introspection page to learn about how a GraphQL server can query …