Single endpoint architecture in GraphQL

Introduction

A single endpoint architecture means using one URL to handle all data requests. This makes it easier to manage and update data in one place.

When building a website that needs to get different types of data from one place.

When you want to reduce the number of URLs your app talks to, making it simpler.

When you want to give users flexible ways to ask for exactly the data they need.

When you want to improve performance by avoiding multiple network requests.

When you want to keep your backend organized and easier to maintain.

Syntax

GraphQL

query {
  fieldName(parameters) {
    subField1
    subField2
  }
}

All data requests go to the same URL, usually '/graphql'.

You specify what data you want inside the query, so the server returns only that.

Examples

Fetches the name and email of the user with ID 1 from the single GraphQL endpoint.

GraphQL

query {
  user(id: "1") {
    name
    email
  }
}

Fetches the title and price of the product with ID 5 using the same single endpoint.

GraphQL

query {
  product(id: "5") {
    title
    price
  }
}

Fetches both user name and product title in one request to the single endpoint.

GraphQL

query {
  user(id: "1") {
    name
  }
  product(id: "5") {
    title
  }
}

Sample Program

This query asks the single GraphQL endpoint for the title of the book with ID 10 and the name of its author.

GraphQL

query {
  book(id: "10") {
    title
    author {
      name
    }
  }
}

Important Notes

Using a single endpoint helps reduce confusion about where to send requests.

Clients can ask for exactly what they need, no more and no less.

It can simplify security and caching because all requests go through one place.

Summary

Single endpoint architecture uses one URL for all data queries.

It makes data fetching flexible and efficient.

It simplifies backend management and client requests.