GraphQL vs REST API: Choosing the Right Approach

REST and GraphQL solve the same fundamental problem — letting a client fetch data from a server — with very different trade-offs. Neither is universally "better"; the right choice depends on your actual client needs.

REST: Resources and Fixed Shapes

GET /api/posts/1          → returns the full Post object, every field
GET /api/posts/1/comments → returns all comments for that post

Each endpoint returns a fixed shape. A mobile app that only needs a post's title and author still receives every field the server defines — simple to cache (HTTP caching works natively per-URL) but often over-fetches data the client doesn't need, or under-fetches, requiring several round trips for related data.

GraphQL: One Endpoint, Client-Specified Shape

query {
  post(id: 1) {
    title
    author { name }
    comments(limit: 5) { body author { name } }
  }
}

One request, exactly the fields asked for, including nested relationships — no over-fetching, no separate round trip for comments. The trade-off: HTTP caching doesn't work the normal way (every request is a POST to the same /graphql URL), so caching needs its own dedicated layer (Apollo Client's cache, or a server-side solution like a persisted-query cache).

The N+1 Problem Exists in Both

// Naive GraphQL resolver — fires one query PER post for its author
const resolvers = {
  Post: {
    author: (post) => db.users.findById(post.authorId), // N+1!
  },
};

GraphQL's flexible nested queries make N+1 easy to introduce accidentally. The standard fix is DataLoader — it batches all the individual author lookups requested within one tick into a single WHERE id IN (...) query.

When REST Is the Better Choice

• A simple CRUD API with one or two client types (a single web app, for example)
• You want to lean on standard HTTP caching (CDNs, browser cache) with minimal extra tooling
• Your team is more familiar with REST conventions and the added GraphQL tooling isn't worth the learning curve for this project's size

When GraphQL Is the Better Choice

• Multiple client types with genuinely different data needs (a mobile app needing a lean payload, a web dashboard needing deep nested data)
• A complex, deeply nested data graph where REST would otherwise require many sequential round trips
• A large API where different frontend teams need to evolve independently without waiting on new REST endpoints

The Honest Answer

For most small-to-medium applications with one primary client, a well-designed REST API (with actual API Resources controlling exactly what's returned, as covered in the Laravel API guide) is simpler to build, cache, and reason about. GraphQL earns its added complexity specifically when multiple diverse clients are querying a genuinely complex data graph.