SDLC Automation | Postman's AI-Native API Platform

For a small app, REST is usually the simpler choice. GraphQL becomes attractive when your frontend needs to request lots of different shapes of data.

	REST	GraphQL
How you request data	Multiple URLs/endpoints	Usually one endpoint with a query
Data shape	Server decides the response	Client specifies the fields it wants
Example	GET /users/123	Query user(id: 123) { name email }
Over/under-fetching	More common	Much less common
Caching	Straightforward HTTP caching	More complicated
Setup	Simple	More infrastructure/schema/tooling
Learning curve	Low	Higher
Best fit	CRUD apps, simple APIs	Complex UIs, many related data needs

Practical example

Suppose you're building a small blog.

With REST, you might have:

GET /posts/42
GET /posts/42/comments
GET /users/7

Your frontend may need three requests to construct one screen.

With GraphQL, you could request everything needed in one query:

query {
  post(id: 42) {
    title
    body
    author {
      name
    }
    comments {
      text
      author {
        name
      }
    }
  }
}

The advantage is the client gets almost exactly what it needs.

The catch

GraphQL isn't simply "REST but better." You take on additional complexity:

• Designing and maintaining a schema
• Query validation and authorization
• Handling caching
• Preventing expensive/deep queries
• More tooling and concepts for developers to learn

For a small app, that complexity often isn't worth it.

My rule of thumb

Choose REST if:

• You have a relatively simple CRUD application.
• You control both frontend and backend.
• Your resources map naturally to URLs.
• You want the simplest deployment and debugging experience.

Choose GraphQL if:

• You have a complex frontend with many different screens needing different data.
• Your data has lots of relationships.
• You expect multiple clients (web, mobile, etc.) with substantially different data requirements.
• Avoiding multiple API requests is genuinely becoming a problem.

For a typical small app I'd start with REST. If the API becomes awkward because every new screen requires new endpoints or lots of client-side requests, that's a good signal to consider GraphQL.