HTTP API vs REST API in AWS API Gateway — Simplified for Beginners

When you’re building a web or mobile app using AWS services, one of the most common questions that comes up is:

Which one should I use: HTTP API or REST API in API Gateway?

Both can be used to expose your backend to the internet. However, there are key differences in features, cost, and use cases. This article explains everything in simple terms for beginners and developers new to cloud.

What is API Gateway?

API Gateway is a service by AWS that helps you create and manage APIs to connect your frontend (like a website or app) with backend services (like Lambda, EC2, or DynamoDB).

AWS offers two main types of APIs:

• HTTP API
• REST API

Let’s break down the difference between these two.

Key Differences Between HTTP API and REST API

Simple Explanation

HTTP API

HTTP APIs are built for speed and simplicity. If you’re building a basic web or mobile app and only need to trigger Lambda functions or call HTTP endpoints, HTTP API is the better option. It’s cheaper and easier to set up.

Use it when:

• You want to build and deploy APIs quickly
• You don’t need advanced features like caching or API keys
• You’re focused on cost savings

REST API

REST APIs are more powerful and come with advanced features like caching, request/response mapping, throttling, and usage plans. They are useful when you need greater control over how your API behaves.

Use it when:

• You need request validation or transformation
• You want to implement usage plans with API keys
• Your app uses advanced AWS service integrations

Cost Example (as of April 2025)

Let’s compare costs for 1 million API requests per month:

Which One Should You Use? based on scenario

Final Thoughts

Choose HTTP API when you’re starting a new project and want to keep things simple and fast. It’s perfect for most use cases and keeps your AWS bill low.

Choose REST API when your application requires more control, request/response customization, or you need enterprise-level features.

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Sam Atmaramani