Next.js API Routes vs Server Actions: When to Use Each
Understand the differences between Next.js API Routes and Server Actions, and learn when to choose each approach for your application.
Abdur Razzak
Full-Stack Web Developer
Two Ways to Run Server Code in Next.js
Next.js gives you two primary ways to run server-side code: API Routes (files in the app/api directory that export HTTP handlers) and Server Actions (functions marked with "use server" that run on the server but are called from client components like regular functions). Both execute on the server, but they have different strengths and are suited to different use cases.
API Routes: When to Use Them
API Routes create actual HTTP endpoints that any client can call — your React frontend, a mobile app, a third-party service, or a webhook. Use API Routes when you need a public or semi-public API, when you need to receive webhooks from services like Stripe or GitHub, when you need specific HTTP methods and headers, or when other applications need to consume the same endpoint.
Server Actions: When to Use Them
Server Actions: When to Use Them
Server Actions are ideal for form submissions and mutations that only your Next.js frontend needs to trigger. They integrate directly with React forms using the action prop, work with useActionState for loading and error states, and require no separate API endpoint. They are perfect for user-facing operations like creating a blog post, updating a profile, or submitting a contact form.
Performance and Security Considerations
Server Actions are co-located with your components, which makes them easier to maintain but also means they are always tied to your Next.js deployment. API Routes can be deployed to edge runtimes for lower latency globally. For sensitive operations, Server Actions automatically handle CSRF protection by verifying the request origin. API Routes require manual CSRF protection or authentication middleware.
My Recommendation for Projects
For most full-stack Next.js projects, I use Server Actions for form submissions and CRUD operations within the app, and API Routes for webhooks, third-party integrations, and any endpoint that needs to be consumed by non-Next.js clients. This hybrid approach gives you the developer experience benefits of Server Actions for internal operations while maintaining proper HTTP endpoints for external integrations.
