Next.js development
Create a mock REST API for a Next.js app
Build shared REST endpoints for Next.js development without coupling every prototype to temporary Route Handlers or local fixture files.
What this workflow solves
Go from idea to a stable HTTP contract without building every backend layer first.
Next.js can host its own backend logic, but not every prototype should start by implementing and maintaining temporary Route Handlers. NexApi gives you a separate REST contract that Server Components, Client Components, Server Actions, tests, and external consumers can all call.
Keep frontend experimentation separate from temporary backend code.
Use one shared API across browser, server, and external test clients.
Model auth and validation behavior before the final backend architecture is fixed.
Inspect HTTP requests outside the Next.js application itself.
How it works
A short path from data model to usable endpoint.
Define the resource
Create the response contract and representative records in NexApi.
Publish the route
Use a stable path that resembles the API your application will ultimately consume.
Call it from Next.js
Fetch the endpoint from server or client code according to your application's caching and security needs.
Replace or evolve later
Keep the HTTP contract stable while you move the data source or implementation forward.
const res = await fetch(
"https://nexapi.run/r/demo/products",
{ cache: "no-store" }
);{
"data": [
{ "id": "p_1", "name": "Starter", "price": 9 },
{ "id": "p_2", "name": "Pro", "price": 29 }
]
}Fetch from a Server Component
NexApi behaves like an external REST service, which is useful when you want to test that integration boundary early.
Built into NexApi
The API operations layer is already there.
Start small, then add the controls normally scattered across backend code, gateway config, webhook workers, and observability tools.
Visual endpoint builder
Configure methods, paths, request schemas, and response mappings from one interface.
API keys and access
Add API-key based access rules and keep public endpoints under control.
Rate limits and caching
Apply endpoint-level runtime controls without rebuilding the surrounding backend.
Webhooks and connectors
Connect REST APIs with Google Sheets, Slack, Discord, webhooks, Postgres, MySQL, and external REST APIs.
OpenAPI output
Keep the API contract consumable by documentation and developer tooling.
Logs and analytics
Inspect requests and usage from the same dashboard used to configure the API.
Good fit for
Teams that want to ship the API contract first.
Frequently asked
Why not just create a Next.js Route Handler?
That is a good option when the route belongs permanently inside the Next.js app. NexApi is useful when you want a shared, framework-independent API contract with its own keys, logs, analytics, connectors, webhooks, and OpenAPI output.
Can Server Components call NexApi?
Yes. Server Components can make HTTP requests to published endpoints just like other server-side code.
Can I later use the same API from a mobile app?
Yes. The API is not tied to Next.js, so other HTTP clients can reuse it.
Build it in NexApi
Turn this use case into a working endpoint.
Start with the contract you need now, then add keys, connectors, webhooks, analytics, and OpenAPI as the project grows.