# Instant mock API

> Pick a resource, get a live-feeling endpoint.

Instant mock API spins up a live endpoint that serves realistic JSON for a common resource — pick users, products, orders or posts and get a URL you can call right away, with no account and no backend to run.

Also: mock api, mock api online, mock rest api, dummy api for testing, mock json api, instant api, fake api, fake json api, sample rest api, no signup mock api.

## What it does

Front-end and integration work often stalls waiting for a real API to exist. This tool creates a real, hosted mock endpoint in one click: choose a resource and it returns believable sample records in the shape that resource usually takes. The endpoint answers real HTTP requests for 24 hours, so you can build and demo against a stable URL instead of hard-coding a fixture.

## When to use it

- You are building a UI and the real API is not ready yet.
- You need a stable endpoint returning realistic JSON to prototype or demo against.
- You want to check how your client renders a list or a single record without standing up a server.
- You need a throwaway URL to share a sample response with a teammate.

## What you give it

| Input | Meaning |
| --- | --- |
| Resource | The kind of data to serve — user, product, order or post. Each returns realistic sample records for that resource. |
| Name | Optional subdomain for the mock URL. Leave it blank and one is generated for you. |

## What you get back

| Output | Meaning |
| --- | --- |
| Live mock URL | A hosted endpoint that serves the sample JSON over real HTTP for 24 hours. |
| Response preview | The exact JSON the endpoint returns, shown before you call it so there are no surprises. |

## Key terms

- **Mock server** — a stand-in endpoint that returns canned responses in place of a real backend, so client code can be built and tested before the API exists.
- **Resource** — a named collection an API exposes — users, products, orders — each with a conventional record shape the mock reproduces.

## Questions

### Do I need an account?

No. The mock is created anonymously and is live immediately.

### How long does the endpoint last?

It answers for 24 hours, then expires.

### Is it a real endpoint or just a preview?

A real one. It is a hosted mock server that responds to actual HTTP requests — the preview just shows you the body it will return.

### Can I control the response?

Pick from the built-in resources — user, product, order or post — each serving realistic sample records for that type.


## Privacy

The response comes from built-in sample data, so nothing you type is uploaded beyond the configuration needed to create the mock. The endpoint is public and unauthenticated by design — treat it as throwaway and never point it at real data.

## Links

- [Use the tool](https://www.postman.com/tools/instant-mock-api) — the interactive version of this page.
- [Postman Tools](https://www.postman.com/tools) — every free tool in this set.
- [Mock Servers docs](https://learning.postman.com/docs/design-apis/mock-servers/overview/) — Postman documentation.