---
title: "@mswjs/data"
description: "Tools for modeling and querying data in tests."
pagination: false
---

{/* Generated from content/. Edit the catalog, not this page. */}

<PurposeNote title="Good for">Building a stateful mocked backend for application test scenarios.</PurposeNote>

## What it does

Tools for modeling and querying data in tests.

## When it fits

Building a stateful mocked backend for application test scenarios.

## Other options in this category

<div data-pagefind-ignore>

- [@msw/playwright](/testing/msw-playwright) — Controlling network responses during browser-level application tests.
- [Argos](/testing/argos) — Detecting interface changes by comparing screenshots in development workflows.
- [enforce-unique](/testing/enforce-unique) — Avoiding duplicate fixture values while creating test data.
- [Faker](/testing/faker) — Creating sample users, records, and large development datasets.
- [Falso](/testing/falso) — Creating typed fixtures such as names, addresses, and product details.

</div>

## Source

[Project source for @mswjs/data ↗](https://www.npmjs.com/package/@mswjs/data)

Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.

[Test a user workflow →](/tasks/test-a-user-workflow)

[All testing &amp; mock data options →](/testing)