# Ntropi

> Ntropi is a free developer tool that empowers frontend engineers to simulate real-world errors, mock API responses, and network latency — instantly, without any backend.

Ntropi is a live mock API generator and frontend testing framework designed for developers. It lets you simulate HTTP errors (4xx, 5xx), add artificial network delays, and create mock API endpoints entirely in the browser — no server required. Perfect for testing error states, loading skeletons, and resilience of frontend applications.

## Product

- [Home](https://ntropi.tech/): Overview of Ntropi, the free frontend testing and mock API tool for developers.
- [Docs](https://ntropi.tech/docs): Full documentation on how to use Ntropi to simulate errors, mock APIs, and control network latency.

## Key Features

- [Mock API Generator](https://ntropi.tech/): Create live mock API endpoints with custom responses, status codes, and headers — no backend needed.
- [Error Simulation](https://ntropi.tech/): Simulate real-world HTTP errors (404, 500, 503, etc.) to test your app's error handling.
- [Network Latency Control](https://ntropi.tech/): Add configurable delays to API responses to test loading states and skeleton screens.

## About

- Ntropi is built for frontend engineers who need to rapidly test UI edge cases without spinning up a backend server.
- It is free to use and runs entirely in the browser.
- Ideal for testing error boundaries, retry logic, loading states, and fallback UIs.

## Optional

- llms-full.txt: https://ntropi.tech/llms-full.txt