> For the complete documentation index, see [llms.txt](https://docs.api.uwuapps.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.api.uwuapps.org/readme.md).

# Introduction

Welcome to the **UwU Apps API** documentation. This is a free, serverless REST API providing a wide range of utility services — from calculations and conversions to random content, Singapore-specific data, and more.

## What's available

| Category                            | Description                                                                |
| ----------------------------------- | -------------------------------------------------------------------------- |
| [Calc](/calc/age.md)                | Age, BMI, days between dates, interest, aspect ratio                       |
| [Convert](/convert/temperature.md)  | Temperature, weight, base numbers, morse code, currency, ciphers, encoding |
| [Check](/check/password.md)         | Password strength, color contrast (WCAG)                                   |
| [Generate](/generate/password.md)   | Passwords, QR codes, gradients                                             |
| [NRIC](/nric/validate.md)           | Validate, generate, and reconstruct Singapore NRICs                        |
| [UEN](/uen/validate.md)             | Validate and generate Singapore UENs                                       |
| [Car Plate](/car-plate/validate.md) | Validate and generate Singapore car plates                                 |
| [Predict](/predict/gender.md)       | Predict gender, age, and nationality from a name                           |
| [Random](/random/joke.md)           | Jokes, Pokémon, images, quotes, dice, coin flips, and more                 |
| [Search](/search/movie.md)          | Movies, recipes, cocktails, countries, words, images                       |
| [SG](/singapore/bus-arrivals.md)    | Singapore bus arrivals, bus stops, and air quality (PSI)                   |
| [Detect](/detect/browser.md)        | Browser and OS detection, reverse geocoding                                |
| [Scan](/scan/qr.md)                 | QR code scanning                                                           |
| [Translate](/translate/text.md)     | Text translation and language detection                                    |
| [Weather](/weather/current.md)      | Current weather, 7-day forecast, and precipitation nowcast                 |
| [Wordle](/wordle/word.md)           | Get and validate words for Wordle-style games                              |
| [CAPTCHA](/captcha.md)              | CAPTCHA generation and verification                                        |

## Quick start

All endpoints are HTTP `GET` requests (except QR scanning which is `POST`). Parameters are passed as query strings.

```
GET https://api.uwuapps.org/calc/age?date=2000-01-15
```

See [Getting Started](/getting-started.md) for full details on base URLs, response formats, and error handling.


---

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