# Roblox API Reference

> Unofficial Roblox Engine API reference. Search and browse every class, member, enum, and data type, and see what changed in each Roblox Studio build.

This build is generated from the API dump and the English API docs for Roblox Studio 0.744.0.7441077 (version-7aaa6838d36c4448) on the LIVE channel, which Roblox published on 2026-10-19. It lists 947 classes, 652 enums, and 78 data types.

Each class, enum, and data type page has a Markdown version. To get the Markdown version of a page, remove the trailing slash from the page URL and add `.md`. For example, the Markdown version of https://rapi.sleaze.dev/classes/Part/ is https://rapi.sleaze.dev/classes/Part.md.

## When to use this reference

Use this reference to:

- Look up the properties, methods, events, and callbacks of a Roblox class.
- Find the members that a class inherits from its superclasses.
- Check the Luau signature of a member, including parameter types, default values, and return types.
- Check the items and numeric values of a Roblox enum.
- Check the security level, thread safety, capabilities, and tags of a member, such as Deprecated or Yields.
- Find the class members that use a data type or an enum.
- Check what changed in the API from one Roblox Studio version to the next.

Do not use this reference for tutorials, guides, or the Luau language.

## URL patterns

- Class: https://rapi.sleaze.dev/classes/{ClassName}.md
- Enum: https://rapi.sleaze.dev/enums/{EnumName}.md
- Data type: https://rapi.sleaze.dev/index/types/{TypeName}.md
- Update: https://rapi.sleaze.dev/updates/{Version}.md

Replace the placeholder with the exact name, such as `Part`, `KeyCode`, or `CFrame`, or with a version, such as `0.744.0.7441077`. Names are case-sensitive. Enum URLs do not include the `Enum.` prefix.

## Indexes

- [Classes](https://rapi.sleaze.dev/classes.md): Every class, with its superclass and tags, such as Service and Deprecated
- [Enums](https://rapi.sleaze.dev/enums.md): Every enum, with its tags
- [Data types](https://rapi.sleaze.dev/index/types.md): Every data type, with its category
- [Updates](https://rapi.sleaze.dev/updates.md): Every update, with the number of added, removed, and changed API items

## Optional

- [About](https://rapi.sleaze.dev/about.md): What this site is, where its data comes from, and how it is updated
- [Contact](https://rapi.sleaze.dev/contact.md): How to report a problem or suggest a feature
- [Privacy policy](https://rapi.sleaze.dev/privacy.md): What the site collects
- [Sitemap](https://rapi.sleaze.dev/sitemap.xml): Every HTML page