# CheckMeIn Developer

## CheckMeIn Developer

- [Introduction](https://api.checkmein.cloud/master.md): Welcome to the CheckMeIn Developer website. Here you can find API functions, examples and tutorials to enhance your CheckMeIn experience.
- [Getting Started](https://api.checkmein.cloud/getting-started.md): This guide will cover the basics of CheckMeIn's Plugin system.
- [API Functions](https://api.checkmein.cloud/api-functions.md): Listed here are all API functions, along with instructions on how to use them.
- [Roblox Premium Rooms](https://api.checkmein.cloud/tutorials/roblox-premium-rooms.md): Increase Premium playtime by offering them an exclusive room, using the API. You can download the final plugin files at the bottom of this page.
- [CooldownService](https://api.checkmein.cloud/tutorials/cooldownservice.md): CooldownService tracks how often players call important CheckMeIn events. It then limits the amount of calls players can make, according to your Timer setting.
- [Getting Started](https://api.checkmein.cloud/checkmein-4.0/getting-started.md)
- [API Functions](https://api.checkmein.cloud/checkmein-4.0/api-functions.md): Listed here are all API functions, along with instructions on how to use them.
- [Database](https://api.checkmein.cloud/checkmein-4.0/database.md): CheckMeIn 4.0 uses an internal database to keep track of all rooms. Explained on this page is how the database is structed, and what you can do with it.