Make sure you have the Manage Server permission in the server you want to invite Fire to.
Head to inv.wtf/fire in your browser. If you aren't signed into Discord on the web, you will be asked to do so. Once signed in, you will be greeted with the page below. Select a server, click Authorize and complete the Captcha. Voila! Fire is now in your server, ready to rock and roll.
{% hint style="info" %} By default, Fire requests Administrator permissions. This is to ensure no commands break due to a lack of permissions. Don't want to give it all the power? That's fine. You can head to Server Settings > Roles and edit the permissions for the auto-generated "Fire" role. {% endhint %}