Custom emoji and stickers
Community Settings → Custom Emoji and Custom Stickers. You need Manage Expressions.
- Emoji: JPEG, PNG, WebP, GIF, max 384 KB, compressed to 128×128. Name: 2+ characters, letters, numbers,
_. Default slots: 50 static + 50 animated. - Stickers: exactly 320×320, max 512 KB, name 2–30 characters, up to 10 tags. Default slots: 50.
- Inside that community everyone can use them. In DMs and other communities, other people’s sets need Plutonium (and Use External Emoji / Stickers).
- Expression packs: User Settings → Expression Packs. This is a Plutonium perk: up to 50 created and 50 installed packs of each type, 200 items per pack.
Webhooks
Community Settings → Webhooks or Channel Settings → Webhooks. You need Manage Webhooks.
A webhook is a URL. An external program POSTs to it and the message appears in the channel under the webhook’s name and avatar. Treat the URL like a password: anyone who has it can post. Delete the webhook if the link leaks.
Bots and OAuth apps: Applications, bots, and authorizations.