Custom slime
A user-created slime species defined by a color palette, created via the Custom Slime API. Custom slimes are palette-only — no custom sprite art.
Custom slimes let developers skin their own slime. Each one is defined by an indexed color palette — 5 required colors (keys "1"–"5", hex values) plus 3 optional accent colors (keys "6"–"8") — applied to VibeMon's shared slime rig, not a hand-drawn sprite. The API still accepts an optional sprites field for compatibility with older clients, but the server validates and discards it; nothing you upload there is stored or rendered.
Plan limits, the public gallery and the full field reference are on the Custom Slime API page. Inside the garden, looks are part of making it yours: ten slime colors, hats, outfits, weapons, eye styles and decor.
Related terms
- Garden energy — What the VibeMon garden runs on: activity from your AI coding agents — edits, commits and passing tests — turned into energy that the slime gardeners spend.