Call via POST http://127.0.0.1:3000/modify_custom_face (JSON params as the body) or WebSocket.
| Param | Type | Required | Default | Description |
|---|---|---|---|---|
emoji_id |
string | ✓ | ||
desc |
string | – | "" |
Returns the standard OneBot envelope; the data shape is not yet documented.
MCP-capable clients can discover and call this action directly — no hand-written HTTP. See MCP.