Call via POST http://127.0.0.1:3000/set_group_reaction (JSON params as the body) or WebSocket.
| Param | Type | Required | Default | Description |
|---|---|---|---|---|
group_id |
uint | – | ||
message_id |
messageId | ✓ | ||
code |
string | ✓ | ||
is_set |
bool | – | true |
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.