# SignalR
LLMS index: [llms.txt](/llms.txt)
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## SignalR Attributes
SignalR attributes
**Attributes:**
| Key | Stability | Value Type | Description | Example Values |
| --- | --- | --- | --- | --- |
| `signalr.connection.status` |  | string | SignalR HTTP connection closure status. | `app_shutdown`; `timeout` |
| `signalr.transport` |  | string | [SignalR transport type](https://github.com/dotnet/aspnetcore/blob/main/src/SignalR/docs/specs/TransportProtocols.md) | `web_sockets`; `long_polling` |
---
`signalr.connection.status` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
| --- | --- | --- |
| `app_shutdown` | The connection was closed because the app is shutting down. |  |
| `normal_closure` | The connection was closed normally. |  |
| `timeout` | The connection was closed due to a timeout. |  |
---
`signalr.transport` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
| --- | --- | --- |
| `long_polling` | LongPolling protocol |  |
| `server_sent_events` | ServerSentEvents protocol |  |
| `web_sockets` | WebSockets protocol |  |