# RealtimeErrorCode

# Type Alias: RealtimeErrorCode

```ts
type RealtimeErrorCode = 
  | "TOKEN_EXPIRED"
  | "CONNECTION_FAILED"
  | "PERMISSION_DENIED"
  | "PROVIDER_ERROR"
  | "UNKNOWN";
```

Defined in: [packages/typescript/ai/src/realtime/types.ts:280](https://github.com/TanStack/ai/blob/main/packages/typescript/ai/src/realtime/types.ts#L280)

Error codes for realtime errors