> ## Documentation Index
> Fetch the complete documentation index at: https://cognitio-agent.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# EventSessionError

> Exact type definition referenced by the public SDK.

This definition is generated from the same source as the SDK. Protocol types describe the runtime HTTP API; prefer the high-level SDK for session ownership and callbacks.

```ts theme={null}
export type EventSessionError = {
  type: "session.error"
  properties: {
    sessionID?: string
    error?:
      | ProviderAuthError
      | UnknownError
      | MessageOutputLengthError
      | MessageAbortedError
      | StructuredOutputError
      | ContextOverflowError
      | ApiError
  }
}
```

Related types: [ApiError](https://cognitio-agent.mintlify.site/api-reference/protocol/ApiError.md), [ContextOverflowError](https://cognitio-agent.mintlify.site/api-reference/protocol/ContextOverflowError.md), [MessageAbortedError](https://cognitio-agent.mintlify.site/api-reference/protocol/MessageAbortedError.md), [MessageOutputLengthError](https://cognitio-agent.mintlify.site/api-reference/protocol/MessageOutputLengthError.md), [ProviderAuthError](https://cognitio-agent.mintlify.site/api-reference/protocol/ProviderAuthError.md), [StructuredOutputError](https://cognitio-agent.mintlify.site/api-reference/protocol/StructuredOutputError.md), [UnknownError](https://cognitio-agent.mintlify.site/api-reference/protocol/UnknownError.md).


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