> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Message Undelivered Input • AI Agent SDK

> MessageUndeliveredInput: Input for MESSAGE_UNDELIVERED hooks (a reply could not be delivered).

# MessageUndeliveredInput

> Defined in the [**events**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/events.md) module.

AI Agent

Input for MESSAGE\_UNDELIVERED hooks (a reply could not be delivered).

Fired by the gateway when an outbound reply fails *permanently* (the target
was confirmed dead, or delivery exhausted its retries) so operators can
route the failure — mirror it to a home channel, alert, or re-queue —
without patching adapters. It is a notification only: the reply has already
been parked in the DLQ (when configured) and, best-effort, a short plain-text
notice may have been attempted on the same channel.

## Properties

**platform** `str`

No description available.

**content** `str`

No description available.

**channel\_id** `str`

No description available.

**error** `str`

No description available.

**notice\_delivered** `bool`

No description available.

> [accordion] Internal & Generic Methods
>
> * **to\_dict**: Generic utility method.

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/hooks/events.py#L363)
>
> `praisonaiagents/hooks/events.py` at line 363


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.