> ## 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.

# nack • AI Agent SDK

> nack: Negative acknowledge - request redelivery.

# nack

<div className="flex items-center gap-2">
  <Badge color="blue">Async</Badge>
  <Badge color="purple">Method</Badge>
</div>

> This is a method of the [**DeliveryGuaranteeProtocol**](../classes/DeliveryGuaranteeProtocol) class in the [**protocols**](../modules/protocols) module.

Negative acknowledge - request redelivery.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
async def nack(client_id: str, event_id: str) -> None
```

## Parameters

<ParamField query="client_id" type="str" required={true}>
  No description available.
</ParamField>

<ParamField query="event_id" type="str" required={true}>
  No description available.
</ParamField>

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/gateway/protocols.py#L1421">
  `praisonaiagents/gateway/protocols.py` at line 1421
</Card>