> ## 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.

# open • AI Agent SDK

> open: Open the stored attachment for reading (outbound download).

# open

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

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

Open the stored attachment for reading (outbound download).

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def open(ref_id: str) -> 'BinaryIO'
```

## Parameters

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

### Returns

<ResponseField name="Returns" type="'BinaryIO'">
  The result of the operation.
</ResponseField>

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/gateway/protocols.py#L689">
  `praisonaiagents/gateway/protocols.py` at line 689
</Card>