> ## 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.

# Get Default Middleware Registry • AI Agent SDK

> get_default_middleware_registry: Get the global default middleware registry.

# get\_default\_middleware\_registry

<div className="flex items-center gap-2">
  <Badge color="teal">Function</Badge>
</div>

> This function is defined in the [**middleware\_registry**](../modules/middleware_registry) module.

Get the global default middleware registry.

Implements thread-safe singleton pattern for the global registry.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def get_default_middleware_registry() -> MiddlewareRegistry
```

### Returns

<ResponseField name="Returns" type="MiddlewareRegistry">
  Global MiddlewareRegistry instance
</ResponseField>

## Uses

* `MiddlewareRegistry`

## Used By

* [`register_middleware`](../functions/register_middleware)
* [`get_middleware`](../functions/get_middleware)

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/runtime/middleware_registry.py#L128">
  `praisonaiagents/runtime/middleware_registry.py` at line 128
</Card>

***

## Related Documentation

<CardGroup cols={2}>
  <Card title="Middleware Feature" icon="layer-group" href="/docs/docs/features/middleware" />
</CardGroup>