> ## 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

Function

> This function is defined in the [**middleware\_registry**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/middleware_registry.md) 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

**Returns** `MiddlewareRegistry`

Global MiddlewareRegistry instance

## Uses

* `MiddlewareRegistry`

## Used By

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

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/runtime/middleware_registry.py#L128)
>
> `praisonaiagents/runtime/middleware_registry.py` at line 128

***

## Related Documentation

> [card] [Middleware Feature](https://praison.ai/docs/docs/features/middleware)


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