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

# VastAI.defrag_machines

Defragment machines.

<Note>This is a **host** method, used for managing machines you are renting out on Vast.ai.</Note>

## Signature

```python theme={null}
VastAI.defrag_machines(IDs: List[int]) -> str
```

## Parameters

<ParamField path="IDs" type="List[int]" required>
  IDs
</ParamField>

## Returns

`str`, Result from the API call.

## Example

```python theme={null}
from vastai import VastAI

client = VastAI(api_key="YOUR_API_KEY")
result = client.defrag_machines(IDs=[12345])
print(result)
```