> ## 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.

# verify • AI Agent SDK

> verify: Verify ``device`` against an issued nonce; return its role, or ``None`` if rejected.

# verify

Method

> This is a method of the [**DeviceIdentityProtocol**](https://praison.ai/docs/sdk/reference/praisonaiagents/classes/DeviceIdentityProtocol.md) class in the [**protocols**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/protocols.md) module.

Verify `device` against an issued nonce; return its role, or `None` if rejected.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def verify(device: DeviceAuth) -> Optional[str]
```

## Parameters

**device** `DeviceAuth` *required*

No description available.

### Returns

**Returns** `Optional[str]`

The result of the operation.

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/gateway/protocols.py#L417)
>
> `praisonaiagents/gateway/protocols.py` at line 417


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