> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gu1.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Transaction risk score

> Screen an Ethereum transaction hash for AML risk via Gu1 AML Crypto.

## Endpoint

```
GET https://api.gu1.ai/api/aml-crypto/transaction-risk-score?protocol=eth&hash=0x...
```

## Query parameters

| Param      | Required | Description      |
| ---------- | -------- | ---------------- |
| `protocol` | Yes      | Only `eth`       |
| `hash`     | Yes      | Transaction hash |

Persists a history snapshot when useful data is returned (`checkId` optional).