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

# Compliance Screener

> Screen blockchain addresses against sanctions, fraud, and risk databases before transacting

The Compliance Screener checks blockchain addresses against sanctions lists, known fraud databases, and risk scoring services. Use it before processing transactions to flag high-risk addresses and maintain regulatory compliance.

The screener is available as a **public API** — no authentication required.

***

## Check an Address

```bash theme={null}
curl -X POST 'https://crypto-api.yativo.com/api/v1/screener/check' \
  -H 'Content-Type: application/json' \
  -d '{
    "address": "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4"
  }'
```

```json Response theme={null}
{
  "success": true,
  "data": {
    "address": "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4",
    "risk_level": "low",
    "flagged": false,
    "checks": {
      "sanctions": false,
      "fraud": false,
      "darknet": false,
      "mixer": false
    },
    "checked_at": "2026-04-01T12:00:00Z"
  }
}
```

***

## Risk Levels

| Level      | Description                                                           |
| ---------- | --------------------------------------------------------------------- |
| `low`      | Address has no known risk indicators                                  |
| `medium`   | Address has some indirect exposure to flagged entities                |
| `high`     | Address is directly associated with sanctioned or fraudulent activity |
| `critical` | Address is on an active sanctions list — **do not transact**          |

***

## Batch Check

Screen multiple addresses in a single request:

```bash theme={null}
curl -X POST 'https://crypto-api.yativo.com/api/v1/screener/batch-check' \
  -H 'Content-Type: application/json' \
  -d '{
    "addresses": [
      "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4",
      "0x742d35Cc6634C0532925a3b8D4C9C2A5Ef8C2B1",
      "7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU"
    ]
  }'
```

```json Response theme={null}
{
  "success": true,
  "data": {
    "results": [
      { "address": "0x9F8b...", "risk_level": "low", "flagged": false },
      { "address": "0x742d...", "risk_level": "low", "flagged": false },
      { "address": "7xKXt...", "risk_level": "low", "flagged": false }
    ],
    "checked_at": "2026-04-01T12:00:00Z"
  }
}
```

***

## Service Info

Get the screener's current capabilities and usage information:

```bash theme={null}
curl -X GET 'https://crypto-api.yativo.com/api/v1/screener/info'
```

***

## Health Check

```bash theme={null}
curl -X GET 'https://crypto-api.yativo.com/api/v1/screener/health'
```

***

## Integration Pattern

Screen addresses before sending funds or accepting deposits:

```typescript theme={null}
// Before sending funds
const screen = await fetch('https://crypto-api.yativo.com/api/v1/screener/check', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ address: recipientAddress }),
});
const { data } = await screen.json();

if (data.risk_level === 'critical' || data.risk_level === 'high') {
  throw new Error(`Address ${recipientAddress} is flagged: ${data.risk_level}`);
}

// Safe to proceed with the transaction
```

***

## Next Steps

<CardGroup cols={2}>
  <Card title="API Reference" icon="code" href="/api-reference/screener/check">
    Full endpoint reference for the screener.
  </Card>

  <Card title="Transactions" icon="arrow-right-arrow-left" href="/yativo-crypto/transactions">
    Send funds after screening the recipient.
  </Card>
</CardGroup>