# blockint.ai C3 Fraud Report Screen (Legacy Alias)

> blockint.ai C3 Fraud Report Screen (Legacy Alias) is a paid API for AI agents from blockint.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Screens a blockchain address for fraud reports and risk score using the C3 community database, returning a caution or clean verdict; legacy alias for /api/v1/screen/:address.

## Facts

- Endpoint: GET https://blockint.ai/api/v1/c3-reports/check/:address
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockint-ai-765c641e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B7-4pJLdtuJ2KDLdRoe_K

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability blockint-ai-765c641e
```

Example prompt: Can you screen the blockchain address 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE against the C3 community fraud database and tell me if it's flagged as caution or clean?

## When to prefer this

Use this endpoint when you need a quick fraud and sanctions check on a specific blockchain address and are working with existing integrations that reference the legacy c3-reports path. For new integrations, prefer GET /api/v1/screen/:address. Best suited for pre-transaction due diligence, compliance workflows, or scam detection pipelines.

## Known failure modes

- Invalid or malformed blockchain address returns an error
- Address not found in database still returns a clean verdict (not an error)
- Rate limiting or payment failure returns 402 or 429
- Network timeout on slow blockchain lookups
- Legacy endpoint may be deprecated in future — prefer /api/v1/screen/:address

## How this service works

Screen a blockchain address for fraud reports and risk score. Legacy alias — prefer GET /api/v1/screen/:address for new integrations.

## Output

Returns a verdict of 'caution' if the address has community fraud reports or is OFAC-sanctioned, or 'clean' if no issues are found, along with a risk score and any associated fraud report metadata from the C3 database.

## Example request

```json
{
 "address": "0x1234567890123456789012345678901234567890"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockint-ai-765c641e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockint.ai](https://www.zero.xyz/host/blockint.ai/llms.txt)