# BlockInt Address Fraud Screener

> BlockInt Address Fraud Screener is a paid API for AI agents from blockint.ai, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Screens an EVM blockchain address against the C3 community fraud database and OFAC sanctions list, returning 'caution' or 'clean'.

## Facts

- Endpoint: GET https://blockint.ai/api/v1/screen/:address
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockint-ai-ce25632f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ujaXkCGP9yNmSl09COjwO

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-ce25632f
```

Example prompt: Can you check if the wallet address 0x4e9ce36e442e55ecd9025b9a6e0d88485d628a67 is flagged for fraud or OFAC sanctions before I send any funds to it?

## When to prefer this

Use this endpoint when you need a fast, low-cost binary risk check on a single EVM wallet address before initiating a transaction, and want coverage from both community-sourced C3 fraud reports and official OFAC sanctions in one call.

## Known failure modes

- Invalid address format (non-0x-prefixed or wrong length) returns an error
- Network timeout or service unavailability returns a 5xx error
- Payment failure ($0.01 USDC) blocks the request with a 402 response
- Unknown or unindexed address returns 'clean' even if fraudulent but unreported

## How this service works

Screens an address for risk signals and wallet exposure.

## Output

Returns a simple risk verdict: 'caution' if the address appears in the C3 community fraud reports or is on the OFAC sanctions list, or 'clean' if no issues are found.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "pathParams": {
   "address": "0x1234567890123456789012345678901234567890"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM wallet address (0x-prefixed, 42 chars) to screen for fraud reports"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockint-ai-ce25632f/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)