# BlockRun Phone Fraud Lookup

> BlockRun Phone Fraud Lookup is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Checks a phone number for fraud risk signals, returning a fraud assessment for the given E.164-formatted phone number.

## Facts

- Endpoint: POST https://blockrun.ai/api/v1/phone/lookup/fraud
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockrun-phone-fraud-lookup-6cbfee70
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rhIoud6JQhvKP9SYXLG2Z

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 blockrun-phone-fraud-lookup-6cbfee70 -d '<json body>'
```

Example prompt: Can you check whether the phone number +14155552671 is associated with fraud or scam activity?

## When to prefer this

Use this endpoint when you need to assess fraud risk for a specific phone number during user onboarding, transaction verification, or suspicious activity review. Prefer this over generic phone validation services when fraud scoring with pay-per-call USDC settlement (no API key required) is acceptable, especially in agentic workflows on Base or Solana.

## Known failure modes

- Invalid phone number format (not E.164) — returns validation error
- Phone number not found in fraud database — may return no-data or low-confidence result
- Payment failure (insufficient USDC balance) — returns 402 Payment Required
- Rate limiting or quota exceeded — returns 429 Too Many Requests
- Upstream data provider unavailable — returns 503 or timeout

## How this service works

Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.

## Output

A fraud assessment for the provided phone number, likely including a risk score or flag, fraud indicators, and related signals about the number's legitimacy or association with fraudulent activity.

## Example request

```json
{
 "phoneNumber": "+14155552671"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "phoneNumber": {
   "type": "string",
   "description": "Phone number to look up in E.164 format."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockrun-phone-fraud-lookup-6cbfee70/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockrun.ai](https://www.zero.xyz/host/blockrun.ai/llms.txt)