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BlockRun Phone Fraud Lookup
x402
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.
Price / call$0.05
Success—
StatusUnknown
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 use cases
Verify user phone before account creation
“A new user just signed up with the phone number +12125551234. Can you quickly check if that number has any fraud red flags before we let them create an account?”
Flag suspicious activity during payment
“Someone's trying to make a large transaction from this account using the phone number +33612345678. Can you assess whether that phone number looks fraudulent or risky?”
Screen customer contacts for security
“We've got a batch of customer phone numbers from recent support tickets. Can you scan through them and let me know which ones have high fraud risk signals so we can investigate further?”
Technical details
Endpoint
POSThttps://blockrun.ai/api/v1/phone/lookup/fraudWhen to prefer
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.
Side effects
- 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
Input
{
"phoneNumber": "+14155552671"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| phoneNumber | string | Phone number to look up in E.164 format. |
Output
{
"url": "https://lookups.twilio.com/v2/PhoneNumbers/+14155552671",
"valid": true,
"pre_fill": null,
"sim_swap": {
"error_code": 60606,
"carrier_name": null,
"last_sim_swap": null,
"mobile_country_code": null,
"mobile_network_code": null
},
"caller_name": null,
"line_status": null,
"country_code": "US",
"phone_number": "+14155552671",
"identity_match": null,
"call_forwarding": {
"error_code": 60607,
"call_forwarding_enabled": null
},
"national_format": "(415) 555-2671",
"sms_pumping_risk": null,
"reassigned_number": null,
"validation_errors": [],
"calling_country_code": "1",
"line_type_intelligence": {
"type": null,
"error_code": 60600,
"carrier_name": null,
"mobile_country_code": null,
"mobile_network_code": null
},
"phone_number_quality_score": null
}Tags
x402
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