Advanced FraudDetection API
Fraud scores and risk signals on every phone, email and IP check. Protect your business from sophisticated fraud attacks with multi-vector analysis in one API.
0-100
Fraud Score
1 credit
Per Check
200 per 10 s
Per API key, 1,000 a minute per account

Advanced Fraud Detection Capabilities
AI-powered multi-vector analysis for fraud prevention
Advanced AI Fraud Detection
Every email and IP check returns a 0-100 fraud score and every phone check a low, medium or high risk level, so a signup or order can be scored while it happens.
Multi-Vector Risk Analysis
Risk assessment across phone, email, IP, and identity vectors. Cross-reference data points to build complete fraud profiles and identify coordinated attack campaigns.
Real-Time Threat Intelligence
IP checks flag VPNs, proxies, datacenter addresses and Tor exit nodes, and email checks flag disposable and role addresses, so known-bad infrastructure is caught at the door.
Device & Network Fingerprinting
Advanced device fingerprinting and network analysis to identify fraudsters across devices and sessions. Detect device spoofing, emulators, and suspicious network patterns.
Reputation data comes back with every check
Phone spam check adds a 0-100 spam score and robocall reputation for any number, alongside the fraud score on every email and IP check.
One request scores a signup or order
Send the phone, email and IP checks in parallel and decide in the same request cycle, with 200 requests per 10 seconds allowed for each API key, and each account can make up to 1,000 requests a minute in total across all its keys.
Fraud Detection Use Cases & Results
Proven fraud prevention across industries with measurable impact on security and revenue
Payment & Transaction Fraud
Prevent credit card fraud, account takeover, and suspicious transactions. Analyze payment patterns, device fingerprints, and user behavior to block fraudulent purchases.
- Credit card protection
- Account takeover prevention
- Transaction monitoring
- Chargeback reduction
Account Registration & Identity Fraud
Detect fake account creation, synthetic identities, and identity theft during registration. Verify user identities and prevent fraudulent account creation.
- Fake account blocking
- Identity verification
- Synthetic ID detection
- Registration protection
Communications & SMS Fraud
Identify fraudulent phone numbers, SIM swap attacks, and suspicious communication patterns. Protect SMS verification and phone-based authentication systems.
- SIM swap detection
- SMS fraud prevention
- Phone verification
- Communication security
Digital Marketing & Ad Fraud
Protect advertising spend from click fraud, bot traffic, and invalid engagement. Ensure marketing budgets reach real users and improve campaign ROI.
- Click fraud prevention
- Bot traffic filtering
- Ad spend protection
- Campaign optimization
Business & B2B Fraud
Verify business identities, detect fraudulent companies, and prevent B2B fraud. Analyze business registration data, financial records, and corporate networks.
- Business verification
- Corporate fraud detection
- Vendor screening
- Partnership validation
E-commerce & Retail Fraud
E-commerce fraud protection including shipping fraud, return abuse, and promotional fraud. Protect revenue while maintaining customer experience.
- Shipping fraud prevention
- Return abuse detection
- Promotional fraud blocking
- Revenue protection
Fraud Detection Market Insights
Industry research and statistics highlighting the critical need for fraud prevention
Global Fraud Impact
KeepNet Labs research shows smishing accounts for 39% of mobile threats in 2024, with successful attacks costing organizations over $9.5M on average.
Identity & Digital Security
Industry research indicates 3+ billion people use mobile phones as their primary digital identity, while nearly 50% of fraud reported to the FTC originates from phone/SMS channels.
Fraud Prevention Industry Impact
33%
Finance Sector Targeting
27%
Healthcare Attacks
23%
Government Targeting
$3.13
Cost per $1 Fraud Loss
Security research shows finance (33%), healthcare (27%), and government (23%) are primary targets for fraud attacks. For every dollar lost to fraud, businesses incur $3.13 in related costs.
Industries Using Fraud Detection
Trusted across sectors for fraud prevention and security
Why Choose 1Lookup Fraud Detection?
Fraud signals on the same API and credits you already use
Every signal is shown next to the score
VPN, proxy, Tor, disposable and VoIP flags come back with the score, so you can see why a contact was flagged
200 requests per 10 seconds are allowed for each API key
Enough headroom to score every signup and checkout as it happens, and each account can make up to 1,000 requests a minute in total across all its keys
Fraud signals cost the same credits as validation
One credit per phone, email or IP check, with no separate fraud contract
Phone, email and IP share one API
Check all three with the same API key and the same credit balance
Simple Fraud Detection Integration
Multi-vector fraud analysis with a single API call
// Fraud signals: check the phone, email and IP together
const lookup = (route, body) =>
fetch('https://app.1lookup.io/api/v1/' + route, {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify(body)
}).then((res) => res.json())
const [phone, email, ip] = await Promise.all([
lookup('phone', { phone_number: '+14155552671' }),
lookup('email', { email: 'jane.doe@acme.com' }),
lookup('ip', { ip: '104.227.91.244' })
])
// ip response
{
"success": true,
"data": {
"risk_assessment": {
"risk_level": "MEDIUM",
"fraud_score": 40
},
"classification": {
"connection_type": "DATACENTER"
},
"insights": {
"location": {
"city": "Miami",
"country": "United States"
}
}
}
}
// email response
{
"success": true,
"data": {
"classification": {
"email_type": "BUSINESS",
"deliverability_status": "DELIVERABLE"
},
"insights": {
"quality": { "score": 85 },
"deliverability": { "score": 70 }
},
"risk_assessment": {
"risk_level": "LOW",
"fraud_score": 5
}
}
}Fraud Detection API FAQ
Common questions about our fraud prevention service
Technical Specifications
Fraud Score
0-100
Rate Limit
200 per 10 s per key
Plus 1,000 a minute for each account
IP Flags
VPN, proxy, Tor
Email Flags
Disposable, role
Cost
1 credit per check
Result Caching
7 days
Start Preventing Fraud Today
Protect your business with fraud signals on every phone, email and IP check. Stop sophisticated attacks before they impact your revenue and reputation.
7-day free trial • Setup in 5 minutes • Premium support