FraudCheck API
Fraud checks in one API call. Screen the IP, email, phone, and shipping country at checkout or signup and get structured checks, an advisory 0–100 score, and reason codes back in single-digit milliseconds.
- For
- Developers and companies screening checkouts, signups, and onboarding
- Interface
- REST API — one call to /v1/screen or five à-la-carte endpoints; .NET SDK on NuGet
- Checks
- IP, email, phone, and country signals from 12+ datasets
- Speed
- Sub-10 ms typical processing
- Privacy
- Screening inputs are never stored
- Pricing
- Free tier to start; full feature set on every plan
About FraudCheck API
FraudCheck API is a screening service for developers: send the IP, email, phone, and shipping country from a checkout or signup, and one HTTPS call returns structured checks, an advisory 0–100 score, and reason codes — typically in single-digit milliseconds. It tells you what looks risky and why; your own rules decide what to do about it.
Signals come from 12+ continuously refreshed datasets: IP country, ASN, and network classification (datacenter, hosting, Tor); email disposability, MX validity, role accounts, and TLD risk; phone validity, region, and line type; and sanctions and country-risk data. Screening inputs are never stored — they're discarded the moment the response is sent. There's a free tier to start, a .NET SDK on NuGet, examples for cURL, Python, Node, and PHP, and free live lookup tools that need no API key.
Key capabilities
One call, four signals
POST once to /v1/screen and get IP, email, phone, and country checks back together — or call the à-la-carte endpoints for just the signal you need.
IP intelligence
Country, ASN, and network classification — datacenter, hosting, and Tor detection — from 12+ continuously refreshed datasets.
Email and phone checks
Disposable-domain and MX validation, role accounts, and TLD risk; phone validity, region, line type, and E.164 normalization.
Advisory score and reason codes
A stable 0–100 score with explicit reason codes, so your own rules make the call — no black-box verdicts. JSON, XML, or CSV.
Never stored
Screening inputs are discarded the moment the response is sent — nothing is written to a database, file, or backup.
SDKs, docs, and free tools
A .NET SDK on NuGet, cURL / Python / Node / PHP examples, full documentation, and live lookup tools you can try without an API key.
How it fits your operation
FraudCheck API is a cloud service: one HTTPS request from your checkout, signup, or onboarding flow, with sub-10 ms typical processing. Start on the free tier — every plan gets the full feature set, all 12+ datasets, and all five endpoints — and pay only as volume grows.
Questions about FraudCheck API
See FraudCheck API in action
Schedule a walkthrough with our team.