Free fraud detection tools
The same signals our API returns, as tools you can use right now. No signup, no card. Each one shows the equivalent API call underneath, so you can move from checking one value by hand to checking every signup automatically.
Fraud check playground
Paste an IP, email, phone number or domain and get the risk score with a plain-English explanation of every signal behind it.
Bulk list checker
Paste a list or upload a CSV and score every row at once — emails, phone numbers, IPs and domains mixed together. Duplicates removed, results downloadable.
IP lookup
Check any IP for VPN, proxy, Tor and datacenter use, with country, city and network operator. Loads your own address to start.
Disposable email checker
Find out whether an address is throwaway, role-based or from a free provider — and whether the domain can receive mail at all.
Domain age & risk checker
Registration date, registrar and mail configuration, with disposable and risky-TLD detection. Paste a domain or a full URL.
Phone number validator
Validate any number worldwide against its national numbering plan. Returns country, line type and E.164 format.
DMARC checker
Look up a domain's DMARC record and read it in plain English: none, quarantine or reject, who gets the reports, and what is worth fixing.
SPF record checker
Every mechanism in a domain's SPF record explained, the all qualifier judged, and the ten-DNS-lookup limit counted.
MX lookup
A domain's mail servers in the order they are tried, with the email provider behind them identified. Paste a domain or an address.
Public Trust Index
Disposable-email domains by TLD, published VPN exit-node counts, live Tor exits and verified datacenter ASNs. Updated weekly.
IBAN validator
Check an international bank account number's checksum, length and country, and whether it is inside SEPA. Computed offline — no bank is contacted.
Card number validator
Check a card number's Luhn checksum, length and brand, and spot published test numbers. No BIN database, nothing stored, nothing logged.
EU VAT validator
Validate an EU VAT number's format and check it against the Commission's VIES registry, with the trading name where the member state discloses one.
Need this in your code?
Every tool here is a thin layer over the LayerCall API, which also returns the reputation signals the free tools hold back — whether a value has been reported for abuse, when it was first seen across the network, and how many customers have flagged it. One call scores a whole signup: IP, email, phone and domain together.
1,000 lookups a month free. No card required.