Identify every visitor and device — even the anonymous ones
Guarda merges device fingerprinting with IP intelligence so you can recognize returning visitors, catch bots, VPNs, proxies and private windows, and block fake signups, bonus abuse and payment fraud before it happens.
- No card required
- REST + JSON
- Batch ready
Live fraud risk check
Check any public IPv4 or IPv6 address right now — no account needed.
An IP intelligence layer built for B2B teams
Guarda is a business-to-business product. Fraud, risk, payments and platform teams plug it into signup flows, checkout, login and content delivery — with invoices, VAT handling and API keys made for company use, not consumer apps.
For risk and engineering teams
Server-side REST API, batch screening and API keys per environment so your platform, not your end users, does the checking.
SaaS, marketplaces and fintech
Block fake signups, bonus abuse and payment fraud, and keep geo-licensing and compliance rules enforceable at scale.
Business-friendly commercials
One-time plans for a fixed access period, company invoices with VAT details, and no per-seat pricing or recurring charges.
Everything you need to score devices and traffic
A single endpoint returns the signals fraud, abuse and compliance teams actually use.
Device fingerprinting
A stable visitor ID built from 25+ hardware and browser signals — consistent across normal and private windows, resilient to browser updates.
Bot & automation detection
Our Lies Engine catches headless browsers, webdriver flags, patched APIs and spoofed fingerprints that genuine visitors never produce.
Unified fraud score
Network reputation and device integrity fuse into one 0–100 suspect score with clear, human-readable reasons behind every verdict.
Proxy & VPN detection
Identify commercial VPNs, open proxies, residential relays and anonymising networks before they touch your product.
TOR exit awareness
Live TOR exit-node intelligence so anonymised traffic is flagged the moment it appears.
Risk scoring
Every address returns a 0–100 risk score so you can block, challenge or allow with a single threshold.
Geolocation
Country, region, city, timezone and currency for localisation, compliance and fraud rules.
ASN & provider
Autonomous system number, hosting provider and ISP so you can spot datacenter ranges instantly.
Batch processing
Screen whole address lists in one request and export the results straight to CSV.
Disposable email detection
Flag throwaway and temporary inboxes at signup with a disposable-domain database synced daily from trusted open-source feeds.
Signup protection
Registrations from VPNs, proxies and disposable emails are screened automatically, so fake accounts never reach your database.
Free security tools
What-is-my-IP, CIDR calculator, WHOIS, bulk lookup and a disposable-email checker — free, no account needed.
One fraud score, two detection engines
Guarda fuses what the network says about a connection with what the browser reveals about the device. You get a single suspect score your rules can act on — no signal stitching on your side.
Network engine
Proxy, VPN and TOR detection, ASN and hosting classification, and live IP reputation scoring.
Device engine
Hardware-stable visitor IDs, automation artifacts, headless environments and fingerprint tampering.
Fused verdict
A 0–100 fraud score with level and reasons, cross-checked for timezone and geo mismatches.
{
"visitorId": "9f3ac1d8e2b47f06",
"fraudScore": 87,
"fraudLevel": "critical",
"fraudReasons": [
"Automated browser (webdriver flag set)",
"Datacenter / hosting network",
"Browser timezone does not match IP geolocation"
]
}Live in three steps
Create a free account
Sign up in seconds and get 500 free daily queries.
Generate an API key
Issue and revoke keys per environment from the dashboard.
Query and act
Call the API, read the risk score, and block what matters.
Frequently asked questions
Still unsure? Talk to us.
Start screening traffic in minutes
Free forever for 500 daily queries. Upgrade only when your volume grows.