FastKYC
Identity APIs

IP Quality Check API

Assess an IP address for risk, returning ASN, ISP, geographic location and indicators of malicious activity such as proxies, VPNs and abuse.

Illustration of a verified identity document representing the IP Quality Check API

What the IP Quality Check API does

IP Quality Check evaluates an IP address and returns its Autonomous System Number, ISP, geographic location and any indicators of malicious activity associated with it.

The risk indicators are the operative output. An address associated with a VPN, proxy, hosting provider or known abuse is a meaningful signal, particularly when a customer's stated location contradicts where the connection appears to originate.

Where teams use the IP Quality Check API

  1. Fraud screening at login and sign-up

  2. Detecting VPN and proxy usage in onboarding

  3. Flagging connections from hosting infrastructure

  4. Adding network risk to a decision engine

Frequently Asked Questions (FAQs)

Why does hosting infrastructure matter?

Genuine consumers connect from residential or mobile networks. A connection from a data centre usually means automation or an anonymising service.

Should VPN use block a customer?

Not on its own; plenty of people use VPNs legitimately. Weigh it with other signals rather than treating it as decisive.

How accurate is the location?

Good at country level, approximate below that. Treat it as a signal, not proof.

Start verifying with the IP Quality Check API

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  • Built for onboarding at scale
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