MaxMind minFraud

Score a transaction for fraud risk before you capture the payment.

What it does

MaxMind's minFraud Score takes what you know about an order — the IP, the email, the billing address, the payment method — and returns a risk score from 0 to 100, informed by what it has seen across everyone else using it.

This calls the Score endpoint, hands back a response object, and turns a failure into a WP_Error rather than an exception, so a checkout can decide what to do about it rather than dying.

Features

• Get a risk score from 0 to 100 for an order
• Send as much or as little as you have — an IP alone works, more is better
• Read MaxMind's warnings about fields it could not use
• Keep an eye on the credits and funds left on the account
• Get the query id back, for looking a decision up later or disputing it
• Cache answers, and cache failures briefly so an outage is not amplified

Installation

composer require arraypress/wp-maxmind-minfraud

Quick start

Score an order and hold the risky ones for review:

use ArrayPress\MaxMind\MinFraud\Client;

$client = new Client( $account_id, $license_key );

$score = $client->check_score( [
	'device' => [ 'ip_address' => $order->ip ],
	'email'  => [ 'address' => $order->email ],
	'billing' => [
		'country'  => $order->billing_country,
		'postal'   => $order->billing_postcode,
	],
] );

if ( is_wp_error( $score ) ) {
	return; // Capture anyway; do not lose the sale to an API outage.
}

if ( $score->get_risk_score() >= 50 ) {
	$order->flag_for_review( $score->get_query_id() );
}

The more of the payload you fill in, the better the score. An IP on its own is a weak signal.

What it does not do

It scores, it does not decide. Where the threshold sits is a business question — too low and you turn away real customers, too high and it earns nothing — and it is worth reviewing against your own chargebacks rather than taking a number from a blog post.

Requirements

• PHP 8.3 or later
• WordPress 7.1 or later
• A MaxMind account id and licence key

License

GPL-2.0-or-later