Greip consultants

Q: Can Greip detect users hiding behind VPNs or proxies?

Yes. Greip maintains databases of known VPN providers, public proxies, Tor exit nodes, and data centre IP ranges. When you query an IP address, the API returns whether it belongs to any of these categories. This is useful for businesses that need to enforce geographic restrictions or flag users who are masking their real location during transactions.

We can help you automate your business with Greip and hundreds of other systems to improve efficiency and productivity. Get in touch if you’d like to discuss implementing Greip.

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About Greip

Greip is a fraud prevention and IP intelligence API that helps businesses detect fraudulent transactions, validate payment methods, and block suspicious activity before it causes damage. It provides real-time IP geolocation, VPN/proxy detection, disposable email checks, and credit card BIN validation through a single REST API.

Most businesses discover they need a tool like Greip after absorbing chargebacks or dealing with fake signups that pollute their customer data. Greip sits between your payment flow and your database, checking each transaction or registration against known fraud patterns. It flags risky IP addresses, identifies users hiding behind VPNs or proxies, and validates whether an email address is disposable or legitimate.

At Osher, we connect Greip’s API into automated workflows using n8n so that fraud checks happen without manual review. A typical setup routes incoming form submissions or checkout events through Greip’s validation endpoints, then triggers different actions based on the risk score: approve, flag for review, or block outright. This removes the bottleneck of manual fraud screening while keeping false positives low. If you need fraud detection built into your existing systems, our system integration team can wire Greip into your payment stack, CRM, or customer onboarding flow.

Greip FAQs

Frequently Asked Questions

Common questions about how Greip consultants can help with integration and implementation

What does Greip actually do?

Greip is an API-based fraud prevention tool. You send it an IP address, email, phone number, or credit card BIN, and it returns risk intelligence: whether the IP is a known proxy or VPN, whether the email is disposable, what country the user is actually in, and whether the card BIN matches the claimed issuing bank. It processes these checks in real time, typically under 200ms per request.

How does Greip integrate with payment and checkout systems?

Greip exposes REST API endpoints that accept GET or POST requests. In a typical integration, your checkout flow sends a validation request to Greip before processing payment. The response includes a fraud score and specific flags (VPN detected, country mismatch, disposable email). You then use those flags to approve, reject, or queue the transaction for manual review. We build these integrations using n8n webhooks so the entire check runs automatically.

Can Greip detect users hiding behind VPNs or proxies?

What is BIN validation and why does it matter?

BIN (Bank Identification Number) validation checks the first six digits of a credit card number against a database of issuing banks. Greip tells you which bank issued the card, what country it was issued in, and whether it is a debit or credit card. This matters because a mismatch between the cardholder’s stated location and the card’s issuing country is a common fraud indicator.

How would Osher set up Greip for our business?

We start by mapping your existing payment or registration flow to identify where fraud checks should sit. Then we configure Greip API calls within an n8n workflow, setting up conditional logic based on the risk scores and flags Greip returns. The workflow connects to your existing systems, whether that is Stripe, WooCommerce, a custom checkout, or a CRM. Our automated data processing team handles the full setup.

Does Greip work for non-payment use cases like form spam?

Yes. Greip’s disposable email detection and IP intelligence work well for blocking fake signups, spam form submissions, and bot registrations. You can validate email addresses and IP addresses at the point of form submission, rejecting entries that come from disposable email providers or known bot networks. This keeps your CRM and mailing lists clean without adding CAPTCHAs or friction for real users.

How it works

We work hand-in-hand with you to implement Greip

As Greip consultants we work with you hand in hand build more efficient and effective operations. Here’s how we will work with you to automate your business and integrate Greip with integrate and automate 800+ tools.

Step 1

Process Audit

We review your current payment flow, registration forms, and customer onboarding process to identify where fraudulent activity is entering your systems. This includes examining chargeback rates, fake signup volumes, and any existing fraud screening you already have in place.

Step 2

Identify Automation Opportunities

Based on the audit, we pinpoint which Greip API endpoints will address your specific fraud problems. For payment fraud, that means BIN validation and IP geolocation checks at checkout. For spam signups, it means disposable email detection and proxy/VPN flagging on registration forms.

Step 3

Design Workflows

We map out the automated fraud-checking workflow in n8n, defining the trigger points (webhook from your checkout or form), the Greip API calls to make, and the conditional logic for handling different risk scores. We design separate paths for approved, flagged, and blocked transactions.

Step 4

Implementation

We build and deploy the n8n workflow, configuring Greip API authentication, request formatting, and response parsing. We connect the outputs to your existing systems: updating your CRM, sending Slack alerts for flagged transactions, or blocking high-risk submissions automatically.

Step 5

Quality Assurance Review

We test the workflow with known fraud scenarios (VPN connections, disposable emails, mismatched BIN data) and legitimate transactions to verify that the system catches real threats without blocking genuine customers. We tune the risk thresholds based on test results.

Step 6

Support and Maintenance

After launch, we monitor fraud detection rates and false positive levels, adjusting Greip’s scoring thresholds as your traffic patterns change. We also keep the n8n workflow updated if Greip releases new API features or if your payment stack changes.

Transform your business with Greip

Unlock hidden efficiencies, reduce errors, and position your business for scalable growth. Contact us to arrange a no-obligation Greip consultation.

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