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Payment fraud intelligence for Shopify and Whop merchants

Every business has a normal.
Greenstreet learns yours.

Greenstreet MMO learns how your store usually takes payments, links unusual activity into a single incident and shows your team exactly what changed, with the evidence attached.

Talk to us See how it works
Companies House Registered with Companies HouseFINPAY ONE LTD · Company no. 17473434 View record
Follow Greenstreet MMO @GreenstreetMMO Payment-fraud intelligence for Shopify and Whop merchants. Learn your normal. Investigate what changes. x.com/GreenstreetMMO
Kestrel GoodsShopify
MonitoringToday, 02:24
Attempts · last 10 min
84
Usual at this hour: 0–4
Declined
94%
Usual: 4%
New accounts
91%
Usual: 22%
Authorised & linked
5
Fulfilment held

Payment attempts per 10 minutes

Your usual rangeToday

Recent payments

Select a payment to inspect it
TimeOrderCustomerCardAmountStatus

Why merchant-specific

80 attempts in ten minutes. Attack, or a busy Friday?

It depends on the merchant. A single global threshold misses bursts at small stores and floods busy ones with alerts. Greenstreet compares every pattern with your own history, then checks whether other signals moved with it.

Choose a merchant

Investigate27× this store’s busiest ten minutes

For a store this size, 80 attempts is far outside anything in its history.

  • Volume27× usual peak
  • Declines34% vs usual 4%
  • New accounts71% vs usual 20%

Volume alone is never the verdict. At a high-volume store the same 80 attempts can be a normal peak while the decline pattern still deserves a look.

How it works

From connected store to a clear incident.

  1. 01

    Connect your store

    Link Shopify or Whop with the permissions you choose. Greenstreet reads payments, orders and customer history.

  2. 02

    Learn your normal

    A baseline built from your own history: volume by hour, order values, decline rates, returning customers, regions and account age.

  3. 03

    Link the signals

    When several signals move together, Greenstreet groups them into one incident with a timeline, instead of a stream of separate alerts.

  4. 04

    Respond with evidence

    Flag, notify, hold fulfilment or pause access where your platform allows it. The evidence stays with the incident for disputes.

Signals

Eight signals, read together.

One odd payment is noise. Several signals moving at once is a pattern. Greenstreet weighs the combination against your baseline, not a global average.

  • Velocity

    Attempts per minute compared with what is usual for this hour and day.

    21× usual
  • Repeated card attempts

    Many cards tried in quick succession, often at your lowest price point.

    61 cards · 3 devices
  • Decline pattern

    Clusters of declines and the reasons behind them, such as incorrect CVC.

    94% declined
  • New accounts

    First-time and guest accounts as a share of your usual customer mix.

    91% new
  • Location

    Billing, shipping and connection countries that don’t match your regions.

    3 new countries
  • IP reputation

    Traffic from proxies, VPN exits and data-centre ranges.

    Data-centre ranges
  • Device

    Several cards or accounts sharing one browser or device.

    1 device · 24 cards
  • Automation

    Checkout timing too fast or too regular to be a person.

    2.1 s per checkout

Some signals, such as device and network data, need sources beyond platform APIs. Availability depends on your integration and settings.

Investigation

Every incident arrives with its evidence.

Drag through the timeline. Greenstreet keeps the order of events, the payments involved, the signals that moved and every response in one place, so nobody has to rebuild the story from exports.

  • The first attempt and every linked payment, in order
  • Which signals moved, and by how much against your normal
  • What was done, when, and by whom
IncidentGS-2841 · Card-testing burst
02:21:00
Attempts
84
Declined
79
Authorised
5
Signals linked
5

    Platforms

    Built for Shopify and Whop merchants.

    Physical goods and digital products attract different fraud. Greenstreet learns the patterns of each and responds through the controls your platform provides.

    Shopify

    Physical and digital goods
    Reads
    Orders, transactions, customers, fulfilment status and platform risk indicators.
    Common patterns
    Card testing on low-priced products, stolen cards on high-value orders, refund and chargeback abuse.
    Responses
    Flag orders, notify your team, hold fulfilment before anything ships.

    Whop

    Memberships, courses and digital access
    Reads
    Payments, attempts and failure reasons, memberships and customer history.
    Common patterns
    Bulk purchases with stolen cards, disputes after access is used, repeated accounts from one source.
    Responses
    Flag payments, notify your team, pause access where your permissions allow.

    Shopify and Whop are trademarks of their respective owners. Greenstreet MMO is independent and not affiliated with or endorsed by either platform.

    Company

    Merchant Monitoring & Operations.

    Greenstreet MMO is a payment fraud intelligence company for independent merchants. We start from a simple idea: fraud is a change from normal, and every business has a different normal.

    Founded by Matteo Montanelli. Registered in England and Wales.

    Official company record
    Company name
    FINPAY ONE LTD
    Company number
    17473434
    Registered in
    England and Wales
    Registered office
    71–75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom
    View on Companies House
    Official X account
    Greenstreet MMO@GreenstreetMMO

    Card-testing patterns, fraud trends from Shopify and Whop, and product updates from the team. Message us there too.

    Follow @GreenstreetMMO

    Contact

    Tell us how your business takes payments.

    Share your platform, rough volume and what you are seeing. Matteo reads every enquiry and replies by email.

    1. You tell us what’s happeningCard testing, disputes, spam payments or something you can’t explain yet.
    2. We look at your contextYour platform, your volumes and the patterns that matter for your store.
    3. You decideIf Greenstreet fits, we agree how to connect your store.
    Email[email protected] X@GreenstreetMMO

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    FAQ

    Questions merchants ask.

    What does Greenstreet MMO do?

    It monitors payment activity for Shopify and Whop merchants, learns what is normal for your store and flags changes that look like fraud: card testing, stolen-card payments, account abuse and patterns that lead to chargebacks. Related signals are grouped into one incident with a timeline and evidence.

    How is this different from my platform’s built-in fraud checks?

    Platform checks score individual payments. Greenstreet looks at your store over time: whether volume, declines, account age, locations and devices are moving together compared with your own history. It works alongside the checks you already have.

    Does Greenstreet change my checkout?

    Monitoring works from the data your platform provides. Responses such as holding fulfilment or pausing access only happen through the permissions and rules you choose.

    What data does it need?

    Payments, orders and customer history from your platform. Some signals, such as device and network reputation, need additional data sources. We confirm what is available for your setup before you connect.

    Which platforms are supported?

    Greenstreet is built for merchants on Shopify and Whop. If you sell elsewhere as well, tell us in the form.

    What does it cost?

    Pricing depends on your payment volume and platforms. Tell us about your store and we will share the details by email.

    What does MMO stand for?

    Merchant Monitoring & Operations.