Loss Prevention for Square

Your store has a Canary in the data mine.

Real-time fraud detection, case management, and immutable audit trails for Square merchants. One location or twenty — enterprise-grade loss prevention at a price that makes sense.

How It Works

37 detection rules live

2-click Square install

First alert in under 5 min

Canary Dashboard — Downtown Location

Critical

High

$2,847

Recovered

Critical Refund to non-original card — Employee #4182 2m ago

High 5 refunds in 45 min — Employee #2291 14m ago

Medium After-hours POS activity — 11:42 PM 6h ago

High Manual entry spike — 12 in last hour 1d ago

How It Works

Connect Square. Get Alerts.

Canary connects to your Square account through the official OAuth flow. No code, no IT team, no configuration. Install from the Square App Marketplace and your first alerts arrive within minutes.

Connect Your Store

Click Install in the Square App Marketplace. Authorize Canary to read your transaction data. Canary ingests the past 30 days of transactions and begins analyzing immediately.

Detect Patterns

Chirp — our detection engine — evaluates every transaction in real time as it arrives via Square webhooks. 37 rules across 10 categories analyze refund patterns, employee behavior, timing anomalies, and velocity spikes.

Act on Evidence

Every alert links to the triggering transaction, the detection rule, the employee, and the severity grade. When you need to investigate, Fox provides structured case management with a complete evidence chain and documented resolution workflows.

Join the Flock

Early Access

We're Building This With Operators.

Canary is in early access. We're looking for Square merchants who want real loss prevention — not another dashboard nobody checks. Early partners get free access, direct input on what we build next, and a seat at the table as Canary grows. If you run a retail operation and shrink keeps you up at night, we should talk.

What Early Partners Get

Full platform access — all 37 detection rules
Direct line to the team building it
Your feedback shapes the roadmap
Free while we're in early access

What We're Looking For

Square merchants with 2+ locations
Operators who care about shrink
Willingness to share honest feedback
Any industry — retail, food, services

Request Early Access

No credit card. No commitment. Just a conversation.

Detection Engine

Chirp: 37 Rules. 10 Categories. 3 Tiers.

Every rule is based on real-world loss prevention patterns from 30+ years of retail operations experience. 10 categories cover payments, cash drawer, orders, timecards, voids, gift cards, loyalty, disputes, invoices, and composite risk scoring. Not theoretical. Not machine learning guessing at fraud. These are the rules that catch real theft.

Showing all 37 rules across 10 categories

Rule	Trigger Condition	Default Severity	Category
Rapid Refund	Refund within 15 min of sale	High	Payment
Excessive Refund Rate	Refund rate >15% of shift transactions	High	Payment
Round Amount Pattern	5+ round-dollar transactions per hour	Medium	Payment
After-Hours Transaction	Transaction outside business hours	Medium	Payment
Card Velocity	Same card 5+ times per hour	High	Payment
Split Tender Pattern	3+ split-tender transactions per hour	Medium	Payment
High Value Refund	Single refund >$100	High	Payment
Manual Entry Spike	5+ keyed-in cards per shift	Medium	Payment
Square Delay Hold	Square flagged delay hold	Critical	Payment
Partial Authorization	Bank approved less than requested	High	Payment
No Sale Detected	Cash drawer opened, no transaction	High	Payment
No-Sale Abuse	5+ no-sale drawer opens per shift	High	Cash Drawer
Cash Variance	Shift variance >$20	High	Cash Drawer
Paid-Out Anomaly	Paid-out >$50 without override	Medium	Cash Drawer
After-Hours Drawer	Drawer opened after hours	Critical	Cash Drawer
Excessive Discount Rate	Average discount >50%	High	Order
Line Item Void Rate	Void rate >10%	High	Order
Sweethearting	Discount without approval >$20	High	Order
Untendered Order	Order with no payment for 24+ hours	Critical	Order
Off-Clock Transaction	Transaction with no open timecard	Critical	Timecard
Break Transaction	Transaction during declared break	High	Timecard
Wrong Location	Clocked in at different location	High	Timecard
High Void Rate	5+ voids per shift	High	Void
Post-Void Alert	Full refund of completed sale	Critical	Void
Gift Card Load Velocity	3+ gift card loads per hour	High	Gift Card
Gift Card Drain	Full redeem immediately after load	Critical	Gift Card
Rapid Point Accumulation	5+ point events per hour	Medium	Loyalty
Bulk Redemption	5000+ points in single event	High	Loyalty
Cross-Location Velocity	3+ locations in 2 hours	High	Loyalty
Enrollment Fraud	10+ enrollments per day per employee	Medium	Loyalty
SRA Threshold Breach	Shrink risk >3% of sales	High	Composite
Dispute Created	New dispute filed	High	Dispute
Dispute Lost	Dispute lost — chargeback	Critical	Dispute
Dispute Velocity	3+ disputes in 30 days	High	Dispute
Invoice Overdue	Past due, still unpaid	Medium	Invoice
Invoice Charge Failed	Scheduled charge failed	High	Invoice
High Value Invoice Unpaid	Unpaid invoice >$500	High	Invoice

Something missing? Let's build together!