fraud-detection

fraud-detection is a skill for Claude Code, Codex from finsilabs/awesome-ecommerce-skills. It costs 31 tokens per session (2,600 once invoked), scanned A, original, MIT.

A guide to identifying suspicious online orders using risk scores, extra cardholder checks, purchase-speed limits, and human review.

In plain words
What is it for?
Use it to review high-risk orders, configure 3D Secure, check unusual purchase frequency, and investigate account takeovers or bulk bot purchases.
Why use it?
It helps reduce chargebacks, stolen goods, card testing, and other losses from fraudulent card-not-present purchases.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex; mentions Gemini CLI; mentions OpenCode.

Good fit Use it to review high-risk orders, configure 3D Secure, check unusual purchase frequency, and investigate account takeovers or bulk bot purchases.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/finsilabs/awesome-ecommerce-skills/fraud-detection
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add finsilabs/awesome-ecommerce-skills --skill fraud-detection
Clone the repo
git clone --depth 1 https://github.com/finsilabs/awesome-ecommerce-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for fraud-detection

README.md
[![agentmods](https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/fraud-detection/github.svg)](https://agentmods.dev/skills/finsilabs/awesome-ecommerce-skills/fraud-detection)
Your own site
<a href="https://agentmods.dev/skills/finsilabs/awesome-ecommerce-skills/fraud-detection"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/fraud-detection/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for fraud-detection

Your own site · 80×15
<a href="https://agentmods.dev/skills/finsilabs/awesome-ecommerce-skills/fraud-detection"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/fraud-detection.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,600 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.02600
Opus 5 $0.00015 $0.01300
Sonnet 5 $0.00006 $0.00520
Haiku 4.5 $0.00003 $0.00260

Measured 9d ago against content hash a548aac10874, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

fraud-detection scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/security-compliance/fraud-detection/SKILL.md · 234 lines

How it starts

The opening of the file, as written. The whole thing — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fraud Detection

Overview

Payment fraud costs e-commerce merchants 2–3% of revenue through chargebacks, lost goods, and dispute fees. Effective fraud detection layers platform-native risk scoring, 3D Secure authentication, velocity checks, and manual review queues for suspicious orders. The right approach depends on your platform — Shopify includes a built-in fraud analysis tool, while WooCommerce and BigCommerce require a dedicated fraud prevention service or payment processor's fraud tools.

When to Use This Skill

  • When chargeback rates exceed 0.5% of transaction volume (Visa's threshold for "excessive" disputes is 0.9%)
  • When launching in a new market with unfamiliar fraud patterns
  • When selling high-value, easily resold goods (electronics, gift cards, luxury items)
  • When you observe account takeover patterns, card testing, or bulk bot purchases
  • When building or auditing a checkout flow that processes card-not-present transactions

Core Instructions

Step 1: Determine the merchant's platform and choose the right fraud tools

Platform Built-in Fraud Analysis Recommended Fraud Service
Shopify Shopify Fraud Analysis (included free); basic risk scoring on orders Enable Stripe Radar or Signifyd (Shopify App Store) for advanced ML scoring
WooCommerce None built in Use Stripe (with Radar) or Braintree as payment processor; or install Kount or NoFraud plugin
BigCommerce Payment processor fraud tools (varies by processor) Signifyd integrates natively with BigCommerce; NoFraud also supports BigCommerce
All platforms Stripe Radar (if using Stripe) provides ML-based fraud scoring on every charge at no extra cost

Step 2: Enable and configure platform-native fraud tools


Shopify

Shopify includes a Fraud analysis indicator on every order based on signals like IP/billing address mismatch, card verification failure, and known fraud patterns.

Read the full file on GitHub · 234 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 234 lines · 31 tokens per session scan A a548aac10874

Subscribe to this mod's changes

fraud-detection is a skill published in the GitHub repository finsilabs/awesome-ecommerce-skills (52 stars, last pushed 6mo ago), licensed MIT. It adds 31 tokens to every session and 2,600 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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