Marketplace Security

Stop Fake Reviews,
Sellers & Listing Fraud.

Detect coordinated account networks, fake seller registrations, and review manipulation before they erode trust and harm real sellers.

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100k+

Disposable domains blocked

< 50ms

Scoring latency

Linked

Account network signals

The challenge

Fraud patterns that cost Marketplaces businesses the most

Fake reviews & rating manipulation

Coordinated bot networks post fake reviews to boost competitor rankings or suppress genuine sellers — destroying buyer trust across your platform.

Fraudulent seller accounts

Scammers register multiple seller accounts using VPNs and disposable emails to list counterfeit goods, take payments, and disappear.

Counterfeit listing networks

Organised fraud rings create hundreds of linked accounts to flood categories with counterfeit listings, evading simple per-account limits.

Buyer account abuse

Buyers exploit refund policies by cycling through throwaway accounts to claim fraudulent returns and drain your dispute resolution costs.

How it works

One API call. One decision. No extra vendor.

1

Send the context you have

Pass the IP, email, and user-agent from the seller_signup request — no extra data collection needed.

2

Get allow, challenge, or block

RequestGuard combines IP reputation, email signals, proxy detection, and device fingerprints into one structured decision.

3

Act in your app

Let low-risk sessions through, show a CAPTCHA on challenge, or block high-risk requests — with full audit trail in your dashboard.

Capabilities

Purpose-built signals for Marketplaces

01.

Account network detection

Identify linked accounts sharing IPs, ASNs, or email domains — exposing coordinated fraud rings even when they use different identities.

02.

Seller onboarding scoring

Score new seller applications with email risk, domain reputation, and IP intelligence to flag suspicious registrations before they go live.

03.

Proxy & VPN detection

Flag sellers and buyers hiding behind VPNs, Tor, or residential proxies — a strong signal of intent to evade account limits.

04.

Disposable email blocking

Stop throwaway inboxes from creating seller accounts, leaving fake reviews, or abusing buyer protection flows.

Integration

Two lines of code. Full fraud coverage.

Send the context you already collect. Get back a structured decision with risk factors — ready to act on without a separate lookup per signal.

View API docs Get API key
seller_signup.ts 
import RequestGuard from "@requestguard/js";

const guard = RequestGuard({ apiKey: "rg_sk_live_..." });

const decision = await guard.assess({
  ip:        req.ip,
  email:     body.email,
  userAgent: req.headers["user-agent"],
  event:     "seller_signup",
});

// decision: "review" — shared ASN with 12 flagged accounts
if (decision.decision === "block") {
  throw new Error("Request blocked");
}
if (decision.decision === "challenge") {
  return requireCaptcha();
}

Protect your marketplace's trust and search rankings.

Start with 1,000 free protected requests. No credit card required.

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