Deterministic signup risk review
Explainable abuse triage before a signup becomes an account.
Score lightweight signup metadata for SaaS trials, waitlists, lead forms, and invite flows. Get a compact risk score, reason codes, field-level signals, and a clear allow / review / block recommendation.
- v1 focus
- Workflow triage
- Access
- RapidAPI marketplace
- Signals
- Email, IP, source, timing
What it reviews
Practical signals for the messy edge of signup forms.
The API is built for the point where you need a consistent first-pass review without wiring several enrichment services into a small product workflow.
Domain and account hints
Disposable domains, role accounts, obvious typos, and suspicious email patterns.
Deterministic network checks
Malformed input, private or reserved addresses, and globally routable IP classification.
Context gaps
Missing referrer, absent website, unusual user agent, stale timestamp, and repeat attempts.
Actionable output
Risk score, confidence, reason codes, compact reasons, and a machine-friendly recommendation.
Response contract
Compact enough for automation. Explainable enough for review queues.
Runtime responses keep reason details tight for branching logic. Human-readable explanations stay available through the dedicated explain endpoint.
{
"request_id": "req_01hz9p8w2x",
"risk_score": 74,
"recommendation": "review",
"confidence": "medium",
"reason_codes": [
"disposable_email_domain",
"private_or_reserved_ip"
],
"reasons": [
{ "code": "disposable_email_domain", "severity": "high", "score_delta": 35 },
{ "code": "private_or_reserved_ip", "severity": "medium", "score_delta": 20 }
],
"signals": {
"email": { "domain_type": "disposable" },
"ip": { "is_global_ip": false }
}
}How teams use it
Add a review gate without rebuilding your signup flow.
Send signup metadata
Pass email, IP, source fields, user agent, timestamp, and prior attempt count when available.
Branch on recommendation
Allow low-risk signups, route unclear submissions for review, and block obvious abuse patterns.
Show your own policy
Use reason codes to power internal queues, admin notes, or no-code automation paths.
API surface
Focused endpoints for launch-ready integration.
POST /v1/review-signup
Full signup metadata review with risk score, recommendation, reason codes, reasons, and signals.
POST /v1/check-email
Email-focused review for domains, role accounts, typos, and compact reason output.
POST /v1/check-ip-context
Derived IP context for malformed, private, reserved, and globally routable address checks.
POST /v1/explain
Human-readable descriptions for reason codes, designed for docs, queues, and support context.
GET /health
Simple uptime check for platform health probes and status monitors.
Clear boundaries
A triage API, not a fraud verdict.
SaaS Signup Abuse Review does not verify identity, guarantee fraud prevention, provide compliance screening, or enrich IPs with geolocation, ASN, VPN, or proxy vendor data in v1. It gives deterministic workflow signals that your application can combine with its own limits, policies, and review process.
Available on RapidAPI