Know Your Residential IPs Before You Send

Cold email agencies and tool builders lose campaigns when routing through residential IPs without reputation data. Check SMTP reputation, active blacklist status, and bounce history in real-time.

50M+

Residential IPs tracked

<1ms

API response time

curl https://api.reputation.local/score \
  -H "Authorization: Bearer sk_prod_xyz" \
  -d '{"ip": "203.0.113.42"}'

{
  "ip": "203.0.113.42",
  "score": 8200,
  "rbl_status": "clean",
  "smtp_reputation": 92,
  "bounce_rate_30d": "0.8%",
  "recommendation": "safe_to_send"
}

Why IP Reputation Matters

No More Silent Bounces

Discover reputation issues before they damage sender metrics. Know which residential IPs are actually clean.

Prevent Blacklisting

Real-time checks across 150+ RBLs. Route only through IPs not on any major blacklist.

Higher Deliverability

ISPs reputation-score IPs in real-time. Clean residential IPs hit inboxes. Dirty ones hit spam folders.

Multi-Tenant Safe

Score per-IP before assignment. Prevent one bad actor from contaminating your entire pool.

Fast Integration

REST API or webhook. Add scoring to your routing logic in under 5 minutes.

Compliance Ready

CAN-SPAM, GDPR-aware. All queries are logged and auditable for your legal team.

Typical Cold Email Tool Integration

async function selectIP(recipients) {
  const ips = await getPool();
  const scored = await Promise.all(
    ips.map(ip => reputation.score(ip))
  );
  const clean = scored
    .filter(s => s.recommendation === 'safe_to_send')
    .sort((a, b) => b.score - a.score);
  
  return clean[0].ip;
}

Simple Per-Lookup Pricing

Pay for what you use. No monthly commitments. Free tier included.

Starter

Free

For agencies testing reputation scoring

50 lookups/month
Email support
REST API

Professional

$0.05

Per lookup after first 1,000/mo

1,000 free lookups monthly
Priority email support
Webhook callbacks
Batch scoring endpoint

Enterprise

Custom

For large-scale resellers

Volume-based pricing
Dedicated support engineer
White-label API
SLA guarantees

How Reputation Scoring Works

Each residential IP receives a reputation score (0-10000) based on realtime signals across our ProxyBox network and public reputation sources.

Signal 1: RBL Status

Checked against 150+ major blacklists. A single RBL listing = safe_to_avoid recommendation.

Signal 2: SMTP Patterns

Bounce rate, complaint rate, and authentication pass rate over the last 30 days from our ProxyBox routing logs.

Signal 3: ASN History

Does this IP's ASN have a reputation for spam? ProxyBox customers report which carriers host clean residential pools.

FAQ

Can I use this for commercial cold email?

Yes. Our API is designed for commercial cold email agencies, tooling, and white-label SaaS platforms. CAN-SPAM and GDPR compliant.

How often are scores updated?

Real-time. We refresh each IP's reputation state every time one of our 50M+ network events occurs. API call returns the freshest available data (sub-1ms).

Can I get webhook notifications on reputation changes?

Yes. Professional and Enterprise plans include webhook callbacks when an IP enters or leaves a major RBL, or when bounce rate exceeds your threshold.

Do you offer white-label or resale options?

Yes. Enterprise accounts can white-label the API and resell reputation scoring to their end customers. Contact sales for terms.

What about false positives on RBLs?

Some RBLs are overly aggressive. Our recommendation engine weighs RBL status against SMTP performance. If an IP is clean on bounce/complaint but listed by one RBL, we flag it for your review rather than blocking sends outright.

IP Reputation Scoring API