EmailRep API

⭐ Beginner's Pick Security / No Auth Required Beginner HTTPS
Free to Use Varies (check documentation)

Overview

EmailRep is a free API that evaluates the risk and reputation of an email address in seconds. It checks signals like domain age, whether the email has been seen in data breaches, and social media presence to return a risk score. Developers use it to flag suspicious signups and reduce fraud without requiring user verification.

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Beginner Tip

No API key is required for basic lookups — just send a GET request with the email address in the URL path. For higher rate limits and more detailed signals, register for a free API key at emailrep.io.

Available Data

email delivery status
message ID
bounce/complaint data
open/click tracking
prediction result with confidence score
input name or text

Example Response

JSON Response
{
  "message_id": "msg_abc123def456",
  "status": "delivered",
  "to": "[email protected]",
  "subject": "Welcome!",
  "timestamp": "2025-01-15T10:30:00Z"
}

Field Reference

email The email address that was queried.
reputation Overall reputation rating: high, medium, low, or none.
suspicious True if the email shows signals of suspicious or fraudulent behavior.
references Number of times this email has appeared in known data sources or breaches.
details.blacklisted True if the email or its domain is on a known spam or abuse blacklist.
details.domain_age Age category of the email domain, such as new (less than 1 year) or old.

Implementation Example

const url = "https://docs.emailrep.io/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

400 Bad Request The email address in the URL path is malformed or empty.
Ensure the email is URL-encoded and follows the standard [email protected] format.
429 Too Many Requests Unauthenticated requests have a very low rate limit (a few per day).
Add a free API key in the Key header to get a much higher quota.
Unexpected null fields Some reputation signals are unavailable for newly registered or rare domains.
Check for null before using any field in your code — treat null as unknown, not safe.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 20/20
🔒 Security 15/15
🛠 Developer XP 15/20
✓ Reliability 15/15
Response Time 36ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS UNKNOWN
Category Security
Difficulty Beginner
Verified: 2026-04-07

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