EmailRep

Overview

EmailRep gives reputation scores for email addresses — risk level, suspicious flags, and historical behavior — useful for fraud prevention. It historically had a keyless API.

⚠️ Breaking change (verified 2026-08): the unauthenticated API is now disabled — requests without a key return HTTP 429 "the unauthenticated API is currently disabled. please use an API key". Register for a free key.

Quick Start

Reputation query (replace YOUR_KEY):

curl "https://emailrep.io/query/[email protected]" \
  -H "Key: YOUR_KEY"

{
  "email": "[email protected]",
  "reputation": "high",
  "suspicious": false,
  "references": 12,
  "details": { "blacklisted": false, "malicious_activity": false }
}

Authentication

• Register at emailrep.io → free API key (emailed).
• Send it as the Key header (missing → 429, verified).

Rate Limits & Notes

• Free tier: ~100 requests/day (check the docs); paid tiers scale.
• The response includes reputation (high/low), suspicious, references (how many sources), and details flags.
• The keyless tier was disabled in 2026 (verified) — the auth: No tag is outdated.

FAQ

Is EmailRep free? Free tier with daily limits; a key is now required (429 without, verified).

Why 429 without a key? The unauthenticated API was disabled in 2026 (verified) — register for a key.

What does it return? A reputation score plus risk flags for an email address.