Hunter

Overview

Hunter finds and verifies professional email addresses — domain search (find emails at a company), email finder (guess a person’s email), and email verification. Auth is a free API key (an invalid key returns 401, verified).

Quick Start

Domain search (replace YOUR_KEY):

curl "https://api.hunter.io/v2/domain-search?domain=example.com&api_key=YOUR_KEY"

{
  "data": {
    "domain": "example.com",
    "organization": "Example Inc.",
    "emails": [
      { "value": "john@example.com", "type": "personal", "confidence": 95, "first_name": "John", "last_name": "Doe" }
    ],
    "pattern": "{first}.{last}@example.com"
  }
}

Email verification:

curl "https://api.hunter.io/v2/email-verifier?email=john@example.com&api_key=YOUR_KEY"

Authentication

• Register at hunter.io → free API key (in the dashboard).
• Send it as the api_key query parameter (invalid key → 401, verified).

Rate Limits & Notes

• Free tier: 25 searches/month + 50 verifications/month (check current docs) — small; paid plans scale.
• Endpoints: /v2/domain-search (find emails), /v2/email-finder (guess by name), /v2/email-verifier (check deliverability).
• pattern in domain-search reveals the email format convention at that company.
• confidence (0-100) accompanies each found email.

FAQ

Is Hunter free? Free tier with a small monthly allowance; more is paid.

How do I get a key? Register at hunter.io — the key is on your dashboard.

What’s the difference between the endpoints? domain-search finds existing emails; email-finder guesses addresses; email-verifier checks deliverability.