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Hunter.io API

Email Finder

Find and verify professional email addresses from domains.

Hunter.io helps you find email addresses associated with any domain. Verify emails, find decision-makers, and build targeted outreach lists.

Details

Auth Type
API Key (api_key param)
Rate Limit
30 requests/minute
Pricing
Free tier: 25 searches/mo
Full Docs
Step 1: Save your provider key

This is NOT your Callio key. Enter the API key from the provider's dashboard (e.g. The API key from the provider's dashboard).

API Key (api_key param)

Sign up at hunter.io and get your API key from the dashboard.

Get API Credentials

Getting Started

1

Try It Instantly

Click "Try It" above to test the API in the playground

2

Add to Your Agent

Click "Add to Agent" to get your API key and integrate

Common Use Cases

Email discovery
Email verification
Lead generation
Domain search
Outreach automation

💻 Code Examples

Get started quickly with these code examples in your favorite language

curl -X GET \
  'https://callio.app/api/proxy/hunter/forward?target=https%3A%2F%2Fapi.hunter.io%2Fv2%2Fendpoint' \
  -H 'Authorization: Bearer YOUR_CALLIO_KEY' \
  -H 'Content-Type: application/json'

💡 Tip: Replace YOUR_CALLIO_KEY with your actual Callio API key from the dashboard.

Ready to integrate Hunter.io API?

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