Hunter.io

Email finding and verification platform for outreach and link building.

Capabilities

Integration	Available	Notes
API	✓	REST API for domain search, email finder, verification
MCP	-	Not available
CLI	✓	Zero-dependency Node.js CLI
SDK	-	API-only

Authentication

• Type: API Key (query parameter)
• Parameter: api_key={key}
• Env var: HUNTER_API_KEY
• Get key: Hunter dashboard > API

Common Agent Operations

Find emails for a domain

node tools/clis/hunter.js domain search --domain example.com --limit 10

Find a specific person's email

node tools/clis/hunter.js email find --domain example.com --first-name John --last-name Doe

Verify an email address

node tools/clis/hunter.js email verify --email john@example.com

Count emails available for a domain

node tools/clis/hunter.js domain count --domain example.com

Manage leads

# List leads
node tools/clis/hunter.js leads list --limit 20

# Create a lead
node tools/clis/hunter.js leads create --email john@example.com --first-name John --last-name Doe --company "Example Inc"

# Delete a lead
node tools/clis/hunter.js leads delete --id 12345

Manage campaigns

# List campaigns
node tools/clis/hunter.js campaigns list

# Get campaign details
node tools/clis/hunter.js campaigns get --id 12345

# Start/pause a campaign
node tools/clis/hunter.js campaigns start --id 12345
node tools/clis/hunter.js campaigns pause --id 12345

Check account usage

node tools/clis/hunter.js account info

Rate Limits

• Free plan: 25 searches/month, 50 verifications/month
• Paid plans scale with tier
• API rate limit: 10 requests/second

Use Cases

• Link building: Find email contacts at target domains for outreach
• Prospecting: Build lead lists from company domains
• Verification: Clean email lists before sending campaigns