hunter

name	hunter
display_name	Hunter.io
description	Find verified business emails by company domain, find a specific person's email, and verify email deliverability
category	sales
icon	mail
skill_type	sandbox
catalog_type	platform
requirements	httpx>=0.25
resource_requirements	[{"env_var":"HUNTER_API_KEY","name":"Hunter.io API Key","description":"API key from Hunter.io (Dashboard > API & Integrations > API Keys)"}]
tool_schema	{"name":"hunter","description":"Find verified business emails by company domain, find a specific person's email, and verify email deliverability","parameters":{"type":"object","properties":{"action":{"type":"string","description":"Which operation to perform","enum":["domain_search","email_finder","email_verifier","email_count"]},"domain":{"type":"string","description":"Company domain — for domain_search, email_finder, email_count (e.g. 'stripe.com')","default":""},"first_name":{"type":"string","description":"First name — for email_finder (e.g. 'John')","default":""},"last_name":{"type":"string","description":"Last name — for email_finder (e.g. 'Smith')","default":""},"email":{"type":"string","description":"Email address — for email_verifier","default":""},"seniority":{"type":"string","description":"Filter by seniority — for domain_search. Comma-separated: junior, senior, executive","default":""},"department":{"type":"string","description":"Filter by department — for domain_search. Comma-separated: executive, it, finance, management, sales, legal, support, hr, marketing, communication, education, design, health, operations","default":""},"limit":{"type":"integer","description":"Max results (1-100) — for domain_search","default":10},"offset":{"type":"integer","description":"Results offset — for domain_search pagination","default":0}},"required":["action"]}}

Hunter.io

Find verified business emails by company domain, locate specific people's emails, and verify email deliverability.

Recommended Workflow for Lead Outreach

1. Use Apollo search_people to find leads with person IDs and company domains.
2. Use Hunter domain_search to find all emails at a company domain — faster and cheaper than Apollo enrichment.
3. Use Hunter email_finder with first_name + last_name + domain to find a specific person's email.
4. Use Hunter email_verifier to check deliverability before sending outreach.

Be Proactive

• When the user has leads from Apollo with company domains, immediately use domain_search to find emails at those domains.
• When you have a person's name and domain, use email_finder directly — don't ask for confirmation.
• Always verify emails before adding to outreach lists.
• Process multiple domains/emails in sequence without asking permission.

Actions

domain_search

Find all email addresses at a company domain. Filter by seniority (executive, senior, junior) and department (sales, marketing, executive, etc.).

action: domain_search
domain: "intercom.com"
seniority: "executive,senior"
department: "executive,marketing"
limit: 10

Returns: email, first_name, last_name, position, seniority, department, confidence score, verification status.

email_finder

Find a specific person's email by name + domain.

action: email_finder
domain: "intercom.com"
first_name: "John"
last_name: "Smith"

Returns: email, confidence score, position, LinkedIn URL, phone number, verification status.

email_verifier

Verify if an email address is deliverable.

action: email_verifier
email: "[e-mail]"

Returns: status (valid/invalid/accept_all/unknown), result (deliverable/undeliverable/risky), confidence score.

email_count

Quick count of available emails at a domain (free, no credits used).

action: email_count
domain: "intercom.com"

Returns: total emails, personal vs generic breakdown, count by department and seniority.