Hunter

Authentication Type: API Key Description: Find email addresses associated with a domain, locate a specific person's email, and verify email deliverability using the Hunter.io API.

Authentication

To authenticate with Hunter, you'll need an API key from your Hunter.io account:

1. Sign up or log in at Hunter.io
2. Navigate to your API page in account settings
3. Copy your API key

You'll need to provide:

• apiKey string: Your Hunter.io API key

Security tip: Hunter provides separate API keys for different use cases. Use a dedicated key for your Cotera integration and rotate it if compromised.

Domain Search

Find all email addresses associated with a domain name. Returns contact details including names, job titles, seniority levels, departments, and social profiles. Useful for prospecting and building contact lists for a target company.

Operation Type: Query (Read)

Parameters:

• domain string (required): Domain name to search for email addresses (e.g., "stripe.com")
• type string (nullable): Filter by email type: "personal" or "generic". Null returns both.
• seniority string (nullable): Comma-separated seniority filter: "junior", "senior", "executive"
• department string (nullable): Comma-separated department filter: "executive", "it", "finance", "management", "sales", "legal", "support", "hr", "marketing", "communication"
• limit number (nullable): Maximum number of email results to return (1-100, default 10)

Returns:

• domain string: The searched domain
• organization string (nullable): Organization name associated with the domain
• pattern string (nullable): Most common email pattern for the domain (e.g., "{first}.{last}")
• emails array of objects: List of email addresses found
  • value string: The email address
  • type string: Email type: "personal" or "generic"
  • confidence number: Confidence score from 0 to 100
  • first_name string (nullable): Contact's first name
  • last_name string (nullable): Contact's last name
  • position string (nullable): Contact's job title
  • seniority string (nullable): Seniority level: "junior", "senior", or "executive"
  • department string (nullable): Department the contact belongs to
  • linkedin string (nullable): LinkedIn profile URL
  • twitter string (nullable): Twitter handle

Example Usage:

{
  "domain": "stripe.com",
  "department": "sales,marketing",
  "seniority": "senior,executive",
  "limit": 20
}

Email Finder

Find the most likely email address for a specific person given their first name, last name, and company domain. Returns the email with a confidence score and additional profile information including job title and social links.

Operation Type: Query (Read)

Parameters:

• domain string (required): Domain name of the company (e.g., "stripe.com")
• firstName string (required): The person's first name (case-insensitive)
• lastName string (required): The person's last name (case-insensitive)

Returns:

• email string (nullable): The most likely email address found
• score number: Confidence score from 0 to 100
• firstName string: The person's first name
• lastName string: The person's last name
• domain string: The domain searched
• position string (nullable): The person's job title if found
• company string (nullable): The company name if found
• linkedinUrl string (nullable): LinkedIn profile URL if available
• twitterHandle string (nullable): Twitter handle if available

Example Usage:

{
  "domain": "stripe.com",
  "firstName": "Patrick",
  "lastName": "Collison"
}

Email Verifier

Verify whether an email address is deliverable. Returns detailed verification results including deliverability status, confidence score, and technical checks such as MX records, SMTP server availability, and disposable email detection.

Operation Type: Query (Read)

Parameters:

• email string (required): The email address to verify (e.g., "john@example.com")

Returns:

• email string: The email address that was verified
• result string: Verification result: "deliverable", "undeliverable", "risky", or "unknown"
• score number: Confidence score from 0 to 100
• status string: Detailed status: "valid", "invalid", "accept_all", "webmail", "disposable", "unknown"
• disposable boolean: Whether the email domain is a disposable email service
• webmail boolean: Whether the email is from a webmail provider (Gmail, Yahoo, etc.)
• acceptAll boolean: Whether the mail server accepts all email addresses
• mxRecords boolean: Whether MX records exist for the domain
• smtpServer boolean: Whether the SMTP server was found
• smtpCheck boolean: Whether the SMTP check passed
• block boolean: Whether the email is blocked

Example Usage:

{
  "email": "patrick@stripe.com"
}

Common Use Cases

Sales Prospecting:

• Search for decision-makers at target companies by domain
• Filter by seniority and department to find the right contacts
• Combine Domain Search with Email Finder for targeted outreach

Lead Enrichment:

• Find email addresses for leads where you only have a name and company
• Verify existing email lists before launching outreach campaigns
• Enrich CRM records with verified email addresses

Email List Hygiene:

• Verify email addresses before sending cold outreach to improve deliverability
• Detect disposable and webmail addresses in your contact database
• Check MX records and SMTP validity to reduce bounce rates

Account-Based Marketing:

• Map out all contacts at target accounts using Domain Search
• Identify email patterns for companies to predict new contact emails
• Build department-specific contact lists for multi-threaded outreach