---
title: Hunter io
description: Find and verify professional email addresses
---

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{/* MANUAL-CONTENT-START:intro */}
[Hunter.io](https://hunter.io/) is a leading platform for finding and verifying professional email addresses, discovering companies, and enriching contact data. Hunter.io provides robust APIs for domain search, email finding, verification, and company discovery, making it an essential tool for sales, recruiting, and business development.

With Hunter.io, you can:

- **Find email addresses by domain:** Search for all publicly available email addresses associated with a specific company domain.
- **Discover companies:** Use advanced filters and AI-powered search to find companies matching your criteria.
- **Find a specific email address:** Locate the most likely email address for a person at a company using their name and domain.
- **Verify email addresses:** Check the deliverability and validity of any email address.
- **Enrich company data:** Retrieve detailed information about companies, including size, technologies used, and more.

In Sim, the Hunter.io integration enables your agents to programmatically search for and verify email addresses, discover companies, and enrich contact data using Hunter.io’s API. This allows you to automate lead generation, contact enrichment, and email verification directly within your workflows. Your agents can leverage Hunter.io’s tools to streamline outreach, keep your CRM up-to-date, and power intelligent automation scenarios for sales, recruiting, and more.
{/* MANUAL-CONTENT-END */}

## Usage Instructions

Search for email addresses, verify their deliverability, discover companies, and enrich contact data using Hunter.io's powerful email finding capabilities.



## Tools

### `hunter_discover`

Returns companies matching a set of criteria using Hunter.io AI-powered search.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `query` | string | No | Natural language search query for companies |
| `domain` | string | No | Company domain names to filter by |
| `headcount` | string | No | Company size filter \(e.g.,  |
| `company_type` | string | No | Type of organization |
| `technology` | string | No | Technology used by companies |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |

### `hunter_domain_search`

Returns all the email addresses found using one given domain name, with sources.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `domain` | string | Yes | Domain name to search for email addresses |
| `limit` | number | No | Maximum email addresses to return \(default: 10\) |
| `offset` | number | No | Number of email addresses to skip |
| `type` | string | No | Filter for personal or generic emails |
| `seniority` | string | No | Filter by seniority level: junior, senior, or executive |
| `department` | string | No | Filter by specific departments \(e.g., sales, marketing\) |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |

### `hunter_email_finder`

Finds the most likely email address for a person given their name and company domain.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `domain` | string | Yes | Company domain name |
| `first_name` | string | Yes | Person |
| `last_name` | string | Yes | Person |
| `company` | string | No | Company name |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |

### `hunter_email_verifier`

Verifies the deliverability of an email address and provides detailed verification status.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `email` | string | Yes | The email address to verify |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |

### `hunter_companies_find`

Enriches company data using domain name.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `domain` | string | Yes | Domain to find company data for |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |

### `hunter_email_count`

Returns the total number of email addresses found for a domain or company.

#### Input

| Parameter | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `domain` | string | No | Domain to count emails for \(required if company not provided\) |
| `company` | string | No | Company name to count emails for \(required if domain not provided\) |
| `type` | string | No | Filter for personal or generic emails only |
| `apiKey` | string | Yes | Hunter.io API Key |

#### Output

| Parameter | Type | Description |
| --------- | ---- | ----------- |
| `results` | json | Search results |
| `emails` | json | Email addresses found |
| `email` | string | Found email address |
| `score` | number | Confidence score |
| `result` | string | Verification result |
| `status` | string | Status message |
| `total` | number | Total results count |
| `personal_emails` | number | Personal emails count |
| `generic_emails` | number | Generic emails count |



## Notes

- Category: `tools`
- Type: `hunter`
