Hunter API: Overview

Build powerful, automated email outreach workflows.

Hunter's API is robust and reliable. Get started in minutes.

Automate your search for valid email addresses.

Programmatically identify your target audience. Use natural language or robust filters to find companies aligned with your ICP.

Discover API

Using the Domain Search API, you can fetch all email addresses Hunter found for a given domain. All you need is the domain name and a simple API call.

Domain Search API

Start with a person’s name and a domain name, and get a professional email in the payload. The Email Finder API also returns a confidence score and additional information about the returned email address.

Email Finder API

Using the Email Verifier API, you can programmatically verify the validity of an email address. With each verified email, you also get a confidence score.

Email Verifier API

{
    "data": [
      {
        "domain": "cloudflare.com",
        "organization": "Cloudflare",
        "emails_count": {
          "personal": 615,
          "generic": 323,
          "total": 938
        }
      },
      {
        "domain": "oracle.com",
        "organization": "Oracle",
        "emails_count": {
          "personal": 512,
          "generic": 256,
          "total": 768
        }
      }
    ],
    "meta": {
      "results": 1,
      "limit": 100,
      "offset": 0,
      "params": {
        "query": "US-based Software companies"
      },
      "filters": {
        "headquarters_location": {
          "include": [
            {
              "country": "US"
            }
          ]
        },
        "industry": {
          "include": [
            "IT Services and IT Consulting"
          ]
        }
      }
    }
  }
}

{
  "data": {
    "domain": "intercom.com",
    "disposable": false,
    "webmail": false,
    "accept_all": true,
    "pattern": "{first}",
    "organization": "Intercom",
    "emails": [
      {
        "value": "ciaran@intercom.com",
        "type": "personal",
        "confidence": 92,
        "sources": [
          {
            "domain": "github.com",
            "uri": "http://github.com/ciaranlee",
            "extracted_on": "2015-07-29",
            "last_seen_on": "2017-07-01",
            "still_on_page": true
          },
          {
            "domain": "blog.intercom.com",
            "uri": "http://blog.intercom.com/were-hiring-a-support-engineer/",
            "extracted_on": "2015-08-29",
            "last_seen_on": "2017-07-01",
            "still_on_page": true
          },
          ...
        ],
        "first_name": "Ciaran",
        "last_name": "Lee",
        "position": "Support Engineer",
        "position_raw": "Support Engineer",
        "seniority": "senior",
        "department": "it",
        "linkedin": null,
        "twitter": "ciaran_lee",
        "phone_number": null,
        "verification": {
          "date": "2019-12-06",
          "status": "valid"
        }
      },
      ...
    ],
    "linked_domains": []
  },
  "meta": {
    "results": 35,
    "limit": 10,
    "offset": 0,
    "params": {
      "domain": "intercom.com",
      "company": null,
      "type": null,
      "seniority": null,
      "department": null
    }
  }
}

{
  "data": {
    "first_name": "Alexis",
    "last_name": "Ohanian",
    "email": "alexis@reddit.com",
    "score": 97,
    "domain": "reddit.com",
    "accept_all": false,
    "position": "Cofounder",
    "twitter": null,
    "linkedin_url": null,
    "phone_number": null,
    "company": "Reddit",
    "sources": [
      {
        "domain": "redditblog.com",
        "uri": "http://redditblog.com/2008/10/22/widgets-get-an-upgrade-and-a-firefox-extension-that-will-rock-your-world",
        "extracted_on": "2018-10-19",
        "last_seen_on": "2021-05-18",
        "still_on_page": true
      },
      ...
    ],
    "verification": {
      "date": "2021-06-14",
      "status": "valid"
    }
  },
  "meta": {
    "params": {
      "first_name": "Alexis",
      "last_name": "Ohanian",
      "full_name": null,
      "domain": "reddit.com",
      "company": null,
      "max_duration": null
    }
  }
}

{
  "data": {
    "status": "valid",
    "score": 100,
    "email": "patrick@stripe.com",
    "regexp": true,
    "gibberish": false,
    "disposable": false,
    "webmail": false,
    "mx_records": true,
    "smtp_server": true,
    "smtp_check": true,
    "accept_all": false,
    "block": false,
    "sources": [
      {
        "domain": "beta.paganresearch.io",
        "uri": "http://beta.paganresearch.io/details/stripe",
        "extracted_on": "2020-06-17",
        "last_seen_on": "2020-06-17",
        "still_on_page": true
      },
      {
        "domain": "icloudnewz.blogspot.com",
        "uri": "http://icloudnewz.blogspot.com/2017/11/follow-patrick-collison-mike-birbiglia.html",
        "extracted_on": "2020-03-25",
        "last_seen_on": "2020-06-29",
        "still_on_page": true
      }
    ]
  },
  "meta": {
    "params": {
      "email": "patrick@stripe.com"
    }
  }
}

Manage your leads and sequences.

The Leads API lets you control the leads you store in Hunter, including fetching, adding, or deleting leads.

Leads API

The Sequences API allows you to review your sequences and add or remove recipients.

Sequences API

{
  "data": {
    "leads": [
      {
        "id": 1,
        "email": "hoon@stripe.com",
        "first_name": "Jeremy",
        "last_name": "Hoon",
        "position": null,
        "company": "Stripe",
        "company_industry": null,
        "company_size": null,
        "confidence_score": null,
        "website": "stripe.com",
        "country_code": null,
        "source": null,
        "linkedin_url": null,
        "phone_number": null,
        "twitter": null,
        "sync_status": null,
        "notes": null,
        "sending_status": null,
        "last_activity_at": null,
        "last_contacted_at": null,
        "verification": {
          "date": "2021-01-01 12:00:00 UTC",
          "status": "deliverable"
        },
        "leads_list": {
          "id": 1,
          "name": "My leads list",
          "leads_count": 2
        },
        "created_at": "2021-01-01 12:00:00 UTC"
      },
      {
        "id": 2,
        "email": "alexis@reddit.com",
        "first_name": "Alexis",
        "last_name": "Ohanian",
        "position": "Cofounder",
        "company": "Reddit",
        "company_industry": null,
        "company_size": null,
        "confidence_score": 97,
        "website": "reddit.com",
        "country_code": "US",
        "source": null,
        "linkedin_url": null,
        "phone_number": null,
        "twitter": null,
        "sync_status": null,
        "notes": null,
        "sending_status": null,
        "last_activity_at": null,
        "last_contacted_at": null,
        "verification": {
          "date": "2021-01-01 12:00:00 UTC",
          "status": "deliverable"
        },
        "leads_list": {
          "id": 1,
          "name": "My leads list",
          "leads_count": 2
        },
        "created_at": "2021-01-01 12:00:00 UTC"
      }
    }
  },
  "meta": {
    "count": 2,
    "total": 2,
    "params": {
      "limit": 20,
      "offset": 0
    }
  }
}

{
  "data": {
    "recipients": [
      {
        "email": "hoon@stripe.com",
        "first_name": "Jeremy",
        "last_name": "Hoon",
        "position": null,
        "company": "Stripe",
        "website": "stripe.com",
        "sending_status": "pending",
        "lead_id": 1
      },
      {
        "email": "alexis@reddit.com",
        "first_name": "Alexis",
        "last_name": "Ohanian",
        "position": "Cofounder",
        "company": "Reddit",
        "website": "reddit.com",
        "sending_status": "pending",
        "lead_id": 2
      }
    ]
  },
  "meta": {
    "limit": 20,
    "offset": 0
  }
}

Enrich your lead data with 100+ attributes

Turn an email address or a LinkedIn handle into a complete profile with job title, location, social handles, and more.

Lead Enrichment API

Turn a website address into a list of email addresses and details about the company, including location, industry, keywords, technologies, and more.

Company Enrichment API

Turn an email address or a LinkedIn handle into a fully enriched record about the associated company.

Combined Enrichment API

Our API is a one-to-one replacement to Clearbit for enrichment, and offers unmatched data quality.

Clearbit Replacement API

Quickly find any company logo via its domain with Hunter’s logo API. 100% free. No account, just a backlink from your site to hunter.io.

Logo API

{
  "data": {
    "id": "b3ae14fb-6725-56d1-ac68-a76f8ce04dec",
    "name": {
      "fullName": "Matthew Tharp",
      "givenName": "Matthew",
      "familyName": "Tharp"
    },
    "email": "matt@hunter.io",
    "location": "Framingham, Massachusetts, United States",
    "timeZone": "America/New_York",
    "utcOffset": -5,
    "geo": {
      "city": "Framingham",
      "state": "Massachusetts",
      "stateCode": "MA",
      "country": "United States",
      "countryCode": "US",
      "lat": 42.27926,
      "lng": -71.41617
    },
    "bio": null,
    "site": null,
    "avatar": null,
    "employment": {
      "domain": "hunter.io",
      "name": "Hunter",
      "title": "Chief Executive Officer",
      "role": "executive",
      "subRole": null,
      "seniority": "executive"
    },
    "facebook": {
      "handle": null
    },
    "github": {
      "handle": null,
      "id": null,
      "avatar": null,
      "company": null,
      "blog": null,
      "followers": null,
      "following": null
    },
    "twitter": {
      "handle": "matttharp",
      "id": null,
      "bio": null,
      "followers": null,
      "following": null,
      "statuses": null,
      "favorites": null,
      "location": null,
      "site": null,
      "avatar": null
    },
    "linkedin": {
      "handle": "matttharp"
    },
    "googleplus": {
      "handle": null
    },
    "gravatar": {
      "handle": null,
      "urls": [],
      "avatar": null,
      "avatars": []
    },
    "fuzzy": false,
    "emailProvider": "google.com",
    "indexedAt": "2025-01-07",
    "phone": null,
    "activeAt": "2025-01-07",
    "inactiveAt": null
  },
  "meta": {
    "email": "matt@hunter.io"
  }
}

{
  "data": {
    "id": "c60603a0-001c-5ca3-86a2-c571c6d43c25",
    "name": "Stripe",
    "legalName": "Stripe",
    "domain": "stripe.com",
    "domainAliases": [],
    "site": {
      "phoneNumbers": [
        "+1 555 555 5555"
      ],
      "emailAddresses": […]
    },
    "category": {
      "sector": "Information Technology",
      "industryGroup": "Software & Services",
      "industry": "Internet Software & Services",
      "subIndustry": "Internet",
      "gicsCode": "45103010",
      "sicCode": "36",
      "sic4Codes": [
        "73"
      ],
      "naicsCode": "51",
      "naics6Codes": [
        "519130"
      ],
      "naics6Codes2022": [
        "519290"
      ]
    },
    "tags": [
      "payment processing",
      "fintech",
      "online payments",
      "financial technology"
    ],
    "description": "Stripe is a fintech company that specializes in online payment processing services.",
    "foundedYear": 2010,
    "location": "South San Francisco, California, United States",
    "timeZone": "America/Los_Angeles",
    "utcOffset": -8,
    "geo": {
      "streetNumber": null,
      "streetName": null,
      "subPremise": null,
      "streetAddress": null,
      "city": "South San Francisco",
      "postalCode": null,
      "state": "California",
      "stateCode": "CA",
      "country": "United States",
      "countryCode": "US",
      "lat": 37.65466,
      "lng": -122.40775
    },
    "logo": "https://logos.hunter.io/stripe.com",
    "facebook": {
      "handle": "175383762511776",
      "likes": null
    },
    "linkedin": {
      "handle": "company/stripe"
    },
    "twitter": {
      "handle": "stripe",
      "id": null,
      "bio": null,
      "followers": null,
      "following": null,
      "location": null,
      "site": null,
      "avatar": null
    },
    "crunchbase": {
      "handle": null
    },
    "instagram": {
      "handle": null
    },
    "emailProvider": "google.com",
    "type": "private",
    "companyType": "privately held",
    "ticker": null,
    "identifiers": {
      "usEIN": null
    },
    "phone": "+1 555 555 5555",
    "metrics": {
      "alexaUsRank": null,
      "alexaGlobalRank": null,
      "trafficRank": "very_high",
      "employees": "10K-50K",
      "marketCap": null,
      "raised": null,
      "annualRevenue": null,
      "estimatedAnnualRevenue": null,
      "fiscalYearEnd": null
    },
    "indexedAt": "2024-10-16",
    "tech": [
      "adyen",
      "algolia",
      "amazon-s3",
      "amazon-web-services",
      "angular-js",
      "ansible",
      "aws-lambda",
      "babel",
      "backbone-js",
      "bash",
      "bootstrap",
      "c",
      "cassandra",
      "chef",
      "contentful",
      "css",
      "django",
      "dnn",
      "docker",
      "docusign",
      "elasticsearch",
      "elixir",
      "esbuild",
      "excel",
      "facebook",
      "git",
      "go",
      "go-js",
      "google-ads",
      "google-cloud-platform",
      "google-workspace",
      "grafana",
      "graphql",
      "highcharts",
      "hubspot",
      "java",
      "javascript",
      "jenkins",
      "jss",
      "kafka",
      "kotlin",
      "kubernetes",
      "linkedin",
      "marketo",
      "microsoft",
      "microsoft-azure",
      "microsoft-excel",
      "microsoft-office",
      "mindbody",
      "mongodb",
      "mysql",
      "net",
      "netsuite",
      "next-js",
      "nginx",
      "node-js",
      "nosql",
      "objective-c",
      "oracle",
      "paypal",
      "php",
      "plotly",
      "postgresql",
      "prometheus",
      "puppet",
      "puppeteer",
      "pyspark",
      "python",
      "react-js",
      "react-native",
      "redis",
      "render",
      "ruby",
      "rust",
      "salesforce",
      "salesforce-service-cloud",
      "salesloft",
      "sap",
      "scala",
      "sentry",
      "shopify",
      "spark",
      "splunk",
      "spring",
      "sql",
      "squarespace",
      "stripe",
      "temporal",
      "terraform",
      "twitter",
      "typescript",
      "unix",
      "vue-js",
      "websocket",
      "windows",
      "woocommerce",
      "xslt",
      "youtube",
      "zip",
      "zoominfo"
    ],
    "techCategories": [
      "accounting_and_finance",
      "advertising",
      "analytics",
      "appointment_scheduling",
      "authentication_services",
      "cloud_computing_services",
      "content_management_system",
      "crm",
      "data_enrichment_services",
      "data_management",
      "data_processing",
      "data_visualization",
      "database",
      "ecommerce",
      "image_video_services",
      "marketing_automation",
      "monitoring",
      "operating_system",
      "payment",
      "productivity",
      "programming_framework",
      "project_management_software",
      "sales_productivity",
      "site_search",
      "social_sharing",
      "web_hosting",
      "web_servers"
    ],
    "fundingRounds": [],
    "parent": {
      "domain": null
    },
    "ultimateParent": {
      "domain": null
    }
  },
  "meta": {
    "domain": "stripe.com"
  }
}

{
  "data": {
    "person": {
      "id": "c6effe25-565c-5a19-8193-674726000454",
      "name": {
        "fullName": "Sam Altman",
        "givenName": "Sam",
        "familyName": "Altman"
      },
      "email": "sam@openai.com",
      "location": null,
      "timeZone": null,
      "utcOffset": null,
      "geo": {
        "city": null,
        "state": null,
        "stateCode": null,
        "country": null,
        "countryCode": null,
        "lat": null,
        "lng": null
      },
      "bio": null,
      "site": null,
      "avatar": null,
      "employment": {
        "domain": "openai.com",
        "name": "OpenAI",
        "title": null,
        "role": null,
        "subRole": null,
        "seniority": null
      },
      "facebook": {
        "handle": null
      },
      "github": {
        "handle": null,
        "id": null,
        "avatar": null,
        "company": null,
        "blog": null,
        "followers": null,
        "following": null
      },
      "twitter": {
        "handle": "trustinyoon",
        "id": null,
        "bio": null,
        "followers": null,
        "following": null,
        "statuses": null,
        "favorites": null,
        "location": null,
        "site": null,
        "avatar": null
      },
      "linkedin": {
        "handle": null
      },
      "googleplus": {
        "handle": null
      },
      "gravatar": {
        "handle": null,
        "urls": [],
        "avatar": null,
        "avatars": []
      },
      "fuzzy": false,
      "emailProvider": "google.com",
      "indexedAt": "2025-01-10",
      "phone": null,
      "activeAt": "2025-01-15",
      "inactiveAt": null
    },
    "company": {
      "id": "5424e3b0-c75d-55b6-ad21-7a0fbbfcc7ad",
      "name": "OpenAI",
      "legalName": "OpenAI",
      "domain": "openai.com",
      "domainAliases": [],
      "site": {
        "phoneNumbers": [
          "+1 317 693 1781"
        ],
        "emailAddresses": […]
      },
      "category": {
        "sector": "Industrials",
        "industryGroup": "Commercial & Professional Services",
        "industry": "Professional Services",
        "subIndustry": "Research & Consulting Services",
        "gicsCode": "20202020",
        "sicCode": "87",
        "sic4Codes": [
          "87"
        ],
        "naicsCode": "54",
        "naics6Codes": [
          "541713"
        ],
        "naics6Codes2022": [
          "541715"
        ]
      },
      "tags": [
        "artificial intelligence",
        "machine learning",
        "technology",
        "research",
        "innovation"
      ],
      "description": "OpenAI is a technology company that specializes in artificial intelligence research and innovation.",
      "foundedYear": 2015,
      "location": "San Francisco, California, United States",
      "timeZone": "America/Los_Angeles",
      "utcOffset": -8,
      "geo": {
        "streetNumber": null,
        "streetName": null,
        "subPremise": null,
        "streetAddress": null,
        "city": "San Francisco",
        "postalCode": null,
        "state": "California",
        "stateCode": "CA",
        "country": "United States",
        "countryCode": "US",
        "lat": 37.77493,
        "lng": -122.41942
      },
      "logo": "https://logos.hunter.io/openai.com",
      "facebook": {
        "handle": "openai.research",
        "likes": null
      },
      "linkedin": {
        "handle": "company/openai"
      },
      "twitter": {
        "handle": null,
        "id": null,
        "bio": null,
        "followers": null,
        "following": null,
        "location": null,
        "site": null,
        "avatar": null
      },
      "crunchbase": {
        "handle": null
      },
      "instagram": {
        "handle": null
      },
      "emailProvider": "google.com",
      "type": "partnership",
      "companyType": "partnership",
      "ticker": null,
      "identifiers": {
        "usEIN": null
      },
      "phone": "+1 317 693 1781",
      "metrics": {
        "alexaUsRank": null,
        "alexaGlobalRank": null,
        "trafficRank": "very_high",
        "employees": "1K-5K",
        "marketCap": null,
        "raised": null,
        "annualRevenue": null,
        "estimatedAnnualRevenue": null,
        "fiscalYearEnd": null
      },
      "indexedAt": "2024-10-16",
      "tech": [
        "adobe-analytics",
        "adobe-target",
        "amazon-web-services",
        "ansible",
        "auth0",
        "bash",
        "brightcove",
        "c",
        "chef",
        "cloudflare",
        "css",
        "datadog",
        "django",
        "docker",
        "elasticsearch",
        "excel",
        "flask",
        "go",
        "google-analytics",
        "google-cloud-platform",
        "google-workspace",
        "grafana",
        "graphql",
        "hubspot",
        "intercom",
        "java",
        "javascript",
        "jquery",
        "kafka",
        "kaltura",
        "kubernetes",
        "laravel",
        "microsoft-azure",
        "microsoft-excel",
        "mysql",
        "netsuite",
        "next-js",
        "node-js",
        "optimizely",
        "oracle",
        "plotly",
        "postgresql",
        "prometheus",
        "puppet",
        "python",
        "react-js",
        "redis",
        "rust",
        "salesforce",
        "sap",
        "scala",
        "shopify",
        "spark",
        "splunk",
        "sql",
        "stripe",
        "tailwind-css",
        "terraform",
        "typescript",
        "vercel",
        "vimeo",
        "windows",
        "wordpress",
        "youtube",
        "zip"
      ],
      "techCategories": [
        "accounting_and_finance",
        "analytics",
        "authentication_services",
        "cloud_computing_services",
        "content_management_system",
        "conversion_optimization",
        "crm",
        "customer_support",
        "data_processing",
        "data_visualization",
        "database",
        "dns",
        "ecommerce",
        "image_video_services",
        "monitoring",
        "operating_system",
        "payment",
        "productivity",
        "programming_framework",
        "web_hosting"
      ],
      "fundingRounds": [],
      "parent": {
        "domain": null
      },
      "ultimateParent": {
        "domain": null
      }
    }
  },
  "meta": {
    "email": "sam@openai.com"
  }
}

{
  "person": {
    "id": "b3ae14fb-6725-56d1-ac68-a76f8ce04dec",
    "name": {
      "fullName": "Matthew Tharp",
      "givenName": "Matthew",
      "familyName": "Tharp"
    },
    "email": "matt@hunter.io",
    "location": "Framingham, Massachusetts, United States",
    "timeZone": "America/New_York",
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}

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