Hunter.io Email Finder API

api.hunter.io · Company

Company API Key Free Tier Email Lead Generation Marketing

Find professional email addresses — domain search returns all emails for a company, email finder guesses addresses from name + domain, email verifier checks deliverability. Free: 25 requests/month.

Authentication

API Key Free API key at hunter.io. Pass as ?api_key= query parameter.

Sample Requests

GET Domain search

Find email addresses associated with github.com.

https://api.hunter.io/v2/domain-search?limit=5&domain=github.com&api_key=YOUR_KEY

Hover any highlighted part to learn what it does

curl -X GET "https://api.hunter.io/v2/domain-search?limit=5&domain=github.com&api_key=YOUR_KEY"

import requests
params = {
    "limit": "5",
    "domain": "github.com",
    "api_key": "YOUR_KEY"
}
response = requests.get(
    "https://api.hunter.io/v2/domain-search",
    params=params,
)
print(response.json())

const url = new URL('https://api.hunter.io/v2/domain-search');
url.searchParams.set('limit', '5');
url.searchParams.set('domain', 'github.com');
url.searchParams.set('api_key', 'YOUR_KEY');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.hunter.io/v2/domain-search")
	q := baseURL.Query()
	q.Set("limit", "5")
	q.Set("domain", "github.com")
	q.Set("api_key", "YOUR_KEY")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.hunter.io/v2/domain-search")
uri.query = URI.encode_www_form({
  "limit" => "5",
  "domain" => "github.com",
  "api_key" => "YOUR_KEY"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.hunter.io/v2/domain-search?" . http_build_query([
    "limit" => "5",
    "domain" => "github.com",
    "api_key" => "YOUR_KEY"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Email verifier

Verify if an email address is deliverable.

https://api.hunter.io/v2/email-verifier?email=[email protected]&api_key=YOUR_KEY

Hover any highlighted part to learn what it does

curl -X GET "https://api.hunter.io/v2/email-verifier?email=support%40github.com&api_key=YOUR_KEY"

import requests
params = {
    "email": "[email protected]",
    "api_key": "YOUR_KEY"
}
response = requests.get(
    "https://api.hunter.io/v2/email-verifier",
    params=params,
)
print(response.json())

const url = new URL('https://api.hunter.io/v2/email-verifier');
url.searchParams.set('email', '[email protected]');
url.searchParams.set('api_key', 'YOUR_KEY');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.hunter.io/v2/email-verifier")
	q := baseURL.Query()
	q.Set("email", "[email protected]")
	q.Set("api_key", "YOUR_KEY")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.hunter.io/v2/email-verifier")
uri.query = URI.encode_www_form({
  "email" => "[email protected]",
  "api_key" => "YOUR_KEY"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.hunter.io/v2/email-verifier?" . http_build_query([
    "email" => "[email protected]",
    "api_key" => "YOUR_KEY"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Get a free API key at hunter.io (25 req/month)
Pass api_key=YOUR_KEY on every request
Domain search: GET /domain-search?domain=stripe.com&api_key=KEY
Email finder: GET /email-finder?domain=stripe.com&first_name=Patrick&last_name=Collison&api_key=KEY
Verifier: GET /[email protected]&api_key=KEY

Open documentation ↗