1
first_name;last_name
2
Silvia;Miller
3
Jonathan;Holmes
4
Sophia;Smith
Gender API
Gender-API is AI powered and helps you to find out whether a first name is more likely be used by males or females.
GET https://gender-api.com/get?name=elizabeth&key=yourkey
{
"name": "elizabeth",
"gender": "female",
"samples": 355,
"accuracy": 100,
"duration": "34ms"
}
GENDER API EXPLAINED
Take a Test Drive
Try it out yourself. Enter a name to see the result.
WE CAN ALSO DETERMINE THE GENDER OF AN EMAIL ADDRESS
david3253@gmail.com
David
male
patricia.clarks@outlook.com
Patricia
female
emily.ny@live.com
Emily
female
liamnoland@yahoo.com
Liam
male
l3slie@gmail.com
Leslie
male
j0anna32@live.com
Joanna
female
GENDER-API VS GENERIC AI
Why specialized gender determination outperforms generic AI models.
Lightning Fast
10x - 90x
Faster response times compared to generic AI
More Comprehensive
+37%
More names in our database
Higher Accuracy
+9% - 34%
Better accuracy in gender determination
The numbers can vary depending on the llm model being used and should be treated as a general point of reference.
API CLIENTS & CODE EXAMPLES
Select your programming language to view installation instructions and code examples
PHP with Composer
Official client library
PHP Legacy
Without Composer
TypeScript
Type-safe client
JavaScript
Node.js & Browser
Python
Data science ready
R
Statistical computing
Java
Enterprise ready
C#
.NET integration
Go / Golang
High performance
Ruby
Elegant syntax
PowerShell
Windows Automation
Rust
Memory safe
PHP with Composer
Our official PHP client library offers a convenient way to integrate the Gender API into your PHP applications using Composer package manager.
First install our library with composer:
composer require gender-api/client<?php
use GenderApi\Client as GenderApiClient;
$client = new GenderApiClient('your-api-key');
// Simple gender lookup
$result = $client->getByFirstName('Elisabeth');
if ($result->genderFound()) {
echo $result->getGender(); // "female"
echo $result->getAccuracy(); // 99
}
// First name with country (e.g., "Andrea" varies by country)
$result = $client->getByFirstNameAndCountry('Andrea', 'IT');
echo $result->getGender(); // "male" (in Italy)
// Full name with automatic first/last name splitting
$result = $client->getByFirstNameAndLastName('Sandra Miller');
echo $result->getFirstName(); // "Sandra"
echo $result->getLastName(); // "Miller"
echo $result->getGender(); // "female"
// Email address analysis
$result = $client->getByEmailAddress('elisabeth.smith@company.com');
echo $result->getGender(); // "female"
// Batch processing - multiple names in one call
$names = ['Michael', 'Sarah', 'Kim'];
$results = $client->getByMultipleNames($names);
foreach ($results as $result) {
printf(
"%s: %s (%d%% confidence)\n",
$result->getFirstName(),
$result->getGender(),
$result->getAccuracy()
);
}
See full client documentation here:
PHP Legacy
Standalone PHP implementation without Composer dependency for legacy projects or simple integrations.
function getGender($firstname) {
$myKey = 'insert your server key here';
$data = json_decode(file_get_contents(
'https://gender-api.com/get?key=' .
$myKey .
'&name=' . urlencode($firstname)));
return $data->gender;
}
echo getGender('markus'); //Output: male
TypeScript
Type-safe client for TypeScript projects with full IntelliSense support and strict type checking.
First install our library with npm:
npm install gender-api.com-client --saveimport { Client } from 'gender-api.com-client';
const client = new Client('your-api-key');
// Simple gender lookup
const result = await client.getByFirstName('Theresa');
console.log(`${result.first_name} is ${result.gender} (Probability: ${result.probability}`);
// First name with country (e.g., "Andrea" varies by country)
const resultWithCountry = await client.getByFirstName('Andrea', { country: 'IT' });
console.log(`${resultWithCountry.first_name} in Italy is ${resultWithCountry.gender}`);
// Full name with automatic first/last name splitting
const fullResult = await client.getByFullName('John Smith');
console.log(`${fullResult.first_name} ${fullResult.last_name} is ${fullResult.gender}`);
// Email address analysis
const emailResult = await client.getByEmailAddress('marie.curie@example.com');
console.log(`Email gender: ${emailResult.gender}`);
// Batch processing - multiple names in one call
const names = [
{ id: '1', first_name: 'Theresa', country: 'US' },
{ id: '2', first_name: 'John', country: 'US' }
];
const batchResults = await client.getByFirstNameMultiple(names);
batchResults.forEach(r => {
console.log(`ID: ${r.input.id}, Gender: ${r.gender}`);
});
// Account statistics
const stats = await client.getStatistics();
console.log(`Credits Remaining: ${stats.remaining_credits}`);
See full client documentation here:
JavaScript
Easy-to-use JavaScript client for Node.js and browser environments with Promise-based API.
First install our library with npm:
npm install gender-api.com-client --saveconst { Client } = require('gender-api.com-client');
const client = new Client('your-api-key');
// Simple gender lookup
client.getByFirstName('Theresa').then(result => {
console.log(`${result.first_name} is ${result.gender} (Probability: ${result.probability}`);
}).catch(error => {
console.error('Error:', error);
});
// First name with country (e.g., "Andrea" varies by country)
client.getByFirstName('Andrea', { country: 'IT' }).then(result => {
console.log(`${result.first_name} in Italy is ${result.gender}`);
}).catch(error => {
console.error('Error:', error);
});
// Full name with automatic first/last name splitting
client.getByFullName('John Smith').then(result => {
console.log(`${result.first_name} ${result.last_name} is ${result.gender}`);
}).catch(error => {
console.error('Error:', error);
});
// Email address analysis
client.getByEmailAddress('marie.curie@example.com').then(result => {
console.log(`Email gender: ${result.gender}`);
}).catch(error => {
console.error('Error:', error);
});
// Batch processing - multiple names in one call
const names = [
{ id: '1', first_name: 'Theresa', country: 'US' },
{ id: '2', first_name: 'John', country: 'US' }
];
client.getByFirstNameMultiple(names).then(results => {
results.forEach(r => {
console.log(`ID: ${r.input.id}, Gender: ${r.gender}`);
});
}).catch(error => {
console.error('Error:', error);
});
// Account statistics
client.getStatistics().then(stats => {
console.log(`Credits Remaining: ${stats.remaining_credits}`);
}).catch(error => {
console.error('Error:', error);
});
See full client documentation here:
Python
Pythonic API client with clean, readable code perfect for data science, machine learning, and web applications.
First install our library with pip:
# Install: pip install gender-api-client
from gender_api import Client
client = Client(api_key="insert your server key here")
# Simple gender lookup
result = client.get_by_first_name("kevin")
if result.result_found:
print(f"Gender: {result.gender}") #Gender: male
print(f"Accuracy: {result.accuracy}%") #Accuracy: 99%
Python Simple (Without Client Library):
Python 3.*
import json
from urllib.request import urlopen
myKey = "insert your server key here"
url = "https://gender-api.com/get?key=" + myKey + "&name=kevin"
response = urlopen(url)
decoded = response.read().decode('utf-8')
data = json.loads(decoded)
print( "Gender: " + data["gender"]); #Gender: maleSee full client documentation here:
https://github.com/markus-perl/gender-api-client-python
https://pypi.org/project/gender-api-client/
R
Perfect for statistical analysis and data science workflows in R with seamless integration.
install.packages(c("httr2", "dplyr", "tibble", "jsonlite"))#' Gender API Client (single name only)
#'
#' Gets gender by a first name, optionally filtered by country.
#'
#' @param name A character string containing a single first name.
#' @param country Optional two-letter country code, see: https://gender-api.com/en/api-docs
#' @param api_key Your Gender-API.com API key.
#'
#' @return A tibble containing the estimated gender, number of samples,
#' accuracy (0–100), and the request duration in ms.
#' @export
#'
#' @examples
#' \dontrun{
#' gender("Andrea", country="US", api_key="YOUR_KEY")
#' gender("Andrea", country="IT")
#' }
#'
library(httr2)
library(dplyr)
gender <- function(name, country = NULL, api_key = Sys.getenv("GENDER_API_KEY")) {
if (missing(name) || length(name) != 1) {
stop("`name` must be a single string.")
}
if (is.null(api_key) || api_key == "") {
stop("API key is required. Set with `Sys.setenv(GENDER_API_KEY='your_key')` or pass via `api_key`.")
}
args <- list(
key = api_key,
name = name
)
if (!is.null(country)) args$country <- country
resp <- request("https://gender-api.com/get") %>%
req_url_query(!!!args) %>%
req_perform()
if (resp_status(resp) >= 400) {
stop("Request failed: ", resp_status_desc(resp))
}
out <- resp_body_json(resp, simplifyVector = TRUE)
tibble::as_tibble(out)
}
gender("Andrea", country="US", api_key="<YOUR API KEY>")Java
Enterprise-ready Java implementation for robust, scalable applications with proper error handling.
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.io.IOException;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
public class Main {
public static void main(String[] args) {
String apiKey = "YOUR_API_KEY";
String url = "https://gender-api.com/v2/gender/by-first-name";
String payload = "{\"first_name\":\"Theresa\"}";
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(url))
.header("Content-Type", "application/json")
.header("Authorization", "Bearer " + apiKey)
.POST(HttpRequest.BodyPublishers.ofString(payload))
.build();
try {
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
Gson gson = new Gson();
JsonObject json = gson.fromJson(response.body(), JsonObject.class);
System.out.println("Gender: " + json.get("gender").getAsString());
System.out.println("Probability: " + json.get("probability").getAsFloat());
} catch (IOException | InterruptedException e) {
e.printStackTrace();
}
}
}.NET integration for C# applications with full async/await support and modern C# features.
using System;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;
public record GenderResponse(
[property: JsonPropertyName("first_name")] string FirstName,
[property: JsonPropertyName("gender")] string Gender,
[property: JsonPropertyName("probability")] double Probability
);
public class Program
{
public static async Task Main()
{
var apiKey = "YOUR_API_KEY"; // Get your key at https://gender-api.com/en/account/auth-tokens
using var client = new HttpClient();
var requestBody = new { first_name = "Theresa" };
var jsonContent = new StringContent(
JsonSerializer.Serialize(requestBody),
Encoding.UTF8,
"application/json");
// Add Authorization header
client.DefaultRequestHeaders.Add("Authorization", $"Bearer {apiKey}");
try
{
// Send POST request to API V2
var response = await client.PostAsync("https://gender-api.com/v2/gender/by-first-name", jsonContent);
response.EnsureSuccessStatusCode();
// Parse response
var jsonResponse = await response.Content.ReadAsStringAsync();
var result = JsonSerializer.Deserialize<GenderResponse>(jsonResponse);
Console.WriteLine($"Gender: {result.Gender}");
Console.WriteLine($"Probability: {result.Probability}");
}
catch (Exception ex)
{
Console.WriteLine($"Error: {ex.Message}");
}
}
}Go
High-performance Go client using standard libraries for seamless integration.
package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
// Response defines the structure of the JSON response from Gender-API.com
type Response struct {
ResultFound bool `json:"result_found"`
FirstName string `json:"first_name"`
Gender string `json:"gender"`
Probability float64 `json:"probability"`
}
func main() {
// Determine the gender of a first name using API V2
// ---------------------------------------------------
apiKey := "YOUR_API_KEY" // Get your key at https://gender-api.com/en/account/auth-tokens
firstName := "Theresa"
// Construct the JSON payload
requestBody, _ := json.Marshal(map[string]string{
"first_name": firstName,
})
// Create the request
req, err := http.NewRequest("POST", "https://gender-api.com/v2/gender/by-first-name", bytes.NewBuffer(requestBody))
if err != nil {
fmt.Printf("Error creating request: %s\n", err)
return
}
// Set headers
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", "Bearer "+apiKey)
// Perform the request
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
fmt.Printf("Error making request: %s\n", err)
return
}
defer resp.Body.Close()
// Read the response body
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Printf("Error reading response: %s\n", err)
return
}
// Parse the JSON response
var result Response
if err := json.Unmarshal(body, &result); err != nil {
fmt.Printf("Error parsing JSON: %s\n", err)
return
}
// Output the result
fmt.Printf("Name: %s\n", result.FirstName)
fmt.Printf("Gender: %s\n", result.Gender)
fmt.Printf("Probability: %.2f\n", result.Probability)
}Ruby
Simple and elegant Ruby client for easy API integration.
require 'net/http'
require 'json'
require 'uri'
# Determine the gender of a first name using API V2
# ---------------------------------------------------
api_key = 'YOUR_API_KEY' # Get your key at https://gender-api.com/en/account/auth-tokens
uri = URI('https://gender-api.com/v2/gender/by-first-name')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['Authorization'] = "Bearer #{api_key}"
request.body = JSON.dump({ first_name: 'Theresa' })
begin
response = http.request(request)
# Parse the JSON response
result = JSON.parse(response.read_body)
puts "Gender: #{result['gender']}"
puts "Probability: #{result['probability']}"
rescue StandardError => e
puts "Error: #{e.message}"
end
PowerShell
Automate your Windows workflows with our direct PowerShell integration.
# Determine the gender of a first name using API V2
# ---------------------------------------------------
$apiKey = "YOUR_API_KEY" # Get your key at https://gender-api.com/en/account/auth-tokens
$url = "https://gender-api.com/v2/gender/by-first-name"
$body = @{
first_name = "Theresa"
} | ConvertTo-Json
$headers = @{
"Content-Type" = "application/json"
"Authorization" = "Bearer $apiKey"
}
try {
$response = Invoke-RestMethod -Uri $url -Method Post -Headers $headers -Body $body
Write-Host "Name: $($response.first_name)"
Write-Host "Gender: $($response.gender)"
Write-Host "Probability: $($response.probability)"
}
catch {
Write-Host "Error: $_"
}
Rust
Blazingly fast and memory-efficient client for high-performance applications.
use reqwest::header::AUTHORIZATION;
use serde::{Deserialize, Serialize};
use std::error::Error;
// Add to Cargo.toml:
// [dependencies]
// reqwest = { version = "0.11", features = ["json"] }
// tokio = { version = "1", features = ["full"] }
// serde = { version = "1.0", features = ["derive"] }
#[derive(Serialize)]
struct Request<'a> {
first_name: &'a str,
}
#[derive(Deserialize, Debug)]
struct Response {
gender: String,
probability: f64,
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
let api_key = "YOUR_API_KEY"; // Get your key at https://gender-api.com/en/account/auth-tokens
let client = reqwest::Client::new();
let resp: Response = client
.post("https://gender-api.com/v2/gender/by-first-name")
.header(AUTHORIZATION, format!("Bearer {api_key}"))
.json(&Request { first_name: "Theresa" })
.send()
await?
.json()
await?;
println!("Gender: {}", resp.gender);
println!("Probability: {}", resp.probability);
Ok(())
}
TRUSTED INTEGRATIONS
Gender-API works seamlessly with the tools you already use. Explore our growing ecosystem of integrations.
Google Sheets
Microsoft Excel
Zapier
HubSpot
Salesforce
Mailchimp
Klaviyo
Shopify
Gmail
Postman
Cleverreach
OttoKit
Optimizely
OnOffice
RapidAPI
APILayer
saasmetrix
LibreOffice
Numbers
InvoiceBerry
Stripe
Google Sheets
Microsoft Excel
Zapier
HubSpot
Salesforce
Mailchimp
Klaviyo
Shopify
Gmail
Postman
Cleverreach
OttoKit
Optimizely
OnOffice
RapidAPI
APILayer
saasmetrix
LibreOffice
Numbers
InvoiceBerry
Stripe
And many more integrations available!
View All IntegrationsCSV AND EXCEL FILE UPLOAD
Upload CSV files with up to 10,000,000 datasets or Excel files with up to 100,000 datasets per file.
input.csv
output.csv
1
firstname;lastname;ga_gender;ga_accuracy
2
Silvia;Miller;female;99
3
Jonathan;Holmes;male;100
4
Sophia;Smith;female;9
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