Genderize.io
Development
Estimates a gender from a first name
Estimate gender from a first name, with country bias.
Auth
No Auth
HTTPS
Yes
CORS
Yes
API URL
Common Use Cases
- •Integrate developer tools into CI/CD pipelines
- •Build code analysis and documentation platforms
- •Create developer productivity dashboards
Integration Guide
Review the API Documentation
Visit the official Genderize.io documentation to understand available endpoints, request formats, and response structures. Familiarize yourself with the API's rate limits and usage policies before integration.
No Authentication Required
Good news — Genderize.io does not require any authentication. You can start making API requests directly without registering for an API key or setting up OAuth credentials.
Use HTTPS for Secure Requests
Genderize.io supports HTTPS, ensuring encrypted communication. Always use HTTPS endpoints in production to protect data in transit and comply with modern web security standards.
CORS Enabled — Direct Browser Access
Genderize.io has CORS enabled, meaning you can make requests directly from the browser. This is ideal for frontend-only applications built with React, Vue, or vanilla JavaScript.
Implement and Test
Write your API integration code, start with a simple test request to verify connectivity. Implement proper error handling for network failures, rate limits, and invalid responses. Monitor your API usage to stay within any limits.
Code Examples
JavaScript / Fetch API:
// JavaScript example
fetch("https://genderize.io")
.then(response => {
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
return response.json();
})
.then(data => {
console.log("API response:", data);
})
.catch(error => {
console.error("Error fetching from Genderize.io:", error);
});Python / Requests:
# Python example
import requests
response = requests.get("https://genderize.io")
if response.status_code == 200:
data = response.json()
print("API response:", data)
else:
print(f"Error: {response.status_code}")Frequently Asked Questions
Is Genderize.io free to use?
Do I need an API key for Genderize.io?
Can I use Genderize.io in a browser-based application?
What category does Genderize.io belong to?
Is Genderize.io secure?
Editor's Notes & Deep Dive
Key Features
- →GET /?name=alex returns gender plus probability
- →GET /?name=alex&country_id=FR biases prediction by country
- →Batch: GET /?name[]=alex&name[]=kim returns up to 100 in one call
Rate Limits & Quotas
Free tier: 1000 req/day, no key required. Paid plans raise the daily cap.
Known Issues & Pitfalls
- !Gender is binary in the response — the API doesn't model non-binary names
- !Probability below ~0.7 means the name is ambiguous; treat as unknown
- !Some countries return null for most names due to sparse data
How It Compares
Sibling to agify-io. Same team, same free-tier limits, same API shape. Pair them for age + gender.
Sample Response
{
"name": "alex",
"gender": "male",
"probability": 0.87,
"count": 12345
}Pro Tips
- ✓Cache results by name — the underlying distribution barely changes month to month