Agify.io API
Overview
Agify.io is a free API that predicts the likely age of a person based solely on their first name, using a database of over 350 million historical records. You can query a single name or batch up to 10 names in one request, and optionally filter predictions by country code for improved regional accuracy. It is widely used for demographics research, marketing personalization, and fun side projects.
Beginner Tip
No API key or account is needed — just send a GET request with a name parameter and you will receive a prediction instantly. The free tier allows 1,000 requests per day per IP address; if you need more, register for an API key to raise that limit.
Measurement Record
What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.
- Request
- GET https://api.agify.io?name=michael
- Result
- HTTP 200 · application/json · 42 bytes · compressed
- Response time
- 315 ms (median of 3) · fastest 302 ms
- Transport
- TLSv1.2 · ECDHE-RSA-AES128-GCM-SHA256 · certificate issued by Let's Encrypt
- Browser CORS
- Allowed — Access-Control-Allow-Origin: *
- Rate limit
- 25 per window
- Served by
- nginx/1.16.1
- Recorded
- 2026-08-10
Fields Returned
Top-level fields present in the response we captured, with the type and value we actually received.
| Field | Type | Value received |
|---|---|---|
| count | integer | 311558 |
| name | string | michael |
| age | integer | 57 |
Captured Response
Captured from a real request to https://api.agify.io?name=michael on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.
{
"count": 311558,
"name": "michael",
"age": 57
} Field Reference
name The name that was submitted for age prediction. age Predicted median age for people with this name, or null if data is insufficient. count Total number of records in the database matching this name. Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://api.agify.io?name=michael";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
How This API Fails
We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.
Returned an HTML error page rather than JSON — worth knowing if your client assumes every response can be parsed as JSON.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Measured Score Breakdown
Live HTTP request to the API endpoint
Fully tested on Aug 10, 2026
Technical Specifications
Related Tags
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