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Full detail: Where this data comes from
Agify.io is a free REST API that predicts the age of a person based on their first name using statistical data from over one billion records spanning 195+ countries. The service is provided by Demografix ApS and shares a single API key with the companion Genderize.io and Nationalize.io APIs.
# Single name lookup (free, no key required for initial test)
curl "https://api.agify.io?name=michael&apikey=YOUR_API_KEY"
# Response
# {"name":"michael","age":65,"count":298219}
# With country scoping
curl "https://api.agify.io?name=michael&country_id=US&apikey=YOUR_API_KEY"
# Batch lookup (up to 10 names per request)
curl "https://api.agify.io?name[]=alice&name[]=bob&name[]=charlie&apikey=YOUR_API_KEY"- Base URL:
https://api.agify.io - Method: GET
- Authentication: API key via
apikeyquery parameter (obtain at agify.io/register) - Free Tier: 2,500 names/month — no credit card required
| Parameter | Required | Description |
|---|---|---|
name |
Yes | First name to predict age for |
apikey |
Yes | API key from your Agify account |
country_id |
No | ISO 3166-1 alpha-2 country code for localized predictions |
| Field | Type | Description |
|---|---|---|
name |
string | The name as processed by the API |
age |
integer | Predicted age in years (null if insufficient data) |
count |
integer | Number of data records supporting the prediction |
country_id |
string | Returned when country scoping is applied |
| Header | Description |
|---|---|
X-Rate-Limit-Limit |
Total names allowed in the current monthly window |
X-Rate-Limit-Remaining |
Names remaining in the current window |
X-Rate-Limit-Reset |
Seconds until the quota window resets |
| Plan | Monthly Cost | Names/Month |
|---|---|---|
| Free | $0 | 2,500 |
| Standard | $60 | 250,000 |
| Enterprise | Custom | 25,000,000+ |
See plans/agify-plans-pricing.yml for full plan details.
- Website: https://agify.io
- Documentation: https://agify.io/documentation
- API Reference: https://agify.io/documentation/api/reference
- Pricing: https://agify.io/pricing
- FAQ: https://agify.io/faq
- SDKs & Libraries: https://agify.io/libraries
- Data Coverage: https://agify.io/our-data
- Register: https://agify.io/register
Agify.io is part of the Demografix suite. The same API key works across all three:
- Genderize.io — predict gender from a name
- Agify.io — predict age from a name
- Nationalize.io — predict nationality from a name
Demografix ApS Eriksvej 30, 4000 Roskilde, Denmark Email: info@genderize.io
GDPR compliant. Submitted names are discarded immediately and never stored.
This repository is an APIs.json profile maintained by API Evangelist.