Agify.io is a simple REST API that predicts the age of a person based on their first name. Using a large dataset of name-age associations, it returns an estimated age along with a count of how many data points were used and the name's country-localized variant when a country code is provided. Supports batch requests for up to 10 names per call. Used for demographics research, content personalization, and marketing segmentation.
URL: https://agify.io/
Run: Capabilities Using Naftiko
- Age Prediction, Name Analysis, Demographics, REST API
- Created: 2025-01-07
- Modified: 2026-04-19
Predict the age of a person based on their first name. Returns an estimated age, data count used for the prediction, and optionally a country-localized estimate.
Human URL: https://agify.io/documentation
- Age Prediction, Name, Demographics
| Name | Description |
|---|---|
| Name-Based Age Prediction | Estimates a person's age from their first name using a large statistical dataset of name-age associations. |
| Country Localization | Accepts an optional ISO 3166-1 country code to return country-specific age predictions for the given name. |
| Batch Processing | Supports up to 10 names per API request using array parameter syntax for efficient bulk predictions. |
| Rate Limit Headers | Returns X-Rate-Limit-Limit, X-Rate-Limit-Remaining, and X-Rate-Limit-Reset headers to track API usage and quota. |
| Free Tier | Free access for up to 100 requests per day without an API key, making it easy to evaluate the service. |
| Name | Description |
|---|---|
| Demographics Research | Analyze name datasets to estimate age distributions across a user base for research and analytics. |
| Content Personalization | Tailor content or product recommendations based on estimated age derived from a user's provided first name. |
| Marketing Segmentation | Segment leads and customers by estimated age group for targeted marketing campaigns without requiring date-of-birth collection. |
| Form Pre-Fill Assistance | Provide age-range hints during user registration to improve form completion rates and data accuracy. |
| Name | Description |
|---|---|
| Genderize.io | Sibling API that predicts gender based on first name — commonly used alongside Agify for demographic profiling. |
| Nationalize.io | Sibling API that predicts nationality from first name, completing a demographic analysis trifecta with Agify and Genderize. |
Machine-readable API specifications organized by format.
- Agify.io Vocabulary — Taxonomy mapping 1 resource, 1 action, 1 workflow, and 1 persona for age prediction from names
FN: Kin Lane
Email: kin@apievangelist.com