No authentication required
Only estimates age from first names
Start by making REST requests to the API without authentication. Use the provided website for documentation and examples.
Uptime · 30-day window
About this API
Agify.io is a simple API that estimates a person's age based solely on their first name. It is useful for developers who want to add demographic insights or age predictions to their applications without requiring complex data inputs.
The API does not require authentication, making it easy to integrate quickly. It is relevant for use cases such as user profiling, marketing analysis, or any scenario where an approximate age guess from a name can add value.
While the API provides a straightforward service, its accuracy depends on the underlying name data and may vary across different cultures or uncommon names. It is best used as a supplementary tool rather than a definitive age source.
What you can build
- 1Display estimated age from user first name
- 2Generate demographic insights based on names
- 3Validate user age guesses in forms
Strengths & limitations
Strengths
- No authentication required
- Simple and focused functionality
- Quick age estimation from names
Limitations
- Only estimates age from first names
- Accuracy depends on name data coverage
Getting started
Start by making REST requests to the API without authentication. Use the provided website for documentation and examples.
FAQ
Do I need an API key to use Agify.io?+
No, Agify.io does not require any authentication or API key.
What kind of data does Agify.io return?+
It returns an estimated age based on the provided first name.
Can I use Agify.io from a browser?+
Yes, since it uses REST and requires no authentication, it can be called directly from browsers.
Is HTTPS required to use the API?+
While not explicitly stated, using HTTPS is recommended for security.
Technical details
- Auth type
- none
- Pricing
- free
- Protocols
- REST
- Response time
- 462 ms
- Last health check
- 6/30/2026, 6:24:26 AM