aid: agify-io
name: Agify.io
description: 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://raw.githubusercontent.com/api-evangelist/agify-io/refs/heads/main/apis.yml
humanURL: https://agify.io/
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
access: 3rd-Party
tags:
- Age Prediction
- Name Analysis
- Demographics
- REST API
created: '2025-01-07'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: agify-io:predict-age-api
  name: Agify.io Predict Age API
  description: 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. Supports single name and batch requests of up to 10 names.
  humanURL: https://agify.io/documentation
  baseURL: https://api.agify.io
  tags:
  - Age Prediction
  - Name
  - Demographics
  properties:
  - type: Documentation
    url: https://agify.io/documentation
  - type: Pricing
    url: https://agify.io/#pricing
  - type: NaftikoCapability
    url: capabilities/agify-io-age-prediction.yaml
common:
- type: Portal
  url: https://agify.io/
- type: Documentation
  url: https://agify.io/documentation
- type: Pricing
  url: https://agify.io/#pricing
- type: Features
  data:
  - name: Name-Based Age Prediction
    description: Estimates a person's age from their first name using a large statistical dataset of name-age associations.
  - name: Country Localization
    description: Accepts an optional ISO 3166-1 country code to return country-specific age predictions for the given name.
  - name: Batch Processing
    description: Supports up to 10 names per API request using array parameter syntax for efficient bulk predictions.
  - name: Rate Limit Headers
    description: Returns X-Rate-Limit-Limit, X-Rate-Limit-Remaining, and X-Rate-Limit-Reset headers to track API usage and
      quota.
  - name: Free Tier
    description: Free access for up to 100 requests per day without an API key, making it easy to evaluate the service.
- type: UseCases
  data:
  - name: Demographics Research
    description: Analyze name datasets to estimate age distributions across a user base for research and analytics purposes.
  - name: Content Personalization
    description: Tailor content or product recommendations based on estimated age derived from a user's provided first name.
  - name: Marketing Segmentation
    description: Segment leads and customers by estimated age group for targeted marketing campaigns without requiring date-of-birth
      collection.
  - name: Form Pre-Fill Assistance
    description: Provide age-range hints during user registration to improve form completion rates and data accuracy.
- type: Integrations
  data:
  - name: Genderize.io
    description: Sibling API that predicts gender based on first name — commonly used alongside Agify for demographic profiling.
  - name: Nationalize.io
    description: Sibling API that predicts nationality from first name, completing a demographic analysis trifecta with Agify
      and Genderize.
- type: RateLimits
  data:
  - name: Free
    description: 100 requests per day, no API key required
  - name: Basic
    description: 25,000 requests per month for $20
  - name: Standard
    description: 250,000 requests per month for $60
  - name: Plus
    description: 2,500,000 requests per month for $180
  - name: Premium
    description: 25,000,000 requests per month for $540
- type: LLMsTxt
  url: https://agify.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com