Agify.io

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. The free tier allows 2,500 name lookups per month with no credit card required; paid plans scale up to 250,000+ names per month. Requests support batch processing of up to 10 names and optional country scoping via ISO 3166-1 alpha-2 codes. The API is stateless, cookieless, and GDPR compliant — submitted names are discarded immediately and never stored.

Agify.io publishes 1 API on the APIs.io network: Age Prediction API. Tagged areas include Age Prediction, Name Analysis, Demographics, Statistical API, and Free API.

The Agify.io catalog on APIs.io includes 1 Spectral governance ruleset.

Agify.io’s developer surface includes authentication, documentation, pricing, FAQ, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.5/100 developing ▬ flat Agent 35/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumOpen⚡ Free to try

1 APIs

Age PredictionName AnalysisDemographicsStatistical APIFree API

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 39.5/100 · developing

Contract Quality 14.5 / 25

Developer Ergonomics 4.3 / 20

Access Clarity 10.0 / 20

Operational Transparency 2.7 / 13

Contract Governance 1.2 / 12

Discoverability 6.9 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/agify: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Agify.io Age Prediction API

Endpoints for predicting age from first names using statistical data.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Agify Age Prediction API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Agify Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Agify Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Agify Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Agify.io API Rules

4 rules · 3 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

AgePrediction

4 properties

JSON SCHEMA

ErrorResponse

1 properties

JSON SCHEMA

Examples 5

Example request and response payloads for these APIs.

Batch Name Lookup

4 fields

EXAMPLE

Name Not Found

4 fields

EXAMPLE

Rate Limit Exceeded

4 fields

EXAMPLE

Single Name Country Scoped

4 fields

EXAMPLE

Single Name Lookup

4 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Agify Authentication

apiKey · 1 scheme

SECURITY

Agify Domain Security

TLSv1.2 · DNSSEC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Agify Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

Libraries

Libraries

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

FAQ

FAQ

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

DataCoverage

DataCoverage

CaseStudies

CaseStudies

Source (apis.yml)

aid: agify
name: Agify.io
description: 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. The free tier allows 2,500 name lookups per month with no credit
  card required; paid plans scale up to 250,000+ names per month. Requests support batch processing of up to 10 names and
  optional country scoping via ISO 3166-1 alpha-2 codes. The API is stateless, cookieless, and GDPR compliant — submitted
  names are discarded immediately and never stored.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/agify.png
url: https://raw.githubusercontent.com/api-evangelist/agify/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Age Prediction
- Name Analysis
- Demographics
- Statistical API
- Free API
apis:
- aid: agify:agify-age-prediction-api
  name: Agify.io Age Prediction API
  description: Endpoints for predicting age from first names using statistical data.
  humanURL: https://agify.io
  baseURL: https://api.agify.io
  tags:
  - Age Prediction
  properties:
  - type: OpenAPI
    url: openapi/agify-age-prediction-api-openapi.yml
  - type: Documentation
    url: https://agify.io/documentation
common:
- type: AgenticAccess
  url: agentic-access/agify-agentic-access.yml
- type: DomainSecurity
  url: security/agify-domain-security.yml
- type: Authentication
  url: authentication/agify-authentication.yml
- type: Website
  url: https://agify.io
- type: Documentation
  url: https://agify.io/documentation
- type: Pricing
  url: https://agify.io/pricing
- type: Plans
  url: plans/agify-plans-pricing.yml
- type: RateLimits
  url: rate-limits/agify-rate-limits.yml
- type: FinOps
  url: finops/agify-finops.yml
- type: Authentication
  url: https://agify.io/register
- type: FAQ
  url: https://agify.io/faq
- type: Libraries
  url: https://agify.io/libraries
- type: DataCoverage
  url: https://agify.io/our-data
- type: CaseStudies
  url: https://agify.io/case-studies
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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