Genderize.io

Free REST API that predicts the gender of a first name with probability scores based on name statistics from millions of users worldwide. Part of the Demografix suite alongside Agify (age prediction) and Nationalize (nationality prediction), sharing a single API key across all three services.

1 APIs 0 Features

GenderNamesPredictionDemographicsMachine LearningStatistics

APIs

Genderize.io API

REST API that accepts first names and returns gender predictions (male, female, or null) with probability scores and sample counts. Supports single names, batch requests of up t...

Pricing Plans

Genderize Plans Pricing

3 plans

PLANS

Rate Limits

Genderize Rate Limits

4 limits

RATE LIMITS

FinOps

Genderize Finops

FINOPS

Semantic Vocabularies

context Context

2 classes · 6 properties

JSON-LD

Example Payloads

Authenticated Request

3 fields

EXAMPLE

Batch Names Request

3 fields

EXAMPLE

Country Scoped Request

3 fields

EXAMPLE

Single Name Request

3 fields

EXAMPLE

Unknown Gender Response

3 fields

EXAMPLE

Resources

Documentation

Sources

aid: genderize
name: Genderize.io
description: Free REST API that predicts the gender of a first name with probability scores based on name statistics from
  millions of users worldwide. Part of the Demografix suite alongside Agify (age prediction) and Nationalize (nationality
  prediction), sharing a single API key across all three services.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/genderize/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Gender
- Names
- Prediction
- Demographics
- Machine Learning
- Statistics
apis:
- aid: genderize:genderize-api
  name: Genderize.io API
  description: REST API that accepts first names and returns gender predictions (male, female, or null) with probability scores
    and sample counts. Supports single names, batch requests of up to 10 names, and country-scoped lookups using ISO 3166-1
    alpha-2 country codes.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://genderize.io
  baseURL: https://api.genderize.io
  tags:
  - Gender
  - Names
  - Prediction
  - Demographics
  properties:
  - type: Documentation
    url: https://genderize.io/documentation/api/reference
  - type: OpenAPI
    url: https://raw.githubusercontent.com/api-evangelist/genderize/refs/heads/main/openapi/openapi.yml
common:
- type: Website
  url: https://genderize.io
- type: Documentation
  url: https://genderize.io/documentation
- type: Pricing
  url: https://genderize.io/pricing
- type: Plans
  url: plans/genderize-plans-pricing.yml
- type: RateLimits
  url: rate-limits/genderize-rate-limits.yml
- type: FinOps
  url: finops/genderize-finops.yml
- type: Login
  url: https://genderize.io/login
- type: FAQ
  url: https://genderize.io/faq
- type: Blog
  url: https://genderize.io/blog
- type: X
  url: https://x.com/genderizeio
- type: GitHubOrg
  url: https://github.com/genderize
- type: LinkedIn
  url: https://www.linkedin.com/company/demografix
- type: StatusPage
  url: https://status.genderize.io
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com