aid: nationalize
name: Nationalize.io
description: Free REST API that predicts the nationality of a person based on their first name using probabilistic models derived from a dataset of approximately one billion people spanning 250 countries and territories. Accepts single or batched names, handles diacritics and non-Latin alphabets, and returns ranked country probabilities as JSON. The same API key works across all three Demografix services (Genderize, Agify, Nationalize).
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
  - Nationality
  - Name Prediction
  - Demographics
  - Probabilistic Models
  - People
apis:
  - aid: nationalize:nationalize-api
    name: Nationalize.io API
    description: Predicts the nationality of a person based on their name, returning ranked country probabilities drawn from a dataset of approximately one billion people. Supports single name lookups, batched requests of up to 10 names, full name parsing, diacritics, and optional country scoping.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://nationalize.io/documentation
    baseURL: https://api.nationalize.io
    tags:
      - Nationality
      - Name Prediction
      - Demographics
    properties:
      - type: Documentation
        url: https://nationalize.io/documentation
      - type: Pricing
        url: https://nationalize.io/pricing
      - type: OpenAPI
        url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/openapi/nationalize-openapi.json
common:
  - type: Website
    url: https://nationalize.io
  - type: Documentation
    url: https://nationalize.io/documentation
  - type: Pricing
    url: https://nationalize.io/pricing
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/plans/nationalize-plans-pricing.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/rate-limits/nationalize-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/nationalize/refs/heads/main/finops/nationalize-finops.yml
  - type: TermsOfService
    url: https://nationalize.io/legal/terms-and-conditions
  - type: PrivacyPolicy
    url: https://nationalize.io/legal/privacy-policy
  - type: FAQ
    url: https://nationalize.io/faq
  - type: Login
    url: https://nationalize.io/login
  - type: SignUp
    url: https://nationalize.io/register
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com