Predict Nationality From a Name - Accurate Nationality Inference API

# Nationalize.io > Nationalize.io is a REST API that predicts the nationality of a person from their name, returning an array of countries with probability scores. It is operated by Demografix ApS (Denmark) and is part of a suite of three name-based demographic APIs. Nationalize.io bases its predictions on a dataset of over 908 million data rows covering 240+ countries and territories. The API is used for demographic analysis, localization, market research, and academic research. Important: Nationalize.io predicts nationality (country of origin), not ethnicity. The API returns ISO 3166-1 alpha-2 country codes (e.g., "US", "GB", "DK") with probability scores. It returns multiple possible countries ranked by likelihood, not a single definitive answer. ## Documentation - [Documentation Hub](https://nationalize.io/documentation): Overview of all integration surfaces — API, MCP server, spreadsheet tool, and no-code workflows ## API - [API Reference](https://nationalize.io/documentation/api/reference): Full API reference with request/response formats, parameters, error codes, and examples - [Name handling](https://nationalize.io/documentation#name-handling): Send a last name or a full name; full names give the most accurate predictions because the given name adds signal to the surname. Name parts are identified by evidence, not position, and titles, initials, and accents are handled. - [Example request](https://api.nationalize.io?name=nguyen): `GET https://api.nationalize.io?name=nguyen` returns `{"count":100783,"name":"nguyen","country":[{"country_id":"VN","probability":0.891132},{"country_id":"MO","probability":0.019031},{"country_id":"US","probability":0.010936}, ...]}` - [Batch requests](https://nationalize.io/documentation): Up to 10 names per request using `name[]=` parameter. Each name counts as one lookup against your quota. - [Our Data](https://nationalize.io/our-data): Open accuracy benchmarks — the live Nationalize API scored against public datasets