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 first 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 - [Example request](https://api.nationalize.io?name=peter): `GET https://api.nationalize.io?name=peter` returns `{"count":121222,"name":"peter","country":[{"country_id":"NG","probability":0.078},{"country_id":"KE","probability":0.046},{"country_id":"UG","probability":0.043}, ...]}` - [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): Details on dataset size and country coverage Note: Nationalize.io does not support the `country_id` localization parameter — localization is not applicable because the API's purpose is to predict country of origin. ## Pricing - [Pricing](https://nationalize.io/pricing): All tiers include access to all three APIs (genderize.io, agify.io, nationalize.io). - Free: 2,500 names/month - Bas