Nationalize.io

About Nationalize.io

Nationalize.io is an API service that predicts the nationality of a person based on their name. It accepts full names, supports diacritics and non-Latin alphabets, and allows requests to be scoped to specific countries. The service is built for high-volume use, with official client libraries available for integration into applications and workflows.

Beyond the core API, the service offers a spreadsheet tool for uploading datasets and processing nationality (along with gender and age) predictions in bulk, as well as no-code integrations with platforms including n8n, Pipedream, Google Sheets, Airtable, Shopify, and Salesforce. It also supports the Model Context Protocol, allowing it to be connected to AI assistants such as Claude, Cursor, and ChatGPT for demographic queries in plain language.

Nationalize.io is part of a suite that also includes genderize.io (gender classification) and agify.io (age estimation), all built on data collected since 2009 covering more than 1 billion people. It is aimed at use cases such as customer analytics and academic research, where nationality composition of a dataset needs to be estimated. The company is EU-based and states GDPR compliance.

Key features

• Predicts nationality from a full name via API
• Supports diacritics, accents, and non-latin alphabets
• Localization scoping to specific countries
• Spreadsheet upload tool for bulk gender, age, and nationality enrichment
• No-code integrations with Google Sheets, Airtable, Shopify, Salesforce, n8n, and Pipedream
• MCP support for use from AI assistants like Claude and ChatGPT

Frequently asked questions