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Nationalize.io

api.nationalize.io

Predicts the likely nationalities of a first name: up to five country codes with probabilities and the sample count.

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Runs on your machine under the source's own terms

The crw MCP on your computer calls Nationalize.io directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

Ask with this source

A prompt for your agent that names this source and how to call it through the crw MCP.

  • Predict nationality from a name

    Use Nationalize.io (nationalize) from fastCRW Pergamon, capability "Predict nationality from a name" (predict). You have a first name and want the countries it is most associated with. Example options: name=nathaniel. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "nationalize" and capability "predict". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>