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Genderize.io

api.genderize.io

Predicts gender from a first name, with the probability of the prediction and the number of samples behind it, optionally restricted to a country.

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Runs on your machine under the source's own terms

The crw MCP on your computer calls Genderize.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 gender from a name

    Use Genderize.io (genderize) from fastCRW Pergamon, capability "Predict gender from a name" (predict). You have a first name and want a statistical gender estimate. Example options: name=luc, country_id=US. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "genderize" 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>