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Predicts the likely gender of a first name from a database of 100M+ names across 200+ countries. Best for enriching contact records, personalizing outreach, or inferring demographics when only a name is known. Returns a gender label with a probability score, optionally scoped by country for higher accuracy. A Demografix API, sibling to Agify (age) and Nationalize (nationality). 1 endpoint available through Lava’s AI Gateway. See the Genderize API docs for full documentation.
Supports both managed (Lava’s API keys) and unmanaged (bring your own credentials) mode.

Endpoints

Predict the likely gender of a first name, optionally localized with country_id. Accepts a single name or a batch of up to 10 via repeated name query parameters. Billed per name.

GET https://api.genderize.io?name=peter — $0.0008 / request

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