Agify.io
FreemiumDegradedNot yet verified
Predicts a likely age for a first name from statistics on roughly a billion people.
Example request
curl -s 'https://api.agify.io/?name=michael'
Free tier, in plain English
Works without a key at a small per-IP daily cap; a free account raises that to 2,500 name lookups a month.
Alternatives in Demographics
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