ITIS
FreeLiveLast verified 24 Sept 2026
US government taxonomic database of scientific and common names, hierarchy and classification for species.
Example request
curl -s 'https://services.itis.gov/?q=tsn:182662&wt=json'
Free tier, in plain English
Fully free and keyless; the Solr endpoint just asks users to be considerate with computationally heavy queries like pivot facets.
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