Ensembl REST API
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Genes, transcripts, variants, sequences and cross-species homology for human and other vertebrate genomes.
Example request
curl -s 'https://rest.ensembl.org/lookup/symbol/homo_sapiens/BRCA2?content-type=application/json'
Free tier, in plain English
Free and keyless, allowing an average of 15 requests a second; headers report the remaining quota.
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