Ensembl Scraper: Gene Records by Symbol
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Ensembl Scraper: Gene Records by Symbol
Look up gene records by symbol and species via the Ensembl REST API: coordinates, biotype, strand and assembly. No login, no proxy, no browser.
Pricing
Pay per usage
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Developer
Naimur Hasan
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20 days ago
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Ensembl Scraper
Looks up gene records by symbol and species through the Ensembl REST API. No login, no proxy, no browser.
Input
| Field | Type | Notes |
|---|---|---|
species | string | Ensembl species name, e.g. homo_sapiens, mus_musculus. Default homo_sapiens. |
symbols | array | Required. Gene symbols. Default ["BRCA2", "TP53", "EGFR"]. |
Output
One row per gene: symbol, requestedSymbol, ensemblId, species,
biotype, description, chromosome, start, end, lengthBp,
strand, strandLabel, assembly, objectType, ensemblUrl.
Notes
strandis1or-1, not a boolean or a sign character. It says which DNA strand the gene is read from; the readable label is derived rather than leaving a bare number in the column.- Genomic coordinates are inclusive at both ends, so length is
end - start + 1. Subtracting alone is off by one. assemblymatters when comparing coordinates — the same gene has different positions on GRCh37 and GRCh38.- An unknown symbol returns HTTP 400, not 404; both are treated as "not found" and skipped rather than failing the batch.
- Ensembl emits intermittent HTTP 500s — measured at roughly one call in four, with successful calls interleaved, so the service is up rather than down. Retryable statuses are retried with a backoff; a genuine 400/404 for an unknown symbol is not retried.
