GET info/assembly/{species}

ensembl.org:ensembl-rest-api

Summary: Get assembly information
Operation ID: getAssembly
Auth: none

Retrieve detailed assembly and chromosome information for a specific species. Returns the reference genome build, chromosome names and lengths, and assembly coordinates. This tells you which chromosome identifiers to use when querying regions (e.g., '1' vs 'chr1'). Critical for converting between coordinate systems and understanding the genome structure for your target species.

Original spec description

List the currently available assemblies for a species, along with toplevel sequences, chromosomes and cytogenetic bands.

Usage Tips

- Chromosome names vary by species: human uses '1', '2', 'X', 'Y' while some species use 'Chr1', 'Chr2' - Check the `length` field before making large region queries - some chromosomes are huge - The `coord_system` field tells you what the chromosome identifiers are called in this assembly

Parameters (1)

species (string, path, required)

Species name

Examples (1)

TitleTypeURLAction
Get human genome assembly information probe-gate https://rest.ensembl.org/info/assembly/homo_sapiens?content-type=application/json

No probe data for this endpoint yet.