export_sequences

Bulk export of RNA sequences matching a query. Unlike query_rnacentral, which returns a handful of enriched hits for a human reader, this tool streams the full result set through the RNAcentral export microservice and returns it in a format suitable for downstream processing — FASTA for bioinformatics tools, Parquet for ML pipelines.

Arguments

Name	Type	Required	Description
query	str	yes	Free-text search term.
rna_type	str	no	Restrict to an RNA type (e.g. "miRNA", "lncRNA").
taxon	str	no	Scientific name (preferred) or NCBI Taxonomy ID.
expert_db	str	no	Source database filter.
has_secondary_structure	bool	no	Only include RNAs with a known 2D structure.
min_length	int	no	Minimum sequence length in nucleotides.
max_length	int	no	Maximum sequence length in nucleotides.
format	str	no	"fasta" (default) or "parquet".

Returns

For fasta, a string of FASTA records. For parquet, a path (or URL) to the generated file returned by the export service.

Notes

• The export service handles pagination internally; there is no client-side limit. Narrow the query with the filter arguments if you don’t want every match.

• Long-running exports may take tens of seconds for large result sets.