io.github.cyanheads/ensembl-mcp-server

io.github.cyanheads/ensembl-mcp-server · v0.6.0 · data-and-databases

io.github.cyanheads/ensembl-mcp-server is healthy: it completed an MCP handshake in 2435 ms and exposes 7 tools.

Look up genes, sequences, variants, homologs, and cross-database xrefs from Ensembl REST.

Endpoint: https://ensembl.caseyjhand.com/mcp (streamable-http)

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Facts

Users (last 30 days)0
HandshakeHealthy
Auth neededNone
Tool count7
Latency2435 ms
Last checked (UTC)2026-10-15T03:20:55.247Z

Health history

Checked (UTC)StatusLatencyError
2026-10-15T03:20:55.247ZHealthy2435

Tools (7)

ensembl_list_speciesList species supported by Ensembl with display name, common name, assembly, taxon ID, and division. Required discovery step — species names like homo_sapiens are opaque to non-biologists and are the input format every other Ensembl tool expects. Use nameContains to find a species by partial name mat
ensembl_lookup_geneResolve a gene by symbol + species (or by stable ID) to its Ensembl ID, genomic location (chr:start-end:strand), biotype, description, and transcript list. Entry point for most workflows — the stable ID and coordinates returned here are inputs to other tools. Accepts both symbol lookup (BRCA2 + homo
ensembl_get_sequenceFetch the DNA, cDNA, CDS, or protein sequence for a gene, transcript, protein, or genomic region. Returns a window of the sequence — the first 10,000 characters by default — with its stable ID, molecule type, and full length. When more follows the window, truncated is true and nextOffset is the offs
ensembl_query_regionFind genomic features overlapping a chromosomal region: genes, transcripts, variants, regulatory elements, or exons. Returns each feature with its stable ID, type, location, biotype, and name, plus the genome assembly the coordinates are on. Useful for "what's in this locus?" and for seeding follow-
ensembl_predict_variantPredict the functional consequences of a sequence variant using the Ensembl Variant Effect Predictor (VEP). Accepts three input formats: HGVS notation (transcript-relative, e.g. ENST00000380152.8:c.2T>A, or genomic, e.g. 13:g.32316462T>A); region+allele (chr:start:end:strand/allele, e.g. 1:65568:655
ensembl_get_homologyFind orthologs and/or paralogs of a gene across species. Returns each homolog's stable ID, species, homology type (ortholog_one2one, ortholog_one2many, paralog_many2many, etc.), perc_id (percent identity), perc_pos (percent positives), and taxonomy level. Essential for cross-species research — for e
ensembl_get_xrefsRetrieve cross-database references for a gene or feature — HGNC, UniProt, EntrezGene, OMIM, RefSeq, Reactome, and others. Returns each xref with its database name, primary ID, display ID, and description. The dbname filter narrows to specific databases; omit to return all xrefs. IDs returned here ch