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Ensembl Mcp Server

io.github.cyanheads/ensembl-mcp-server · v0.7.1

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

Connect Remote server

Terminal
claude mcp add --transport http ensembl-mcp-server https://ensembl.caseyjhand.com/mcp
~/.cursor/mcp.json
{
  "mcpServers": {
    "ensembl-mcp-server": {
      "url": "https://ensembl.caseyjhand.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "ensembl-mcp-server": {
      "type": "http",
      "url": "https://ensembl.caseyjhand.com/mcp"
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://ensembl.caseyjhand.com/mcp

Tools 7 found in our last check

  • ensembl_list_species

    List 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 specie…

  • ensembl_lookup_gene

    Resolve 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…

  • ensembl_get_sequence

    Fetch 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 n…

  • ensembl_query_region

    Find 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?" an…

  • ensembl_predict_variant

    Predict 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/all…

  • ensembl_get_homology

    Find 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.), percId and percPos (percent identical and positive positions, over the target protein's length), and…

  • ensembl_get_xrefs

    Retrieve 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, plus how Ensembl assigned it (infoType, infoText) and its evidence codes (…

Details

Endpointhttps://ensembl.caseyjhand.com/mcp (Streamable HTTP)
Package@cyanheads/[email protected] (NPM, stdio)
Package@cyanheads/[email protected] (NPM, streamable-http)
First published29 Oct 2026
Last updated29 Oct 2026
Registry nameio.github.cyanheads/ensembl-mcp-server

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