About io.github.cyanheads/gnomad-genetics-mcp-server
io.github.cyanheads/gnomad-genetics-mcp-server is an MCP server in the RAG category: look up allele frequencies by ancestry, gene constraint, variants, and coverage over gnomAD.
Install
claude mcp add io-github-cyanheads-gnomad-genetics-mcp-server -- npx -y @cyanheads/gnomad-genetics-mcp-servernpx -y @cyanheads/gnomad-genetics-mcp-serverThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
Tools (8)
gnomad_dataframe_describeList the tables staged on a canvas and their columns before writing SQL.
Parameters not published.
gnomad_dataframe_dropDrop a named table from a canvas to reclaim memory. Opt-in via `GNOMAD_DATAFRAME_DROP_ENABLED=true` — off by default since per-table TTL already handles cleanup.
Parameters not published.
gnomad_dataframe_queryRun a read-only SQL `SELECT` across canvas tables staged by the list tools.
Parameters not published.
gnomad_get_coverageSequencing coverage across a gene, transcript, or region — mean/median depth and the fraction of samples over depth thresholds, per callset track. Tells a true absent variant from an uncallable position.
Parameters not published.
gnomad_get_gene_constraintGene loss-of-function constraint — pLI, LOEUF (`oe_lof_upper`) with CI, observed/expected ratios, and Z-scores. By HGNC symbol or Ensembl gene ID.
Parameters not published.
gnomad_get_variantFull population record for one or more variants — AC/AN/AF overall and per genetic-ancestry group, homozygote/hemizygote counts, quality flags, transcript consequence, in-silico predictors, and joined ClinVar significance. Batch up to 25 IDs with per-item partial success.
Parameters not published.
gnomad_list_gene_variantsEvery variant in a gene, transcript, or region with allele frequencies and predicted consequences, filterable by consequence class and max AF. Spills to the `gene_variants` canvas table.
Parameters not published.
gnomad_search_clinvarGene-level ClinVar detail via NCBI E-utilities — classified variants, review status (star rating), conditions, and submission counts. Spills to the `clinvar_variants` canvas table.
Parameters not published.
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