// SCAN REPORT

Ensembl MCP Server

25 tools. 0 can modify or destroy data without limits.

Read-only server. Low risk, but rate limits prevent runaway API costs.

Last updated: 4 Jul 2026

0 can modify or destroy data

25 read-only

25 tools total

Community server · catalogue entry verified 04/07/2026

How to control Ensembl MCP Server ↓

TOOL MAP

What Ensembl MCP Server exposes to your agents

Read (25) Write / Execute (0) Destructive / Financial (0)

Running more than one server? Check your whole stack →

THE RISK

What can go wrong

Even read-only tools carry cost. An agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up bills.

POLICY

How to control Ensembl MCP Server

PolicyLayer is an MCP gateway — it sits between your AI agents and Ensembl MCP Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Cap read operations

{
  "get_homology": {
    "limits": [
      {
        "counter": "get_homology_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Ensembl MCP Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON ENSEMBL →

Instant setup, no code required.

FULL CATALOGUE

All 25 Ensembl MCP Server tools

READ 25 tools

Read get_homology Get homologous genes/proteins across species Read get_ontology_ancestors Get ancestor terms for an ontology term Read get_ontology_by_id Get ontology term information by ID Read get_ontology_descendants Get descendant terms for an ontology term Read get_phenotype_by_gene Get phenotype annotations associated with a gene Read get_regulatory_features Get regulatory features in a genomic region Read get_sequence Get the DNA/RNA/protein sequence for a given region or feature Read get_taxonomy_by_id Get taxonomy information by ID Read get_taxonomy_classification Get taxonomic classification for a species Read get_variants_for_region Get genetic variants for a genomic region Read get_xrefs_by_gene Get external references (cross-references) for a gene Read get_xrefs_by_name Search cross-references by name Read get_xrefs_by_symbol Get cross-references for a gene symbol Read lookup_gene_by_id Look up a gene by its Ensembl stable ID (e.g., ENSG00000139618) Read lookup_gene_by_symbol Look up a gene by its symbol (e.g., BRCA2) and get detailed information including ID, location, and descriptio Read map_assembly Map coordinates between different genome assemblies Read map_cdna_to_region Map cDNA coordinates to genomic coordinates Read map_cds_to_region Map CDS coordinates to genomic coordinates Read map_translation_to_region Map protein coordinates to genomic coordinates Read overlap_id Get features that overlap a specific feature by ID Read overlap_region Get features that overlap a given genomic region Read overlap_translation Get features overlapping a translation (protein) Read search_ontology_by_name Search for ontology terms by name Read search_taxonomy_by_name Search taxonomy by name Read vep_region Predict variant consequences for a genomic region using the Variant Effect Predictor (VEP). Returns detailed c

FAQ

Questions about Ensembl MCP Server

Is the Ensembl MCP Server MCP server safe to use without restrictions? +

The Ensembl MCP Server server is primarily read-only with 25 read tools. While it cannot modify data, an agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up costs. Rate limiting is still recommended.

How many tools does the Ensembl MCP Server MCP server expose? +

25 tools across 1 categories: Read. 25 are read-only. 0 can modify, create, or delete data.

How do I enforce a policy on Ensembl MCP Server? +

Register the Ensembl MCP Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Ensembl MCP Server tool call.

Deterministic rules across all 25 Ensembl MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON ENSEMBL →

Instant setup, no code required.

25 Ensembl MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.