Human GRCh37 Assembly Summary: Chromosome Lengths, Karyotype, Accession (Ensembl GRCh37)

ensemblrestgrch37/assembly-info

Returns the Ensembl summary of the human GRCh37 (hg19) reference assembly: assembly name (GRCh37.p13) and accession, assembly and gene build dates, the karyotype, the coordinate system versions, the golden path length and every top-level region (chromosomes 1-22, X, Y, MT and unplaced supercontigs) with its length in base pairs. Takes no input. Ensembl data, passed through unmodified and served by Eden Engine; not an official Ensembl product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

Ensembl

Source: Ensembl (EMBL-EBI), https://www.ensembl.org, retrieved through the Ensembl GRCh37 REST API. Served by Eden Engine; not an official Ensembl product.

Use it

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "ensemblrestgrch37/assembly-info" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "ensemblrestgrch37/assembly-info" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "ensemblrestgrch37/assembly-info", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "ensemblrestgrch37/assembly-info", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 24, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "assembly_name",
    "top_level_region"
  ],
  "properties": {
    "karyotype": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Chromosome names in karyotype order."
    },
    "golden_path": {
      "type": "integer",
      "description": "Total length of the golden path in base pairs."
    },
    "assembly_date": {
      "type": "string"
    },
    "assembly_name": {
      "type": "string",
      "description": "For example GRCh37.p13."
    },
    "genebuild_method": {
      "type": "string"
    },
    "top_level_region": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "length": {
            "type": "integer"
          },
          "coord_system": {
            "type": "string"
          }
        },
        "additionalProperties": true
      },
      "description": "Every chromosome and supercontig with `name`, `coord_system` and `length`."
    },
    "assembly_accession": {
      "type": "string"
    },
    "genebuild_start_date": {
      "type": "string"
    },
    "coord_system_versions": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "default_coord_system_version": {
      "type": "string"
    },
    "genebuild_last_geneset_update": {
      "type": "string"
    },
    "genebuild_initial_release_date": {
      "type": "string"
    }
  },
  "description": "The Ensembl assembly summary.",
  "additionalProperties": true
}