Human Phenotype Ontology Ancestor Terms: Every Broader Phenotype Up to the Root

jaxontologyhp/get-ancestors

Returns every ancestor of a Human Phenotype Ontology (HPO) term: all the broader phenotypes above it, up to the root, each with its HP id, label, descendant count and translations. The root term has none and returns an empty list. Data from the Human Phenotype Ontology (human-phenotype-ontology.org), the current release served by ontology.jax.org, passed through unaltered and served by Eden Engine; not an official HPO or Jackson Laboratory 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 $5.

Data source

Human Phenotype Ontology

Data from the Human Phenotype Ontology (HPO), served by the Jackson Laboratory ontology service at ontology.jax.org (current release; the service reports no version). This service is using the Human Phenotype Ontology. Find out more at http://www.human-phenotype-ontology.org. Please cite: Köhler S, et al. The Human Phenotype Ontology project: linking molecular biology and disease through phenotype data. Nucleic Acids Res. 2014;42(D1):D966-D974, doi:10.1093/nar/gkt1026. Content passed through unaltered. Served by Eden Engine; not an official HPO or Jackson Laboratory 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: "jaxontologyhp/get-ancestors" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "jaxontologyhp/get-ancestors" })

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

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

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "term_id"
  ],
  "properties": {
    "term_id": {
      "type": "string",
      "pattern": "^HP:[0-9]{7}$",
      "description": "An HPO term id: HP: followed by seven digits, for example HP:0001250 (Seizure) or HP:0001166 (Arachnodactyly)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "results"
  ],
  "properties": {
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "description": "The HPO term id, HP: and seven digits."
          },
          "name": {
            "type": "string",
            "description": "The term's English label."
          },
          "translations": {
            "type": [
              "array",
              "null"
            ],
            "items": {
              "type": "object",
              "additionalProperties": true
            },
            "description": "Translations of the term's name and definition: `language` (a two-letter code), `name`, `definition` and `status` (OFFICIAL or CANDIDATE). Can be null on search hits."
          },
          "descendantCount": {
            "type": "integer",
            "description": "How many terms lie below this one in the hierarchy."
          }
        },
        "additionalProperties": true
      }
    }
  },
  "description": "The service's root array, wrapped under `results`: one node per term. Empty when the term has none.",
  "additionalProperties": true
}