Cortexa research tool·biomedical·opentree

OpenTree Get Mrca

Find the Most Recent Common Ancestor (MRCA) of a set of taxa in the Open Tree of Life synthetic phylogeny. Takes two or more OTT IDs and returns their MRCA with its taxonomic name and rank. Essential for understanding evolutionary relationships between species. Example: OTT IDs 770315 (Homo sapiens) and 417950 (Pan troglodytes) gives MRCA in subfamily Homininae.

Livelast probed 2026-04-30 23:07Z· 97msCortexa

Status

The most recent probe succeeded. Safe to call from the agent today.

Last probed: 1d ago
Last success: 1d ago
Last latency: 97ms

Schema

JSON Schema the agent (or your API call) must match.

{
  "properties": {
    "ott_ids": {
      "description": "Comma-separated OTT IDs (at least 2). Use OpenTree_match_names to get IDs. Examples: '770315,417950' (human + chimp), '770315,417950,158484' (human + chimp + bonobo), '244265,417950' (fruit fly + chimp).",
      "type": "string"
    }
  },
  "required": [
    "ott_ids"
  ],
  "type": "object"
}

Examples (1)

Default OpenTree Get Mrca call

public-safeinput

{
  "ott_ids": ""
}

Expected response keys: success

Anonymous-safe example. Rate-limited; no sign-in required.

Identifiers

Catalog ID: tu_OpenTree_get_mrca
Tool name: OpenTree_get_mrca
Added: 2026-04-30 22:47Z
Tags: tooluniverse

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