Family Tree

diseasesAvailable on FreeNo success wrapper

Returns the ancestor and descendant branches of a disease in the disease hierarchy, up to the requested depth, along with counts and whether the root key resolved. Call it to explore parent/child relationships around a disease. Returns 400 for invalid query parameters, 503 when the disease hierarchy is unavailable on this deployment, and 500 on internal failure.

When to use it

Explore a disease's parent and child relationships
Find ancestor diseases of a condition
List descendant diseases under a disease

Getting started

Base URL

https://app.caelrith.com/api/v1/tools

Authentication

Include your API key in the x-api-key header.

Rate limit

Every call counts against your workspace’s daily quota for disease-family-tree. Exceeding it returns HTTP 429.

Plans and daily limits

Plan	Available	Calls / day
free	yes	10
pro	yes	200
custom (default)	yes	10,000

Plan defaults. A custom workspace may carry per-tenant overrides.

Parameters

Path parameters

Parameter	Type	Required	Description
key(path)	string	Yes

Query parameters

Parameter	Type	Required	Description
depth	integer	No	Range 1-8; default 3 (range 1-8; default 3) Range: 1 to 8

Example request

curl -H "x-api-key: YOUR_API_KEY" \
  "https://app.caelrith.com/api/v1/diseases/{key}/family-tree"

Response envelope

This endpoint returns an implicit 2xx response - there is no success flag in the body.

{
  "data": { /* payload */ },
  "meta": { /* pagination, totals */ }
}

// No "success" flag on this endpoint - any 2xx JSON is a success.

Catalog version mcp-2026-10-28 · generated from the live MCP catalog