---
title: "Celtic Tree Compatibility (凱爾特樹)"
method: GET
path: "/api/trpc/compatibility.celticTree"
tags: ["Western"]
---

# Celtic Tree Compatibility (凱爾特樹)

`GET /api/trpc/compatibility.celticTree`

## Request

- Base URL: `https://api.asktian.com`
- URL: `https://api.asktian.com/api/trpc/compatibility.celticTree`
- Auth: HTTP bearer

PROVENANCE: a MODERN system — Robert Graves invented this 13-sign tree calendar in The White Goddess (1948); it is not attested in any ancient or medieval Celtic source (the Ogham alphabet and the medieval kennings are genuine, the calendar and date ranges are not). Celtic Tree-sign compatibility — each person's tree sign from birth date with relationship type and harmony score.

Cost: 2 TIAN Points per call. tRPC procedure `compatibility.celticTree`.

## Query parameters

- `input` string

## Response `200`

tRPC result envelope

- TrpcResult: tRPC HTTP response envelope.
  - `result` object
    - `data` object: The procedure's return value (system-specific).

---

[API](https://skmtc.dev/asktian/apis/asktian-metaphysics-api.md) · [All operations](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/llms.txt) · [OpenAPI document](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/revisions/3c8fdc979206?raw)