---
title: "Define Semantic Record"
method: POST
path: "/define"
---

# Define Semantic Record

`POST /define`

## Request

- Base URL: `https://mcp.physea.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://mcp.physea.ai/define`
- Auth: none declared

Bind canonical DEFINE to the existing typed SemanticRecord producer.

## Request body

- DefineRequest: Canonical DEFINE input. ``object`` remains accepted as a compatibility spelling for the former motherboard-local endpoint; new callers should send ``subject``.
  - `subject` unknown
  - `object` unknown
  - `namespace` string, nullable
  - `domain` string, nullable
  - `reference_ref` string, nullable
  - `attributes` object, nullable
  - `leaf` object, nullable
  - `associations` unknown
  - `aliases` unknown
  - `roles` unknown

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/physea/apis/liminality-router-service.md) · [All operations](https://skmtc.dev/physea/apis/liminality-router-service/llms.txt) · [OpenAPI document](https://skmtc.dev/physea/apis/liminality-router-service/revisions/5f60ddd97544?raw)