---
title: "Create KG node"
method: POST
path: "/api/v0/knowledge-graphs/{kg_id}/nodes"
tags: ["Knowledge Graphs"]
---

# Create KG node

`POST /api/v0/knowledge-graphs/{kg_id}/nodes`

## Path parameters

- `kg_id` string, uuid, required

## Request body

- NodeCreateRequest
  - `type_id` string, required
  - `name` string, required
  - `attributes` object
  - `selector` object, nullable
  - `confidence` number, nullable

## Response `200`

Successful Response

- NodeResponse — A :class:`KGNode` — a representation occurrence or a domain entity. ``tier`` distinguishes the two: a ``representation`` node carries a ``selector`` (its editable page-region geometry) and no domain semantics; a ``domain`` node carries no selector. ``confidence`` / ``source`` record how the node came to exist (detector confidence, ``pipeline`` / ``user`` / ``import``).
  - `id` string, uuid, required
  - `knowledge_graph_id` string, uuid, required
  - `tier` 'representation' | 'domain', required
  - `type_id` string, required
  - `name` string, required
  - `attributes` object, required
  - `derived` object
  - `selector` object, nullable
  - `confidence` number, nullable
  - `source` string, required
  - `created_at` string, date-time, required
  - `updated_at` string, date-time, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/outerport/apis/outerport-api.md) · [All operations](https://skmtc.dev/outerport/apis/outerport-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/outerport/outerport-api/revisions/f565b46daaea/schema)