---
title: "Create entity"
method: POST
path: "/catalog/v1/entities"
tags: ["Generic Metadata Entities"]
---

# Create entity

`POST /catalog/v1/entities`

## Request

- Base URL: `https://your-environment.ataccama.one/api`
- URL: `https://your-environment.ataccama.one/api/catalog/v1/entities`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/ataccama/apis/ataccama-one-agentic-data-trust-platform-public-api/docs/catalog/v1/entities/post.ts> (a function with typed inputs; its response is checked against the schema)

Create a new entity of any concrete type defined in the metadata model.

The body must specify the `concreteType`, the `parentProperty` that holds child entities of this type on the parent,
and any initial `properties` defined in the metadata model.

The response returns the HTTP status code `201 Created` with the created entity.

## Request body

- NewGenericEntity
  - `concreteType` string, required: The concrete (most specific) type of the entity in the metadata model, for example, `businessTerm`.
  - `parentUrn` string, uri: A URN identifying a resource in any realm of the Public API. URNs follow RFC 8141. Format: urn:ata:{tenant}:{realm}:{resource-type}:{uuid} Components: - `urn` — fixed scheme - `ata` — Ataccama namespace - `{tenant}` — tenant identifier from the authentication context - `{realm}` — API realm, for example `catalog` or `reference-data` - `{resource-type}` — resource type within the realm, for example `catalog-item` or `table` - `{uuid}` — UUID (v4 or v7) of the resource Example: urn:ata:acme-corp:reference-data:table:123e4567-e89b-12d3-a456-426614174000.
  - `parentProperty` string, required: Name of the property on the parent that holds child entities of this type, as defined in the metadata model, for example, `terms`.
  - `properties` object: A map of properties to set on the new entity, keyed by property name as defined in the metadata model.

## Response `201`

Created entity.

- GenericEntity
  - `urn` string, uri, required: A URN identifying a resource in any realm of the Public API. URNs follow RFC 8141. Format: urn:ata:{tenant}:{realm}:{resource-type}:{uuid} Components: - `urn` — fixed scheme - `ata` — Ataccama namespace - `{tenant}` — tenant identifier from the authentication context - `{realm}` — API realm, for example `catalog` or `reference-data` - `{resource-type}` — resource type within the realm, for example `catalog-item` or `table` - `{uuid}` — UUID (v4 or v7) of the resource Example: urn:ata:acme-corp:reference-data:table:123e4567-e89b-12d3-a456-426614174000.
  - `parentUrn` string, uri: A URN identifying a resource in any realm of the Public API. URNs follow RFC 8141. Format: urn:ata:{tenant}:{realm}:{resource-type}:{uuid} Components: - `urn` — fixed scheme - `ata` — Ataccama namespace - `{tenant}` — tenant identifier from the authentication context - `{realm}` — API realm, for example `catalog` or `reference-data` - `{resource-type}` — resource type within the realm, for example `catalog-item` or `table` - `{uuid}` — UUID (v4 or v7) of the resource Example: urn:ata:acme-corp:reference-data:table:123e4567-e89b-12d3-a456-426614174000.
  - `rootSuperType` string, required: The root super type of the entity in the metadata model type hierarchy, for example, `term`.
  - `concreteType` string, required: The concrete (most specific) type of the entity in the metadata model, for example, `businessTerm`.
  - `properties` object: A map of properties defined for the entity in the metadata model. Only the properties you explicitly request through the `properties` query parameter are included. Property names must match the metadata model exactly. Supported property value types are scalars (string, number, Boolean), URN references, arrays of those, or `null`.
  - `effectiveStewardship` EffectiveStewardship: The stewardship that applies to an entity: either assigned directly to the entity or inherited from an ancestor, such as the source of a catalog item. Resolving effective stewardship takes additional processing time, so request it only when you need it.
    - `groupUrn` string, uri, required: A URN identifying a group resource in the IAM API. To find a group's URN, use the Groups endpoints of the IAM API. Format: urn:ata:{tenant}:iam:group:{uuid} Example: urn:ata:acme-corp:iam:group:123e4567-e89b-12d3-a456-426614174000.
    - `originUrn` string, uri, required: A URN identifying a resource in any realm of the Public API. URNs follow RFC 8141. Format: urn:ata:{tenant}:{realm}:{resource-type}:{uuid} Components: - `urn` — fixed scheme - `ata` — Ataccama namespace - `{tenant}` — tenant identifier from the authentication context - `{realm}` — API realm, for example `catalog` or `reference-data` - `{resource-type}` — resource type within the realm, for example `catalog-item` or `table` - `{uuid}` — UUID (v4 or v7) of the resource Example: urn:ata:acme-corp:reference-data:table:123e4567-e89b-12d3-a456-426614174000.

## Other responses

- `400`: Bad request. The request parameters or body are invalid.
- `403`: Forbidden. You do not have permission to access the requested resource.
- `404`: Not found. The requested resource does not exist.

---

[API](https://skmtc.dev/ataccama/apis/ataccama-one-agentic-data-trust-platform-public-api.md) - [All operations](https://skmtc.dev/ataccama/apis/ataccama-one-agentic-data-trust-platform-public-api/llms.txt) - [OpenAPI document](https://skmtc.dev/ataccama/apis/ataccama-one-agentic-data-trust-platform-public-api/revisions/46f16e0487f8?raw)