> For the complete documentation index, see [llms.txt](https://dev.guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.guardian.hedera.com/developer-tools-and-resources/api-reference/schema-creation-using-the-guardian-apis/updating-schema.md).

# Updating Schema

**`PUT /api/v1/schemas`**

Updates an existing schema. The schema to update is identified by the `id` field in the request body. Only users with the Standard Registry role are allowed to make this request. Published or demo-mode schemas cannot be updated.

**Authentication:** Bearer token required (`Authorization: Bearer <token>`)

**Permission:** `Permissions.SCHEMAS_SCHEMA_UPDATE`

***

## Request

### Request Body

```json
{
  "id": "63e3e5e8a01b3c001234abcd",
  "name": "Updated Carbon Offset Schema",
  "description": "Updated description for carbon offset reporting",
  "entity": "VC",
  "category": "POLICY",
  "document": {
    "$schema": "http://json-schema.org/draft-07/schema",
    "type": "object",
    "properties": {}
  }
}
```

| Field         | Type   | Required | Description                                  |
| ------------- | ------ | -------- | -------------------------------------------- |
| `id`          | string | Yes      | Internal database ID of the schema to update |
| `name`        | string | No       | Updated human-readable name                  |
| `description` | string | No       | Updated description                          |
| `entity`      | string | No       | Schema entity type                           |
| `category`    | string | No       | Schema category                              |
| `document`    | object | No       | Updated JSON Schema document                 |

***

## Response

### Success Response

**Status:** `200 OK`

```json
[
  {
    "id": "63e3e5e8a01b3c001234abcd",
    "uuid": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "name": "Updated Carbon Offset Schema",
    "description": "Updated description for carbon offset reporting",
    "entity": "VC",
    "status": "DRAFT",
    "version": "",
    "topicId": "0.0.1234567",
    "owner": "example_user"
  }
]
```

### Error Responses

| Status                      | Description                                                 |
| --------------------------- | ----------------------------------------------------------- |
| `401 Unauthorized`          | Missing or invalid token                                    |
| `403 Forbidden`             | Insufficient permissions or schema is owned by another user |
| `404 Not Found`             | Schema with the provided ID does not exist                  |
| `422 Unprocessable Entity`  | Schema is already published or imported in demo mode        |
| `500 Internal Server Error` | Unexpected server failure                                   |