> For the complete documentation index, see [llms.txt](https://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://guardian.hedera.com/schemas/schema-related-apis-for-asynchronous-execution/previews-the-schema-from-ipfs.md).

# Previews the Schema from IPFS

**`POST /schemas/push/import/message/preview`**

Previews a schema from IPFS asynchronously without importing it into the local database. Returns a task ID immediately; poll `GET /tasks/{taskId}` for the result.

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

**Permission:** `Permissions.SCHEMAS_SCHEMA_CREATE`

***

## Request

### Request Body

```json
{
  "messageId": "1680000000.000000001"
}
```

| Field       | Type   | Required | Description                                                 |
| ----------- | ------ | -------- | ----------------------------------------------------------- |
| `messageId` | string | Yes      | The Hedera message ID containing the IPFS CID of the schema |

***

## Response

### Success Response

**Status:** `202 Accepted`

```json
{
  "taskId": "63e3e5e8a01b3c001234abcd",
  "expectation": "Preview schema message"
}
```

Poll `GET /tasks/{taskId}` to retrieve the preview result.

### Error Responses

| Status                      | Description               |
| --------------------------- | ------------------------- |
| `401 Unauthorized`          | Missing or invalid token  |
| `403 Forbidden`             | Insufficient permissions  |
| `422 Unprocessable Entity`  | Message ID is missing     |
| `500 Internal Server Error` | Unexpected server failure |


---

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