> 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/guardian/standard-registry/policies/formula-linked-definitions/apis-related-to-formula-linked/loads-import-a-file-and-return-its-preview.md).

# Loads (import) a file and return its preview

**`POST /api/v1/formulas/import/file/preview`**

Previews a formula ZIP import without persisting any changes to the database.

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

**Permission:** `Permissions.FORMULAS_FORMULA_CREATE`

***

## Request

### Request Body

Binary ZIP file containing the formula export to preview.

**Content-Type:** `application/zip`

***

## Response

### Success Response

**Status:** `200 OK`

```json
{
  "id": "63e3e5e8a01b3c001234abcd",
  "uuid": "c4a3b2d1-e5f6-7890-abcd-ef1234567890",
  "name": "Carbon Credit Calculator",
  "description": "Calculates carbon credits based on emission factors",
  "status": "DRAFT",
  "owner": "did:hedera:testnet:zHcDLGFNymFAJiMBKnpbHDgjvTn6yZnwkPPeFhtJBECH_0.0.4532001",
  "config": {}
}
```

### Error Responses

| Status                      | Description                   |
| --------------------------- | ----------------------------- |
| `400 Bad Request`           | Malformed or missing ZIP file |
| `401 Unauthorized`          | Missing or invalid token      |
| `403 Forbidden`             | Insufficient permissions      |
| `500 Internal Server Error` | Unexpected server failure     |