> 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/run-formula-without-making-any-persistent-changes-or-executing-transaction..md).

# Run formula without making any persistent changes or executing transaction.

**`PUT /api/v1/formulas/{formulaId}/dry-run`**

Runs a formula in dry-run mode without making any persistent changes or executing blockchain transactions.

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

**Permission:** `Permissions.FORMULAS_FORMULA_CREATE`

***

## Request

### Path Parameters

| Parameter   | Type   | Required | Description                           |
| ----------- | ------ | -------- | ------------------------------------- |
| `formulaId` | string | Yes      | Database ID of the formula to dry-run |

***

## 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": "DRY-RUN",
  "owner": "did:hedera:testnet:zHcDLGFNymFAJiMBKnpbHDgjvTn6yZnwkPPeFhtJBECH_0.0.4532001",
  "policyId": "63e3e5e8a01b3c001234abcd",
  "config": {}
}
```

### Error Responses

| Status                      | Description                               |
| --------------------------- | ----------------------------------------- |
| `401 Unauthorized`          | Missing or invalid token                  |
| `403 Forbidden`             | Insufficient permissions                  |
| `404 Not Found`             | Formula with the given ID does not exist  |
| `422 Unprocessable Entity`  | `formulaId` parameter is missing or empty |
| `500 Internal Server Error` | Unexpected server failure                 |