# List the transactions of a sale

`GET https://{domain}/api/v2/transaction/external/{engine}/{engine_id}`

Operation ID: `transactions.list_by_external_id` · API v2

Lists the events Cademí received from a gateway for a sale or subscription ID, oldest first. No match returns an empty list.

## Parameters

| Name | In | Type | Required | Description |
|---|---|---|---|---|
| `engine` | path | string | yes | Gateway key. |
| `engine_id` | path | string | yes | Sale ID or subscription ID at the gateway. |

## Responses

### 200

The transactions.

Body: object.

### 401

The Authorization header is missing, or the key does not exist or was deleted.

Body: HandlerError.

Full schema: https://cademi.dev/openapi/v2.json