> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.app/llms.txt
> Use this file to discover all available pages before exploring further.

# List Processor Versions

> Retrieve all versions of a specific processor in Extend.

This endpoint allows you to fetch all versions of a given processor, including the current `draft` version.

* Versions are typically returned in descending order of creation (newest first), but this should be confirmed in the actual implementation.
* The `draft` version is the latest unpublished version of the processor, which can be published to create a new version. It might not have any changes from the last published version.

### Path Parameters

<ParamField path="id" type="string" required>
  The ID of the processor to retrieve versions for.
</ParamField>

### Response

<ResponseField name="success" type="boolean">
  A true or false value indicating whether the request was successful or not.
</ResponseField>

<ResponseField name="versions" type="array">
  An array of ProcessorVersion objects representing all versions of the
  specified processor. See the [ProcessorVersion
  object](/api-reference/objects/processor_version) for more details on the
  structure of each version.
</ResponseField>

### Error Responses

<ResponseField name="success" type="boolean">
  Will be `false` if the request failed.
</ResponseField>

<ResponseField name="error" type="string">
  A description of the error that occurred.
</ResponseField>

#### Possible Errors

* **404 Not Found**: If the specified processor does not exist.

<ResponseExample>
  ```json Example Success Response theme={null}
  {
    "success": true,
    "versions": [
      {
        "object": "document_processor_version",
        "id": "processor_version_5678",
        "processorId": "processor_1234",
        "processorType": "EXTRACT",
        "description": "Updated extraction rules for invoice processing",
        "version": "1.2",
        "config": {
          // Config object - see “Processor configs” for details
        },
        "createdAt": "2024-03-01T14:00:00Z",
        "updatedAt": "2024-03-01T14:00:00Z"
      },
      {
        "object": "document_processor_version",
        "id": "processor_version_5677",
        "processorId": "processor_1234",
        "processorType": "EXTRACT",
        "description": "Initial version",
        "version": "0.1",
        "config": {
          // Config object - see “Processor configs” for details
        },
        "createdAt": "2024-02-15T10:00:00Z",
        "updatedAt": "2024-02-15T10:00:00Z"
      }
    ]
  }
  ```
</ResponseExample>