# Start the extraction fields request

> :::tip
The Project ID is obtained from the response received from the [Get project information](https://docs.uipath.com/document-understanding/automation-suite/2024.10/api-guide/use-the-discovery-service) call.
:::

## Start extracting fields from a document

:::tip
The Project ID is obtained from the response received from the [Get project information](https://docs.uipath.com/document-understanding/automation-suite/2024.10/api-guide/use-the-discovery-service) call.
:::

```
curl -X 'POST' \
  'https://{fqdn}/<Organization_Name>/<Tenant_Name>/du_/api/framework/projects/<Project_ID>/extractors/invoices/extraction/start?api-version=1' \
  -H 'accept: text/plain' \
  -H 'Authorization: Bearer eyJhbGciO***CyAQu-qA' \
  -H 'Content-Type: application/json' \
  -d '{
  "documentId": "25a03e48-cfe8-ed11-9f75-000d3a4964af"
}'
```

## Response of extracting fields from a document

```
{ "operationId": "eee0a911-dfe8-ed11-907c-6045bd9d17d0" }
```