# OCR services

> OCR services are used for the following purposes:

## About OCR services

OCR services are used for the following purposes:

* At data labeling time, when importing documents into Document Manager. The engines available for this step are UiPath Document OCR, Google Cloud Vision OCR, and Microsoft Read OCR.
* At run time when calling models from RPA workflows. Visit [OCR Engines](https://docs.uipath.com/document-understanding/automation-cloud/latest/classic-user-guide/ocr-engines#ocr-engines) to check the engines available for this step.

## Configure OCR service in Document Manager and AI Center Document Understanding™ ML packages

The following table describes how to configure the six supported OCR engine types in both Document Manager and AI Center.

:::important
The `ocr.method` argument corresponds to the OCR Engine dropdown in the ML Package creation view in AI Center.
:::

| **OCR Engine** | **OCR Method** | **OCR Key** | **OCR URL** |
| --- | --- | --- | --- |
| UiPath | UiPath Document OCR (Cloud and On-Premises)  UiPathDocumentOCR_CPU(On-Premises)  OCR for Chinese, Japanese, Korean (Cloud and On-Premises) | Automation Suite API Key  **Enterprise Plan** | The ML Skill URL generated after deploying UiPath Document OCR. |
| Google | Google Cloud Vision OCR | GCP Console API Key | `https://vision.googleapis.com/v1/images:annotate` |
| Microsoft Read 2.0 On-Prem | Microsoft Read OCR | None | `http://<IP_addr>:<port_number>/vision/v2.0/read/core/Analyze` |
| Microsoft Read 2.0 Azure | Microsoft Read OCR | API Key for your resource from Azure Portal | `<Azure_resource_Endpoint>/vision/v2.0/read/core/asyncBatchAnalyze` |
| Microsoft Read 3.2 On-Prem | Microsoft Read OCR | None | `http://<IP_addr>:<port_number>/vision/v3.2/read/analyze` |
| Microsoft Read 3.2 Azure | Microsoft Read OCR | API Key for your resource from Azure Portal | `<Azure_resource_Endpoint>/vision/v3.2/read/analyze` |