# Data Exchange

Three kinds of data flow between your systems and Workist: incoming documents, master data and the results of processing. For each direction there are several ways that you can combine, e.g. master data via SFTP and results via API.

## Send documents to Workist {#dokumente}

- **Email:** Every channel has its own inbox address. See [Incoming documents](/en/docs/channel-configuration/incoming-documents.md).
- **Outlook add-in:** Staff send emails and attachments to a channel straight from Outlook. See [Outlook add-in](/en/docs/data-exchange/outlook-add-in.md).
- **API:** Your system uploads files through the [Document API](/en/docs/api-documentation/document-api.md#hochladen).
- **Workbench:** Users upload files directly in the channel.

## Transfer master data to Workist {#stammdaten}

- **[SFTP](/en/docs/data-exchange/sftp.md#stammdaten):** Your system places files in the `/export` folder of the Workist SFTP server.
- **[API](/en/docs/api-documentation/master-data-api.md):** Your system sends files or JSON data to the Master Data API.
- **Workbench:** Users upload files in the [Master Data Hub](/en/docs/master-data/master-data-hub.md).
- **[Connectors](/en/docs/data-exchange/connectors.md):** Some ERP connectors sync master data automatically.

## Transfer results to your system {#ergebnisse}

You set how a channel transfers its results in the channel under **Upload**: SFTP, AS2, API, ERP integration, manual or another way. New channels transfer via SFTP to the `/incoming` folder of the Workist server by default.

- **[SFTP](/en/docs/data-exchange/sftp.md#ergebnisse):** to the Workist SFTP server or to [your own SFTP server](/en/docs/data-exchange/sftp.md#eigener-server).
- **AS2:** to your AS2 receiver. See [Exported processed documents](/en/docs/channel-configuration/exported-documents.md).
- **[API](/en/docs/data-exchange/api.md):** Your system pulls the results and reports back whether the import worked.
- **[Connectors](/en/docs/data-exchange/connectors.md):** The results go directly into selected ERP systems. For Sage 100, Business Central and SAP ECC/S/4HANA, an extension is installed in the ERP. You set up all other connectors in the Workbench, without installation in the ERP.
- **[Webhooks](/en/docs/data-exchange/webhooks.md):** Workist notifies your system about events, e.g. when a document is finished. Webhooks complement the API.

![Overview Data Exchange: SFTP, API and Connectors](/img/data-exchange-en.png)