Fixup URL and expand description for Python CLI/Library

Co-authored-by: Kabilar Gunalan <[email protected]>

Author: yarikoptic

docs/user-guide-using/accessing-data/index.md

@@ -20,9 +20,9 @@ The best method for accessing data depends on your specific needs:
 - **For browsing and exploring data**: Use the [Web Interface](./downloading.md#using-the-dandi-web-application).
 - **For downloading entire Dandisets**: Use the [DANDI CLI](./downloading.md#using-the-python-cli-client).
 - **For version control and reproducibility**: Use [DataLad](./downloading.md#using-datalad).
-- **For integration with existing tools**: Use [WebDAV](./downloading.md#using-webdav), [DANDI CLI](./downloading.md#using-the-python-cli-client), [DANDI Python Client](https://dandi.readthedocs.io/) or [DANDI API](./external-services.md#dandi-api) depending on the tool language/interfaces.
+- **For integration with existing tools**: Use [WebDAV](./downloading.md#using-webdav), [DANDI Python and Command-line Client](./downloading.md#using-the-python-cli-client), or [DANDI API](./external-services.md#custom-integrations) depending on the tool language/interfaces.
 - **For cloud-based analysis**: Use [DANDI Hub](../dandi-hub.md).
-- **For programmatic access**: Use the [DANDI Python Client](https://dandi.readthedocs.io/) for Python or the [DANDI API](./external-services.md#dandi-api) for other languages.
+- **For programmatic access**: Use the [DANDI Python Client](https://dandi.readthedocs.io/) for Python or the [DANDI API](./external-services.md#custom-integrations) for other languages.
 
 ## Data Access Considerations