ALM provides a REST API. See here for details:
https://admhelp.microfocus.com/alm/en/12.60/api_refs/REST_TECH_PREVIEW/ALM_REST_API_TP.html#REST_API_Tech_Preview/General/Overview.html%3FTocPath%3D_____1
I have not used this API but it would appear that you would need to authenticate using one of the methods in the How to Do Common Tasks section and then use one of the REST methods to access the relevant data, e.g. query a collection of entities or read an entity.
You probably want to configure your requests to have an Accept header requesting responses in JSON Format. You can then use the JSON Data node to convert the response body into tabular data, as required.
A simple example of using the HTTP node to request data is here:
https://support.infogix.com/hc/en-us/articles/360018962514-Construct-a-set-of-URLs-from-a-data-file
There is also a post on the forum that discusses how to accumulate cookies across a chain of HTTP nodes, here:
https://support.infogix.com/hc/en-us/community/posts/360028735334-Setting-cookies-in-a-HTTP-node
The online help for the HTTP node can be found here:
https://d3sa-preview.infogixsaas.com/docs/dist/help/Default.htm#e-node-help/Interfaces_and_Adapters/http.html%3FTocPath%3DNode%2520help%7CInterfaces%2520and%2520Adapters%7C_____9
[Edit: ^ Updated URL]