The SystemLink HTTP API for LabVIEW allows you to programmatically access SystemLink data services from NI LabVIEW.
The source code can be found at
https://code.hampel-soft.com/commercial/systemlink-http-api-for-labview
You can find detailed information about SystemLink's HTTP API here:
https://www.ni.com/docs/en-US/bundle/systemlink-api/page/http-api-reference.html