Documentation can be found by going to the Support Website https://support.precisely.com
Select the Products tile
Select Trillium Quality and Discovery
You will then be brought to this page
https://support.precisely.com/products/trillium-quality-and-discovery/
which has links to the documentation for both version 16.1 & 17.1 and selecting the version dropdown, you can also get to version 15.7 documentation.
The specific URL from the page above for TSS REST API is
https://docs.precisely.com/docs/sftw/trillium_quality_discovery/16.1%20and%20later/en-us/webhelp/RestAPI/html/index.html
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Lee Henty
Precisely Software Inc.
Reading
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