Is there any documentation or web link available which lists all Aras REST APIs with sample request and response?
I'm not a hundred percent sure, but I believe the REST documentation was not made available to the general public by Aras. You can only get it from the CD image which you get from Aras with your subscription.
But the link in my last reply should still give you an overview, even without the PDF.
Cogres is correct. The REST documentation is only available on the CD image that subscribers have access to.
The Aras REST API uses the OData 2.0 protocol, so you can check the conventions to that for more information on the general format of an Aras REST call.
In addition to the introductory blog post cogres mentioned, we also recently released a blog post on performing complex queries with the REST API. If you have a question or want to see an example that's not covered in any of our current blogs, please let me know. I'm planning on doing a few more blogs on the REST API, so I can include an answer in those.