I want to integrate BMC Remedy with some other tool. So I am thinking of calling curl command to fetch some change request status from Remedy. Does BMC Remedy expose REST APIs ? How can we call them using curl ?
BMC has a Load of webservices as a default. You can read more on their documentation site regarding how they are exposed:
https://docs.bmc.com/docs/display/public/ars81/Web+service+standards
They are exposed as WDSL. You can ask your Remedy Admins to provide a list with the URLs etc. If you are running the ITSM suite, there are several ootb webservices, but depending on your needs, you may need to have some custom ones created...
Note that this is not an answer that fits all versions of Remedy. newer versions may expose REST APIs. As is stated in other answers, as of version 9.0, yes BMC exposes REST API. Both for ARS and CMDB. More info here.