The Restful webservice API documentation for CA Service Desk Manager is not shipped with the out of the box product.
But, in case you want to create your own SDM RESTful webservice application, you may need the sample syntax how to use the interface functions.
To create the documentation you must run the pdm_rest_util command and copy the "jax-doclets-0.9.0.jar" file/archive to the sdm java\lib.

The jar file is not shipped with CA Service Desk Manager. So you have to "GOOGLE" for it or use the CA communities link below.

I can't find the CA service Desk Manager (SDM) RESTFUL webservice API documentation?

How can I find it? 

W2k12; MS-SQLw2k14; SDM 14.1.02; nx.env file varibale points to CA SC (shared components java).Example: NX_JRE_INSTALL_DIR=C:/Program Files (x86)/CA/SC/JRE/1.7.0_10Java Release is 1.7

Needed Environment:

W2k12; 

MS-SQLw2k14; 

SDM 14.1.02; 

nx.env file varibale points to CA SC (shared components java).

Example: NX_JRE_INSTALL_DIR=C:/Program Files (x86)/CA/SC/JRE/1.7.0_10

Java Release 1.7

Steps to do to generate the RESTful webservice API documentation:

1) download the doclets jar from this community entry:

   https://communities.ca.com/docs/DOC-231174222-generate-api-documentation-for-restful-services

2) copy "jax-doclets-0.9.0.jar" to %NX_ROOT%/java/lib 

3) stop SDM ; start SDM

4) open a command prompt in administrator mode

5) Run:  pdm_rest_util.cmd –undeploy

6) Run:  pdm_rest_util.cmd –deploy

7) verify that the api documentation is generated

Screenshots showing the result:

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Community link: 

 https://communities.ca.com/docs/DOC-231174222-generate-api-documentation-for-restful-services

CA Online documentation link:

https://docops.ca.com/ca-service-management/14-1/en/reference/ca-service-desk-manager-reference-commands/generate-api-documentation-for-restful-services