Some Json Rest API not working

Hi friends, please help to solve this issue.

List of API’s which gives 404 error.

  1. Contexts
  2. Email Templates
  3. Sites

Url :
https://ojscloud.com/ojs/index.php/ijnrd/api/v1/contexts?apiToken
https://ojscloud.com/ojs/index.php/ijnrd/api/v1/emailTemplates?apiToken
https://ojscloud.com/ojs/index.php/ijnrd/api/v1/site?apiToken