access Jira Zephyr testcase from API

[shyamalshivam]

Hi 
In jira cloud account, I have added app Zephyr and added some test cases, I want to access those testcases from Java program. I have created Jira API token as well as Zephyr API access token but i am not able to find correct base url to access testcases 

I have tried below url 

https://XXXXXXX.atlassian.net/rest/zephyr/1.0/testcases with Jira basic auth of email and jira api token but 404 error 

https://api.zephyrscale.smartbear.com/v2/testcases?projectKey=XXXX&maxResults=500&startAt=5500 with authorization header set as Bearer Jwt token but it says unknown token 

can someone guide me latest api base url for accessing testcases and cycle and result etc

[Matteo Vecchiato]

Duplicated question