For EE Jira 9.17.5, should I use REST API v3 or v2? what the difference?

[harry sheng]

The jira server is EE 9.17.5

I use this endpoint URL (/rest/api/2/issue/<jira-ticket-key>?fields=key,summary) to retrieve the jira ticket info, with Authorization header, and Accept header set to application/json.

It seems the rest server needs warm up. The first couple tries always come back with 500 code (internal server error); eventually the GET request comes back with 200 code, with content in JSON format.

Then I tried with the v3 api (/rest/api/3/issue/<jira-ticket-key>?fields=key,summary) with exactly the same headers. The response code is 200, but the content is in HTML format.

[Sunny Ape]

Hello @harry sheng 

1. The Jira CLOUD product has both a v2 and v3 version of its REST API.
2. The Jira DATA CENTER product (what you are accessing) has only a v2 REST API... there is no v3 REST API for that product.

Refer to the Jira DC v9.17.5 REST API documentation.

[Jayesh]

Hello @harry sheng 

Jira has depcreciated the v2 API, so you need to use the v3 API.

You can get more information on below Atlassian KB articles

https://developer.atlassian.com/server/jira/platform/integrating-with-jira-server/

https://developer.atlassian.com/server/jira/platform/rest/v11001/intro/#gettingstarted

Thanks
Jayesh R

[Sunny Ape]

Jira has depcreciated the v2 API, so you need to use the v3 API.

That is completely wrong @Jayesh 

The v2 REST API absolutely has not been deprecated, and given that the OP is using Jira DATA CENTER, which does not have a v3 REST API, your advice would be impossible for them to follow.

[Jayesh Raghuvanshi]

@Sunny Ape  Thanks for the clarification, appreciated your response.

[Jayesh Raghuvanshi]

Hello @harry sheng 

Yes v2 api is depreciated by Jira you will need to use v3 API only.

[Sunny Ape]

That is completely wrong @Jayesh Raghuvanshi 

The v2 REST API absolutely has not been deprecated, and given that the OP is using Jira DATA CENTER, which does not have a v3 REST API, your advice would be impossible for them to follow.