401 Errors When Connecting to Jira Data Center 10.3.4 Locally via REST API using PAT

[Jeel]

I’m trying to connect to a local Jira Data Center instance (version 10.3.4) running on http://localhost:8080 from a Node.js Express app running on http://localhost:5000. My goal is to authenticate using either a Personal Access Token (PAT) However, I keep getting 401 Unauthorized with PAT. I’m testing locally as an admin user, and I can log into Jira via the browser, but the API calls fail.

Setup

• Jira: Data Center 10.3.4 on http://localhost:8080 (local install).
• Route: GET to fetch user info via /rest/api/3/myself.
• Authentication Tried:
  • PAT with Authorization: Bearer <pat> (401 error).
• User: Admin with full permissions (can log in via UI and create PATs).
• using this jira local instance under free license.

-> how can i utilize rest apis operations to this local jira instance

[Vishal Biyani]

@Jeel 

Can you try to pass PAT in the header as part of your json payload?

Authorization: Bearer <PAT>

See this link for more details

Using Personal Access Tokens | Atlassian Support | Atlassian Documentation

[Jeel]

thanks for the guide @Vishal Biyani 

I figure out the issue but don't know why this happening. If I use the rest/api/2/myself end-point that it gives expected json response but if I use rest/api/3/myself than I got html page as a response with 200. 

[Vishal Biyani]

This is something to do with data center version. Probably rest/api/3/myself is not supported