C# SDK Authentication Issues with Jira REST API

I’m trying to connect to Jira using a C# SDK but keep getting authentication errors. Here’s my current setup:

var jiraClient = Atlassian.Jira.Jira.CreateRestClient(new JiraRestClient("https://mycompany.atlassian.net", "[email protected]", "mypassword"));

var newTicket = jiraClient.CreateIssue("SampleProject");
newTicket.Type = "Task";
newTicket.Priority = "High";
newTicket.Summary = "Test Issue Creation";

var saveResult = await newTicket.SaveChangesAsync();

The error message I’m getting is You are not authenticated. Authentication required to perform this operation.

I can log into the Jira web interface using the same email and password without any problems. I already tried URL encoding the credentials but that didn’t work either. Has anyone faced similar authentication problems with Jira’s REST client? Should I be using something different than my login email for the username parameter?

Same thing happened to me last month! Jira Cloud stopped accepting regular passwords for API calls. You need to generate an API token from your Atlassian account settings and use that instead. Keep your email the same though.

Had this exact problem migrating our legacy integration. Yeah, it’s the API token requirement, but there’s another gotcha - make sure you’re using the right base URL format. The SDK sometimes expects just the domain, not the full path. Also check if your Jira instance has IP restrictions or extra security policies. Our admin had SAML-only auth configured, which blocked API tokens until they whitelisted our app. One more thing - verify your project permissions. Even with valid auth, you’ll get weird auth errors if your user doesn’t have create issue permissions for that project. Test with a simple GET request first to confirm the token works before trying to create issues.

This authentication issue is super common. Jira Cloud dropped basic auth with passwords - you need API tokens now.

Hit your Atlassian account settings, generate an API token, and swap it for your password in the code. Keep using your email as the username.

But honestly? SDK authentication and token security is a massive headache. I’ve dealt with this pain across tons of APIs.

I switched to handling Jira integrations through automation workflows instead. No more code authentication wrestling or token nightmares. Set up your Jira connection once, then build whatever workflows you want.

I create issues, update tickets, sync between systems, trigger actions from Jira events. Way cleaner than jamming API calls into applications.

Authentication runs automatically, I can tweak logic without code changes, and adding other services is dead simple.

Check it out: https://latenode.com

Yeah, the API token switch has been covered, but I learned something the hard way when setting this up for our team. Your code looks right, but you might still get auth issues after switching if you’re behind a corporate firewall or VPN. We had random failures that turned out to be our network messing with HTTPS requests to Atlassian’s servers. Test your auth from different networks first. Also, make sure your Jira project key in CreateIssue matches exactly - case sensitivity is pickier than you’d think. When I was debugging this stuff, I wrapped the auth call in try-catch and logged the full exception details, not just the message. The inner exceptions usually have better info about whether it’s actually auth or something else like timeouts or project access problems.