IntelliJ MCP connection

[Dorin_Goldin]

Hi,

Maybe someone encountered this problem..?

When trying to connect Atlassian MCP to IntelliJ we encountered this issue:

[7884] Fatal error: SseError: SSE error: TypeError: fetch failed: Headers Timeout Error
at _eventSource.onerror (file:///C:/Users/xxxx/AppData/Local/npm-cache/_npx/705d23756ff7dacc/node_modules/mcp-remote/dist/chunk-OXNXVROF.js:12899:23)
at EventSource.scheduleReconnect_fn (file:///C:/Users/xxxx/AppData/Local/npm-cache/_npx/705d23756ff7dacc/node_modules/mcp-remote/dist/chunk-OXNXVROF.js:12800:53)
at file:///C:/Users/xxxx/AppData/Local/npm-cache/_npx/705d23756ff7dacc/node_modules/mcp-remote/dist/chunk-OXNXVROF.js:12650:174 {
code: undefined,
event: {
type: 'error',
message: 'TypeError: fetch failed: Headers Timeout Error',
code: undefined,
defaultPrevented: false,
cancelable: false,
timeStamp: 306624.4692

 Tried adding headers manually to json.mcp and updating IntelliJ to latest.

any thoughts?

Thanks!

[Tomislav Tobijas]

Hi @Dorin_Goldin ,

I'm no expert here, so I'll move this question to Rovo forum group so someone can chime in.
But, based on the error, you might want to check the following:

1. Check network and service availability > ensure a stable internet connection and that no firewall, proxy or VPN is blocking outbound connections
   MCP is beta, and it may experience downtime
2. Verify MCP server URL > double-check that you're using the correct endpoint:

   https://<mcp-server-domain>/v1/sse

3. Update tools and dependencies > make sure everything is up to date (IntelliJ and MCP-related plugins)
   You could run MCP commands if you're using Node.js or npm to check the versions.
4. Authentication > if/when prompted for authorization, ensure that local OAuth callbacks are not blocked by security software

Some resources might be helpful when talking about MCP:

• Help Center / Atlassian MCP 
• Atlassian Rovo MCP Server (forum discussion group) 

Cheers,
Tobi