Confluence MCP POST /v1/sse 404

[travispowell]

I am trying to use the MCP endpoint but I keep getting a 404 error when connecting.

2025-11-13 22:31:30.198 | DEBUG | httpcore._trace:atrace:87 - send_request_headers.started request=<Request [b'POST']>
2025-11-13 22:31:30.198 | DEBUG | httpcore._trace:atrace:87 - send_request_headers.complete
2025-11-13 22:31:30.198 | DEBUG | httpcore._trace:atrace:87 - send_request_body.started request=<Request [b'POST']>
2025-11-13 22:31:30.198 | DEBUG | httpcore._trace:atrace:87 - send_request_body.complete
2025-11-13 22:31:30.198 | DEBUG | httpcore._trace:atrace:87 - receive_response_headers.started request=<Request [b'POST']>
2025-11-13 22:31:30.465 | DEBUG | httpcore._trace:atrace:87 - receive_response_headers.complete return_value=(b'HTTP/1.1', 404, b'Not Found', [(b'Date', b'Thu, 13 Nov 2025 22:31:30 GMT'), (b'Content-Type', b'text/plain; charset=utf-8'), (b'Content-Length', b'27'), (b'Server', b'AtlassianEdge'), (b'Cf-Ray', b'99e1b83dccc25ee3-PDX'), (b'Cf-Cache-Status', b'DYNAMIC'), (b'Cache-Control', b'no-store, max-age=0'), (b'Vary', b'Accept-Encoding'), (b'Ge-Edge-Trusted-Cloudflare-Proxy', b'bWNwLWNsb3VkZmxhcmUK'), (b'X-Content-Type-Options', b'nosniff'), (b'X-Xss-Protection', b'1; mode=block'), (b'Atl-Traceid', b'f03cb8624ac240ba88dd117faa1679a3'), (b'Atl-Request-Id', b'f03cb862-4ac2-40ba-88dd-117faa1679a3'), (b'Strict-Transport-Security', b'max-age=63072000; preload'), (b'Report-To', b'{"endpoints": [{"url": "https://dz8aopenkvv6s.cloudfront.net"}], "group": "endpoint-1", "include_subdomains": true, "max_age": 600}'), (b'Nel', b'{"failure_fraction": 0.001, "include_subdomains": true, "max_age": 600, "report_to": "endpoint-1"}'), (b'Server-Timing', b'atl-edge;dur=238,atl-edge-internal;dur=6,atl-edge-upstream;dur=236,atl-edge-pop;desc="aws-us-west-2"')])
2025-11-13 22:31:30.465 | INFO | httpx._client:_send_single_request:1740 - HTTP Request: POST https://mcp.atlassian.com/v1/sse "HTTP/1.1 404 Not Found"
2025-11-13 22:31:30.465 | DEBUG | httpcore._trace:atrace:87 - response_closed.started
2025-11-13 22:31:30.465 | DEBUG | httpcore._trace:atrace:87 - response_closed.complete

[Jarrod Lowe]

Is this with OpenWebUI? I'm getting the same issue.

The OAuth flow completes fine (after making sure we had the allowlisted the callback domain (`https://*.OURDOMAIN/**` in the Atlassian Rovo MCP server config) - since yours is cloudfront, that could be your issue).

But I too just get a 404 when I try to actually use the MCP server post-oauth.

Did you get anywhere with this?

[travispowell]

Yes. This is with OpenWebUI. We did allowlist the callback domain in the MCP server configs. I have tried to figure this out for a bit, but we haven't been able to solve the issue yet. We have the same callback pattern whitelisted. Though it seems that the endpoint just doesn't work in the current state. I am hoping that the 0.6.37 release fixes the problem https://github.com/open-webui/open-webui/pull/19126 as this is mentioned

"- 🔧 MCP OAuth server metadata discovery now follows the correct specification order, ensuring proper authentication flow compliance. [#19244]"

[Jarrod Lowe]

I upgraded to 0.6.38 today, but I still have the same issue

[Simon Berleb]

Same behaviour on Open WebUI ‧ v0.6.39