Atlassian MCP stopped working, failing during OAuth flow

[Eugene Myasyshchev]

Hi, I started getting OAuth errors when using the MCP server from cursor (was working well just few days ago). Now getting error below when trying to authenticate:

The redirect URI is not allowed, the URL is not part of Atlassian allowlisted domains for registered MCP Clients. Redirect URI cursor://anysphere.cursor-mcp/oauth/user-Atlassian-MCP-Server/callback

Using it via cursor, have it configured like below:

"Atlassian-MCP-Server": {

    "url": "https://mcp.atlassian.com/v1/sse"

},

Is there anything missing on my end?

[Dr Valeri Colon (Connect Centric)]

@Eugene Myasyshchev This one’s on Atlassian, not you. They recently tightened the OAuth allowlist for the MCP server, and Cursor’s custom redirect URI isn’t currently included—so the flow fails even if it worked last week. There’s no client-side fix yet. The workaround is to use mcp-remote or wait for Atlassian to re-allow Cursor’s redirect.