Hey, thanks for the report.
I see you selected “Background Agent” as the bug location. If you mean the Cloud/Background Agent (the one used via web/GitHub/Slack), custom MCP servers aren’t supported there yet. The Background Agent runs in the cloud and can only see the built-in services (cursor-browser-extension, cursor-ide-browser). This is a known limitation. Here’s a similar thread requesting this feature: Background agent doesn’t call MCP.
If the issue is with regular Agent mode in the IDE (local), please share:
- What’s the status of the MCP servers in Cursor Settings > Tools & MCP, is it green/yellow/red?
- The Request ID of the chat where the agent doesn’t see the MCP tools (Cursor Settings > General > Privacy, turn off Privacy Mode before testing)
Let me know if this helps or if you want me to clarify anything.