Does Filesystem (reference) work with Cursor?
Yes. Filesystem (reference) passed every step of our test in Cursor on Oct 13, 2026: it installed, connected, its tools were visible, and an agent used it to finish a real task.
Result
ResultPassed
Date testedOct 13, 2026
Plan tested onCursor Pro+
App version2026.10.12-d47ca18
Modelgpt-5.3-codex-low
Steps
- install OK
- connected OK
- tools visible OK
- agent task: write read back OKcreate a document with known content, then read it back
From our own harness run, not the maker’s claims. How we test.
What happened in this run
Install config we used
{
"mcpServers": {
"ref-filesystem": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-filesystem",
"/workspace/timmy/harness/sandbox/fsroot"
]
}
}
}Connection check
ref-filesystem: readyTools the app saw
14 tools in the app (protocol check found 14).
Agent task: write read back
- Tool calls, in order:
ref-filesystem:write_file,ref-filesystem:read_text_file
Raw details from our harness log for this run. Secrets redacted.
Set it up in Cursor
Copy-paste config for every app is on the Filesystem (reference) page. Not connecting? Cursor MCP troubleshooting.
Other apps we tested it in: Claude Code (passed) · Claude Desktop (passed) · ChatGPT (Codex) (passed).