Best free filesystem MCP servers: tested agent tools and MCP servers
As of 2026-10-22, TestedMCP tested 8 filesystem MCP servers; 2 free servers scored 100/100.
Last tested 2026-10-22 · How we test
Free labels are assigned by hand as of 2026-10-22 and haven't yet been re-checked against vendor pricing pages.
Ranked free options
| Rank | Server | Free label | Score | Install | Handshake | Maintenance | Docs | License | Tools | Last tested | Install |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Desktop Commander repo | Free, no key | 100 | pass (20) | pass (30) | pass (25) | pass (15) | pass (10) | 26 | Last tested 2026-10-22 | npx -y @wonderwhy-er/desktop-commander |
| 2 | Excel repo | Free, no key (open source; verified from our run + license) | 100 | pass (20) | pass (30) | pass (25) | pass (15) | pass (10) | 46 | Last tested 2026-10-22 | npx -y excel-mcp-server |
| 3 | Filesystem (reference) repo | Free, no key | 93 | pass (20) | pass (30) | pass (25) | pass (15) | partial (3) | 14 | Last tested 2026-10-22 | npx -y @modelcontextprotocol/server-filesystem |
| 4 | Text Editor repo | Free, no key (open source; verified from our run + license) | 90 | pass (20) | pass (30) | partial (15) | pass (15) | pass (10) | 6 | Last tested 2026-10-22 | npx -y mcp-text-editor |
Notes on each server
1. Desktop Commander
MCP initialize + tools/list over stdio succeeded with no credentials; 26 tools listed in 3.7s. Repo pushed 0 days before test; 10,087 GitHub stars. MIT (OSI-approved).
2. Excel
MCP initialize + tools/list over stdio succeeded with no credentials; 46 tools listed in 10.4s. Repo pushed 0 days before test; 4,256 GitHub stars. MIT (OSI-approved).
3. Filesystem (reference)
MCP initialize + tools/list over stdio succeeded with no credentials; 14 tools listed in 11.0s. Repo pushed 2 days before test; 91,469 GitHub stars. License not machine-detected as OSI (SEE LICENSE IN LICENSE).
4. Text Editor
MCP initialize + tools/list over stdio succeeded with no credentials; 6 tools listed in 9.4s. Latest release published 39 days before test. MIT (OSI-approved).
Also tested (not ranked: pricing not yet verified)
- Pandoc: score 83, handshake pass, Last tested 2026-10-22
- PDF (MCP): score 70, handshake fail, Last tested 2026-10-22
- Filesystem (cyanheads): score 45, handshake fail, Last tested 2026-10-22
- Office Word: score 33, handshake fail, Last tested 2026-10-22
When to upgrade to a paid option
None needed for most users. No paid option is recommended here.
FAQ
What is the best free filesystem MCP server?
Desktop Commander ranks first with a TestedMCP score of 100/100 (tested 2026-10-22). Ties are broken by GitHub stars; affiliate status is never used.
Do I need an API key?
Desktop Commander: no key needed for the MCP handshake; Excel: no key needed for the MCP handshake; Filesystem (reference): no key needed for the MCP handshake; Text Editor: no key needed for the MCP handshake. A working handshake without a key doesn't mean the backing service is free.
What's the difference between free and free tier?
Free means open source with no paid service behind it. Free tier means the server is open source but the API behind it meters usage, and heavy use is paid.
Does TestedMCP get paid for rankings?
No. Rankings come only from our automated tests. Affiliate links appear only in the 'When to upgrade' section and never affect scores or order.