A
Assay MCP Server
@modelcontextprotocol/server-filesystem
Policy-enforcing MCP proxy with portable evidence output.
2 open CVEs
MIT license
Actively maintained
Last commit 0d ago
Works with most clients
Transport: stdio, sse, http
5 tools · ~118 tok
Grade A · 0.1% of 200K ctx
MCPpedia last refreshed this data
Assay MCP Server is an MCP server that policy-enforcing MCP proxy with portable evidence output. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 86/100 on MCPpedia's security, maintenance and efficiency rubric.
Step 1
Install in your client
Config is the same across clients - only the file and path differ.
CD
Supported in Claude Desktopstdio, sse, http · Node 18+
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io-github-rul1an-assay": {
"args": [
"-y",
"@modelcontextprotocol/server-filesystem"
],
"command": "npx"
}
}
}Are you the author?
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What Assay MCP Server does
Policy-enforcing MCP proxy with portable evidence output.
Test This Server
Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.
npx -y '@modelcontextprotocol/server-filesystem' 2>&1 | head -1 && echo "✓ Server started successfully"
After testing, let us know if it worked:
Scored, not listed
Why this score
Five weighted categories - click any category to see the underlying evidence.
Score breakdown
86/100across 5 weighted dimensions
0255075100
23
18
20
15
10
−14
Security
Maintenance
Efficiency
Documentation
Compatibility
Categoriesclick a row to see evidence
Security
OSV.dev2 open
CVE-2025-53110high
@modelcontextprotocol/server-filesystem vulnerability allows for path validation bypass via colliding path prefix
Versions of Filesystem prior to 0.6.3 & 2025.7.1 could allow access to unintended files in cases where the prefix matches an allowed directory. Users are advised to upgrade to 2025.7.1 to resolve the issue. Thank you to Elad Beber (Cymulate) for reporting these issues.
Affected:
>= 0source →CVE-2025-53109high
@modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling
Versions of Filesystem prior to 0.6.3 & 2025.7.1 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 2025.7.1 to resolve. Thank you to Elad Beber (Cymulate) for reporting these issues.
Affected:
>= 0source →Inventory
Tools (5)
Click any tool to inspect its schema.
~118 tokens total
Community
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Frequently Asked Questions
- Is Assay MCP Server safe to use?
- Assay MCP Server has 2 known CVEs tracked by MCPpedia. You can verify these on OSV.dev by searching for "@modelcontextprotocol/server-filesystem". Review the Security section above for details before installing.
- How do I install Assay MCP Server?
- Assay MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
- What can Assay MCP Server do?
- Assay MCP Server provides 5 tools: candidate, Quickstart, Ecosystem, Contributing, License. See the full tools list on the server page for descriptions and parameters.
- What AI clients work with Assay MCP Server?
- Assay MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
- Is Assay MCP Server actively maintained?
- Assay MCP Server is actively maintained - last commit was 0 days ago. It has 13 GitHub stars.
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Community
Discussion
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