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MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes
About
MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes
Remote endpoints: streamable-http: https://www.failmodes.com/api/mcp
Security Report
This is a well-structured MCP server for accessing a public AI failure modes taxonomy with clean code patterns and appropriate security practices. The server makes unauthenticated HTTP requests to a trusted first-party domain (failmodes.com) to fetch public data, which is appropriate for its use case. No credentials, secrets, or dangerous patterns were detected. Minor code quality observations do not impact the security posture. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
4 files analyzed · 6 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
failmodes-mcp
MCP server for the Fail Modes taxonomy — a machine-readable knowledge base of AI system failure modes.
Provides four tools over 100+ canonical failure mode records spanning factuality, alignment, planning, code generation, instruction following, and more.
Tools
| Tool | Description |
|---|---|
search_failure_modes | Search by symptom text or keyword phrase. Returns ranked matches. |
get_failure_mode | Retrieve the full structured record for a failure mode by ID slug. |
list_categories | List all taxonomy categories with descriptions and mode counts. |
list_modes | List all modes, optionally filtered by category ID. |
Quick Start
No installation required — run directly with npx:
npx failmodes-mcp
Configuration
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):
{
"mcpServers": {
"failmodes": {
"command": "npx",
"args": ["-y", "failmodes-mcp"]
}
}
}
Cursor / VS Code
Add to your MCP settings file:
{
"mcpServers": {
"failmodes": {
"command": "npx",
"args": ["-y", "failmodes-mcp"]
}
}
}
Remote (no install required)
A hosted Streamable HTTP version is also available — no npm package needed:
{
"mcpServers": {
"failmodes": {
"url": "https://www.failmodes.com/api/mcp"
}
}
}
How It Works
On first tool call, the server fetches current taxonomy data from failmodes.com and caches it in memory for the duration of the session. Requires internet access.
The stdio transport makes this compatible with any MCP client that supports running local processes (Claude Desktop, Cursor, VS Code, etc.).
Links
- Taxonomy source: github.com/elyngved/failmodes-taxonomy
- Website: failmodes.com
- Remote MCP manifest: failmodes.com/server.json
License
MIT
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