Failmodes

MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

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Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "failmodes": {
      "command": "npx",
      "args": [
        "-y",
        "failmodes-mcp"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

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:

Terminal

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):

config.json

{
  "mcpServers": {
    "failmodes": {
      "command": "npx",
      "args": ["-y", "failmodes-mcp"]
    }
  }
}

Cursor / VS Code

Add to your MCP settings file:

config.json

{
  "mcpServers": {
    "failmodes": {
      "command": "npx",
      "args": ["-y", "failmodes-mcp"]
    }
  }
}

Remote (no install required)

A hosted Streamable HTTP version is also available — no npm package needed:

config.json

{
  "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.).

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

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Reviews

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Frequently Asked Questions about Failmodes

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "failmodes": { "command": "npx", "args": ["-y", "failmodes"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Failmodes →Install in Claude Desktop Install in Cursor Install in VS Code

Documentation Overview

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:

Terminal

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):

config.json

{
  "mcpServers": {
    "failmodes": {
      "command": "npx",
      "args": ["-y", "failmodes-mcp"]
    }
  }
}

Cursor / VS Code

Add to your MCP settings file:

config.json

{
  "mcpServers": {
    "failmodes": {
      "command": "npx",
      "args": ["-y", "failmodes-mcp"]
    }
  }
}

Remote (no install required)

A hosted Streamable HTTP version is also available — no npm package needed:

config.json

{
  "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.).

License

MIT

Failmodes

Quick Install

Client Config & Setup

Documentation Overview

failmodes-mcp

Tools

Quick Start

Configuration

Claude Desktop

Cursor / VS Code

Remote (no install required)

How It Works

Links

License

Related MCP Servers

Reviews

Frequently Asked Questions about Failmodes

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

Explore more

Failmodes

Quick Install

Client Config & Setup

Documentation Overview

failmodes-mcp

Tools

Quick Start

Configuration

Claude Desktop

Cursor / VS Code

Remote (no install required)

How It Works

Links

License

Related MCP Servers

Reviews

Frequently Asked Questions about Failmodes

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

Explore more