Koskamo

Fail Modes MCP

Provides tools to search, retrieve, and list AI system failure modes from the Fail Modes taxonomy, supporting categories like factuality, alignment, and planning.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Fail Modes MCP logo, by elyngvedCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by elyngved
MCP endpoint (Streamable HTTP)
https://www.failmodes.com/api/mcp
Vendor documentation

What its tools do

4 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (4)

4 of 4 have a description · 0 of 4 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Search failure modes by symptom text or keyword
  • Retrieve full structured records for specific failure modes
  • List taxonomy categories with descriptions and counts
  • List all modes filtered by category ID

Source and maintenance

Community listingRegistry 0.1.0
mcp-registry: io.github.elyngved/failmodes@0.1.0Source repository
Maintenance checked

Protocol and capabilities

Server
mcp-typescript server on vercel 0.1.0
MCP protocol negotiated in check
2025-11-25
Tools
4 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Tools

4 advertised

search_failure_modes
Advertised by the server during the last successful anonymous check.

Search the Fail Modes taxonomy by symptom text or keyword phrase. Returns ranked matches with id, name, category, and matched context.

search_failure_modes input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "symptom"
  ],
  "properties": {
    "symptom": {
      "type": "string",
      "minLength": 1,
      "description": "Symptom phrase or keyword to search for, e.g. 'made up a citation' or 'refused to help after pushback'"
    }
  }
}
get_failure_mode
Advertised by the server during the last successful anonymous check.

Retrieve the full structured record for a single failure mode by its ID slug (e.g. 'citation-hallucination', 'sycophancy').

get_failure_mode input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "minLength": 1,
      "description": "The failure mode ID slug, e.g. 'citation-hallucination'"
    }
  }
}
list_categories
Advertised by the server during the last successful anonymous check.

List all taxonomy categories with their IDs, names, descriptions, and mode counts.

list_categories input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
list_modes
Advertised by the server during the last successful anonymous check.

List failure modes, optionally filtered to a single category by category ID.

list_modes input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "category": {
      "type": "string",
      "description": "Optional category ID to filter by, e.g. 'factuality'. Omit to list all modes."
    }
  }
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
495 ms
95th percentile latency
495 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 495 ms · metadata changed · 4 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http fail-modes-mcp https://www.failmodes.com/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add fail-modes-mcp --url https://www.failmodes.com/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable fail-modes-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "fail-modes-mcp": {
      "url": "https://www.failmodes.com/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "fail-modes-mcp": {
      "type": "streamableHttp",
      "url": "https://www.failmodes.com/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start fail-modes-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "fail-modes-mcp": {
      "type": "http",
      "url": "https://www.failmodes.com/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http fail-modes-mcp https://www.failmodes.com/api/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://www.failmodes.com/api/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "fail-modes-mcp": {
      "serverUrl": "https://www.failmodes.com/api/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Fail Modes MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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