io.github.elyngved/failmodes
mcp-typescript server on vercel
MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes
alive probed 2026-10-05 · HTTP 200
4tools
594tokens in Claude Opus 5.5
630tokens in Claude Code
0.3 %of a 200k context window
335o200k_base estimate
589 msto initialize
53 msto list tools
- Endpoint
- https://www.failmodes.com/api/mcp (streamable-http)
- Host
- www.failmodes.com
- Protocol
- 2025-11-25
- Reports itself as
- mcp-typescript server on vercel 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/elyngved/failmodes-mcp
- Registry
- active, updated 2026-07-05 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| search_failure_modes | 108 | 32 % |
| get_failure_mode | 100 | 30 % |
| list_modes | 77 | 23 % |
| list_categories | 50 | 15 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:42 | alive | 589 ms | 4 | 594 | 335 |
| 2026-10-05 00:34 | alive | 306 ms | 4 | 335 | |
| 2026-10-04 10:04 | alive | 2.0 s | 4 | 335 | |
| 2026-10-04 07:58 | alive | 2.0 s | 4 | 335 | |
| 2026-10-03 20:37 | alive | 2.0 s | 4 | 335 | |
| 2026-10-03 17:53 | alive | 1.4 s | 4 | 335 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.elyngved/failmodes)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.