io.github.mrfentmen/otp-mcp
otp-mcp
Generate and verify time based one time passwords locally. No network and no key.
alive probed 2026-10-15
2tools
274tokens in Claude Opus 5.5
296tokens in Claude Code
0.1 %of a 200k context window
144o200k_base estimate
381 msto initialize
9 msto list tools
- Run it
- npx -y otp-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- otp-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/otp-mcp
- Registry
- active, updated 2026-09-21 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| generate_hotp | 78 | 54 % |
| generate_totp | 66 | 46 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.mrfentmen/otp-mcp)
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.