dev.numberrank/numberrank
numberRank
Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth.
alive probed 2026-10-05 · HTTP 200
2tools
288tokens in Claude Opus 5.5
306tokens in Claude Code
0.1 %of a 200k context window
167o200k_base estimate
270 msto initialize
44 msto list tools
- Endpoint
- https://numberrank.dev/mcp (streamable-http)
- Host
- numberrank.dev
- Protocol
- 2025-11-25
- Reports itself as
- numberrank 1.0.0
- Capabilities
- tools
- Instructions
- 132 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://numberrank.dev
- Registry
- active, updated 2026-09-16 · registry entry
- Reachable
- 5 of the last 5 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| check_number | 109 | 65 % |
| directory | 58 | 35 % |
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 00:24 | alive | 270 ms | 2 | 288 | 167 |
| 2026-10-04 10:00 | alive | 981 ms | 2 | 167 | |
| 2026-10-04 07:53 | alive | 1.5 s | 2 | 167 | |
| 2026-10-03 20:33 | alive | 1.2 s | 2 | 167 | |
| 2026-10-03 17:50 | alive | 522 ms | 2 | 167 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.numberrank/numberrank)
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.