io.github.sadri-dridi/http-451
HTTP 451 unavailable-legal
Meaning of HTTP 451.
alive probed 2026-10-05 · HTTP 200
31tools
13ktokens in Claude Opus 5.5
13ktokens in Claude Code
6.5 %of a 200k context window
7.4ko200k_base estimate
65 msto initialize
22 msto list tools
- Endpoint
- https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-451/mcp (streamable-http)
- Host
- agent-observatory-sensor.nolimit-observatory.workers.dev
- Protocol
- 2025-03-26
- Reports itself as
- HTTP 451 unavailable-legal 3.0.0
- 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/sadri-dridi/named-mcp-utilities
- Registry
- active, updated 2026-09-09 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| agent-ads-index | 295 | 4 % |
| agent-tool-index | 277 | 4 % |
| people-search-index | 272 | 4 % |
| normalize-url | 240 | 3 % |
| citation | 240 | 3 % |
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 15:55 | alive | 65 ms | 31 | 13k | 7.4k |
| 2026-10-05 00:49 | alive | 24 ms | 31 | 7.4k | |
| 2026-10-04 10:08 | alive | 30 ms | 31 | 7.4k | |
| 2026-10-04 08:01 | alive | 14 ms | 31 | 7.4k | |
| 2026-10-03 20:41 | alive | 50 ms | 31 | 7.4k | |
| 2026-10-03 17:57 | alive | 96 ms | 31 | 7.4k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.sadri-dridi/http-451)
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.