io.github.ogasurfproject-jpg/hs-mcp-observatory
MCP Observatory: one read only walk over every https endpoint in the official registry
Public record of one read only walk over the official MCP registry: who answered, tools, who pays.
alive probed 2026-10-05 · HTTP 200
6tools
753tokens in Claude Opus 5.5
843tokens in Claude Code
0.4 %of a 200k context window
460o200k_base estimate
249 msto initialize
126 msto list tools
- Endpoint
- https://observatory.horizonshield.dev/mcp (streamable-http)
- Host
- observatory.horizonshield.dev
- Protocol
- 2025-11-25
- Reports itself as
- hs-mcp-observatory 0.1.1
- Capabilities
- tools
- Instructions
- 258 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/ogasurfproject-jpg/horizon-shield
- Website
- https://shield.the-horizons-innovation.com/verify-directory/survey/1/
- Registry
- active, updated 2026-09-04 · registry entry
- Reachable
- 5 of the last 5 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| mcp_observatory_measure_now | 127 | 28 % |
| mcp_observatory_lookup | 121 | 26 % |
| mcp_observatory_disclosure_guide | 60 | 13 % |
| mcp_observatory_summary | 53 | 12 % |
| mcp_observatory_state | 52 | 11 % |
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 00:43 | alive | 249 ms | 6 | 753 | 460 |
| 2026-10-04 10:06 | alive | 631 ms | 6 | 460 | |
| 2026-10-04 07:59 | alive | 521 ms | 6 | 460 | |
| 2026-10-03 20:39 | alive | 534 ms | 6 | 460 | |
| 2026-10-03 17:54 | alive | 327 ms | 6 | 460 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.ogasurfproject-jpg/hs-mcp-observatory)
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.