io.github.reesehammer/umbra-mcp
Umbra open SAR archive
Is the Umbra open SAR archive MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-11.
Search, preview, and measure Umbra open SAR from any MCP client. Umbra ships no search API.
alive probed 2026-11-15 · unchanged since 2026-11-11 · HTTP 200
- Endpoint
- https://api.umbra-py.space/mcp (streamable-http)
- Host
- api.umbra-py.space
- Protocol
- 2025-11-25
- Reports itself as
- umbra 0.1.4
- Capabilities
- prompts, resources, tools
- Instructions
- 1 899 characters
- Of a 1M window
- 2.2 % of a 1M context window
- Count
- 22k tokens in Claude Opus 5.5, exact, measured 2026-11-11. With the Claude Code prefix mcp__…__ on each tool name: 23k. The o200k_base estimate is 14k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/reesehammer/umbra-py
- Registry
- active, updated 2026-10-26 · registry entry
- Changes
- 5 recorded, reachable in 4 of them. A row is added when the result, the tool count or the cost changes.
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.62×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| find_repeat_sites | 3 464 | 2 139 | 15 % |
| search_catalog | 3 454 | 2 133 | 15 % |
| stack_stats | 2 371 | 1 464 | 11 % |
| download_asset | 1 914 | 1 182 | 9 % |
| watch_site | 1 569 | 969 | 7 % |
Compare this server with others.
More servers
Servers that mention umbra.
- UmbHost — Umbraco hosting storefront net.umbhost/umbhost-mcp · alive
- io.github.umbraco/Umbraco-CMS-MCP-Dev · needs env
- Umbra io.github.elberacasa/umbra · alive
- UmbHost Knowledgebase net.umbhost/umbhost-kb-mcp · alive
- Eclipse Umbra MCP io.github.CYAN-ECLIPSE-TECHNOLOGIES-LLC/umbra · not probed
- io.github.beepboop2025/umbra-proof · alive
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-11-11 11:37 | alive | 450 ms | 19 | 22k | 14k |
| 2026-11-10 11:53 | alive | 518 ms | 19 | 21k | 13k |
| 2026-10-30 10:41 | alive | 369 ms | 19 | 20k | 13k |
| 2026-10-27 09:29 | alive | 908 ms | 19 | 20k | 12k |
| 2026-10-16 06:29 | needs args |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- This server is in the heaviest 10 % of the registry. Its 5 most expensive tools are 57 % of the cost. Shorter descriptions, fewer optional parameters and fewer tools cut the cost. The command npx mcpcost --url <endpoint> --tools 50 lists every tool with its cost.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.