com.nobleblocks/nobleblocks-mcp
nobleblocks
Search 340M+ academic papers — citation graphs, semantic similarity, and AI literature reviews.
alive probed 2026-10-12 · HTTP 200
3tools
1.1ktokens in Claude Opus 5.5
1.1ktokens in Claude Code
0.5 %of a 200k context window
603o200k_base estimate
2.3 sto initialize
233 msto list tools
- Endpoint
- https://mcp.nobleblocks.com/mcp (streamable-http)
- Host
- mcp.nobleblocks.com
- Protocol
- 2025-11-25
- Reports itself as
- nobleblocks 3.0.0
- Capabilities
- prompts, resources, tools
- Instructions
- 543 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-07. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/nobleblocks/nobleblocks-mcp
- Registry
- active, updated 2026-06-05 · registry entry
- Reachable
- 2 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| search_papers | 276 | 46 % |
| get_citation | 179 | 30 % |
| get_paper | 148 | 25 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-12 11:30 | alive | 2.9 s | 3 | 1.1k | 603 |
| 2026-10-07 11:03 | alive | 2.3 s | 3 | 1.1k | 603 |
| 2026-10-05 00:18 | timeout | ||||
| 2026-10-04 09:57 | timeout | ||||
| 2026-10-04 07:51 | timeout | ||||
| 2026-10-03 20:31 | timeout | ||||
| 2026-10-03 17:49 | timeout |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.nobleblocks/nobleblocks-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.