io.github.arvicco/nabu-demo

Nabu

Is the Nabu MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-11.

Ancient-text research library: search, concordance, dictionaries, alignment over an open demo slice

alive probed 2026-11-15 · unchanged since 2026-11-11

14tools

17ktokens in Claude Opus 5.5

8.4 %of Claude's 200k window

6.7×the median server

3.1 sto initialize

23 msto list tools

Run it: docker run -i --rm ghcr.io/arvicco/nabu-demo:1.8.0 (stdio, probed in a container with the network off)
Host: ghcr.io
Reports itself as: nabu 1.8.0
Capabilities: tools
Instructions: none
Of a 1M window: 1.7 % of a 1M context window
Count: 17k tokens in Claude Opus 5.5, exact, measured 2026-11-11. With the Claude Code prefix mcp__…__ on each tool name: 17k. The o200k_base estimate is 11k. Counted again when the tool definitions change. Method.
Repository: https://github.com/arvicco/nabu
Website: https://arvicco.github.io/nabu/mcp/
Registry: active, updated 2026-11-10 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.59×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
nabu_search	5 189	3 257	31 %
nabu_show	1 427	896	8 %
nabu_define	1 337	839	8 %
nabu_parallels	1 185	744	7 %
nabu_cognates	1 185	744	7 %

Other registry entries on ghcr.io, the ones next to this name; all of them.

Servers that mention nabu.

Google Ads + Meta Ads + SEO/GEO MCP io.github.irinabuht12-oss/google-meta-ads-ga4-mcp · needs auth
ManaBuy MCP Server io.github.ManaBuyTeam/manabuy-mcp · alive
SynaBun io.github.danilokhury/synabun · alive

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.