io.github.iamalisson/inquisitor
inquisitor
Is the io.github.iamalisson/inquisitor MCP server down? No. Installed with mcp<2, it started and listed its tools on 2026-11-02.
Hypothesis-driven problem solving for AI agents: probe, falsify, escalate.
needs mcp<2 probed 2026-11-14 · unchanged since 2026-11-02
A plain install of the package stops at the import below. These tool definitions are from a second install with mcp<2, started in a container with the network off, on 2026-11-02.
MCP error -32000: Connection closed ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp
- Run it
- uvx --with 'mcp<2' inquisitor-mcp@0.2.3 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Reports itself as
- inquisitor 1.30.0
- Capabilities
- experimental, prompts, resources, tools
- Repository
- https://github.com/iamalisson/inquisitor
- Registry
- active, updated 2026-08-06 · registry entry
- Changes
- 2 recorded, reachable in 0 of them. A row is added when the result, the tool count or the cost changes.
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| inquisitor_search | 211 | 26 % |
| inquisitor_phase_set | 146 | 18 % |
| inquisitor_trace | 114 | 14 % |
| inquisitor_scaffold | 107 | 13 % |
| inquisitor_verify | 95 | 12 % |
Compare this server with others, or with the servers that share its tool set.
Same tool set as 1 other server
These registry entries have the same tool names and the same schema sizes.
More servers
Other registry entries on pypi.org, the ones next to this name; all of them.
- Hyperlight io.github.hyperlight-dev/mcp-server-hyperlight · alive
- Aviation Accident Analysis MCP io.github.hzy9981/aviation-accident-analysis · crashed on start
- grad-agent io.github.i-ninte/grad-agent · alive
- Assurance io.github.i-ops-hq/assurance-mcp · alive
- CONTENTdm State Archives io.github.ianderso/contentdm-mcp · alive
- DPLA Catalog io.github.ianderso/dpla-catalog-mcp · alive
- FamilySearch io.github.ianderso/familysearch-mcp · alive
- German Archives (DDB; BW, NRW, Rhineland-Palatinate and Hesse registers) io.github.ianderso/german-archives-mcp · alive
Servers that mention inquisitor or hypothesis or escalate.
- io.github.1111111111111111111114oLvT2/inquisitor · needs mcp<2
- HANRIA agent mandate check ai.hanria/agent-mandate-check · alive
- ai.hanria/check · alive
- ai.spelunking/hub · alive
- StructureClerk ca.structureclerk/mcp · alive
- Disco com.leap-labs/discovery-engine · alive
- io.github.physics-star-cat/databutler-stats · needs auth
- Hunter-Seeker io.hunter-seeker/hunter-seeker · not found
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-11-02 08:20 | needs mcp<2 | 1.7 s | 7 | 1.6k | 819 |
| 2026-10-19 06:52 | crashed on start |
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
- The package imports FastMCP from mcp.server.fastmcp. mcp 2.0, the Python SDK of 28 July 2026, renamed FastMCP to MCPServer, and the package asks for mcp with no upper bound, so a plain install (uvx, pip) gets mcp 2.x and the server stops at the import. Installed with mcp<2, it starts and lists its tools. The fix for the publisher: pin mcp<2 in the dependencies, for example mcp>=1.2,<2, and publish a new version, or move to MCPServer as the SDK's migration guide says. Until then, run it with uvx --with 'mcp<2'.
The cause and the fix, with the code before and after: ModuleNotFoundError: No module named 'mcp.server.fastmcp'