io.github.flinker-app/ifc-mcp

IFC MCP

Is the IFC MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

Local IFC/BIM MCP server with IfcOpenShell Python in Pyodide and an IFC viewer.

alive probed 2026-11-14 · unchanged since 2026-10-30

5tools

2.7ktokens in Claude Opus 5.5

1.3 %of Claude's 200k window

1.1×the median server

452 msto initialize

10 msto list tools

Run it: npx -y ifc-mcp@0.2.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: ifc-mcp 0.2.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.3 % of a 1M context window
Count: 2.7k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 2.7k. The o200k_base estimate is 1.5k. Counted again when the tool definitions change. Method.
Repository: https://github.com/flinker-app/ifc-mcp
Registry: active, updated 2026-09-24 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.74×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
set-bcf-view	1 480	853	55 %
run-python	623	359	23 %
show-ifc-file	252	145	9 %
open-ifc-viewer	165	95	6 %
clear-ifc-viewer	160	92	6 %

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

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.