io.github.mrfentmen/adblock-filter-list-mcp

adblock-filter-list-mcp

Is the io.github.mrfentmen/adblock-filter-list-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-10.

Adblock Filter List MCP: read, check, lint, scaffold and run code.

alive probed 2026-11-15 · unchanged since 2026-11-10

20tools

4.2ktokens in Claude Opus 5.5

2.1 %of Claude's 200k window

1.7×the median server

200 msto initialize

32 msto list tools

Run it: npx -y @mrfentmen/adblock-filter-list-mcp@1.0.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: adblock-filter-list-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.4 % of a 1M context window
Count: 4.2k tokens in Claude Opus 5.5, exact, measured 2026-11-10. With the Claude Code prefix mcp__…__ on each tool name: 4.5k. The o200k_base estimate is 2.2k. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/awesome-servers
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, 1.87×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
rename_symbol	271	145	7 %
format_source	270	144	6 %
comment_lines	256	137	6 %
insert_snippet	255	136	6 %
uncomment_lines	253	135	6 %

These registry entries have the same tool names and the same schema sizes.

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

Servers that mention scaffold or filter.

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.