io.github.mrfentmen/drinking-water-mcp

drinking-water-mcp

Is the io.github.mrfentmen/drinking-water-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-29.

US drinking water systems from EPA SDWIS: look up a public water system, its violations and its.

alive probed 2026-11-15 · unchanged since 2026-10-29

5tools

977tokens in Claude Opus 5.5

0.5 %of Claude's 200k window

0.4×the median server

201 msto initialize

6 msto list tools

Run it: npx -y @mrfentmen/drinking-water-mcp@1.0.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: drinking-water-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 977 tokens in Claude Opus 5.5, exact, measured 2026-10-29. With the Claude Code prefix mcp__…__ on each tool name: 1.0k. The o200k_base estimate is 546. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/awesome-servers
Registry: active, updated 2026-10-28 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.79×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
systems_by_type	265	148	27 %
search_systems	222	124	23 %
violations	174	97	18 %
enforcement	172	96	18 %
water_system	145	81	15 %

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

Servers that mention drinking.

io.github.cyanheads/epa-mcp-server · alive
Minairal io.github.crashedfox/minairal · alive
Passage Data — cited environmental limits io.github.kedu21-beep/passage-data · alive
CellarTracker io.github.slavins-co/cellartracker-mcp · alive
io.github.cyanheads/epa-drinking-water-mcp-server · crashed on start

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.