io.github.mrfentmen/waterdata-mcp

waterdata-mcp

Is the io.github.mrfentmen/waterdata-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-09.

USGS Water Services: gauge metadata, live readings, daily values and statewide gauge search.

alive probed 2026-11-14 · unchanged since 2026-11-09

6tools

1.1ktokens in Claude Opus 5.5

0.5 %of Claude's 200k window

0.4×the median server

298 msto initialize

7 msto list tools

Run it: npx -y waterdata-mcp@1.0.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: waterdata-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.1 % of a 1M context window
Count: 1.1k tokens in Claude Opus 5.5, exact, measured 2026-11-02. With the Claude Code prefix mcp__…__ on each tool name: 1.1k. The o200k_base estimate is 594. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/awesome-servers
Registry: active, updated 2026-11-08 · 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
readings_over_time	208	116	20 %
daily_values	204	114	19 %
find_sites_in_state	195	109	18 %
latest_reading	172	96	16 %
site_info	152	85	14 %

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

Servers that mention statewide or metadata.

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.