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  1. Servers
  2. usgs-water-mcp-server

usgs-water-mcp-server

io.github.cyanheads/usgs-water-mcp-server

Query real-time and historical USGS water data from ~8,000 stream gages and groundwater wells.

DatabasesInfrastructureProductivity

Findings

  • water_get_readings · inputSchema.properties.period.pattern

    "^P(?!$)(\\d+Y)?(\\d+M)?(\\d+W)?(\\d+D)?(T(?=\\d)(\\d+H)?(\\d+M)?(\\d+(\\.\\d+)?S)?)?$": lookaround ((?=, (?!, (?<=, (?<!) is not RE2-compatible

Tools (7)

Check history

updated 8h ago·validator v0.2.0·re-checked weekly

DateGradeErrorsWarnings
2026-08-17D10
2026-08-10D10
2026-08-03D10
2026-07-27D10
2026-07-20D10
2026-07-08A00

Graded by connecting to the live server and validating every tool schema. Grades re-run on every sync. Findings and grades are never editable by the publisher.

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Grade
D

Has a schema error a strict client can reject.

graded 2026-08-17

  • InteropD
  • Agent ergonomicsA
  • SafetyA

How grading works

Install

Graded D. Review the findings before installing.

Claude Code (remote)

claude mcp add --transport http io-github-cyanheads-usgs-water-mcp-server https://usgs-water.caseyjhand.com/mcp

Endpoint (streamable HTTP)

https://usgs-water.caseyjhand.com/mcp

npm (stdio)

npx -y @cyanheads/usgs-water-mcp-server

Verify it yourself

npx tirekick check https://usgs-water.caseyjhand.com/mcp
Links
  • @cyanheads/usgs-water-mcp-server on npm
  • MCP registry entry
  • Your server? Claim this listing