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usgswater

USGS Water MCP — wraps USGS National Water Information System (NWIS) REST services (free, no auth)

Registry
Updated
Apr 2, 2026

@pipeworx/mcp-usgswater

MCP server for USGS water and streamflow data

Tools

ToolDescription
get_currentGet current instantaneous streamflow and gage height for a USGS site
search_sitesFind active USGS stream-gage sites in a US state
get_dailyGet daily mean streamflow values for a site over a date range

Quickstart (Pipeworx Gateway)

curl -X POST https://gateway.pipeworx.io/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "get_current",
      "arguments": { "site_id": "01646500" }
    }
  }'

License

MIT

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