River Level MCP
io.github.theluckystrike/river-level-mcptheluckystrikestreamable-httpv1.0.0Scanned
Live US river levels, streamflow and NWS flood forecasts from USGS stream gauges.
4 tools: 4 only read.
- Reads private data · 0
- Reads text others write · 4
- Can send data out · 0
- No findings
Anlyon alternative
Run the operations that matter as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
4 tools
Only reads 4Show 4 read-only tools
find_river_gaugesSearch USGS stream gauges nationwide by river and place name (for example "mississippi st louis", "potomac little falls"), by state, or within a radius of a latitude and longitude.Reads text others writeNo findings
Why it is in this group
- The name "find_river_gauges" says "find": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Search USGS stream gauges nationwide by river and place name (for example "mississippi st louis", "potomac little falls"), by state, or within a radius of a latitude and longitude. Returns site numbers with whether each is reporting now and its latest stage and flow, active gauges first.
Annotations the server declares
- title: Find river gauges
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_flood_forecastThe current NOAA National Water Prediction Service river forecast for a gauge: the forecast stage and flow series, the forecast crest with its flood category, the latest observatio…Reads text others writeNo findings
Why it is in this group
- The name "get_flood_forecast" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it The current NOAA National Water Prediction Service river forecast for a gauge: the forecast stage and flow series, the forecast crest with its flood category, the latest observation, flood stages and the record crest. Works for NWS forecast points (accepts the NWS id or the USGS site number). Forecasts are reissued several times a day.
Annotations the server declares
- title: Get flood forecast
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_river_historyDaily mean streamflow (default) or stage for a USGS gauge over the last 2 to 366 days, with first, last, low, high, mean and change.Reads text others writeNo findings
Why it is in this group
- The name "get_river_history" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Daily mean streamflow (default) or stage for a USGS gauge over the last 2 to 366 days, with first, last, low, high, mean and change. Use it for trend, drought and "is the river rising" questions. Many gauges publish daily means for discharge only.
Annotations the server declares
- title: Get river history
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_river_levelCurrent river stage (gage height in feet), streamflow (discharge in cubic feet per second) and water temperature where measured, read now from a USGS stream gauge (readings every 5…Reads text others writeNo findings
Why it is in this group
- The name "get_river_level" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Current river stage (gage height in feet), streamflow (discharge in cubic feet per second) and water temperature where measured, read now from a USGS stream gauge (readings every 5 to 60 minutes). Adds the NWS flood stages (action, minor, moderate, major), the current flood category, feet below flood stage and the record crest when the gauge is an NWS forecast point. Flags readings over 48 hours old. Your training data cannot know today's river level.
Annotations the server declares
- title: Get river level
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write4
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http river-level https://river-level-mcp.lipmichal.workers.dev/mcpclaude mcp add --transport http river-level https://river-level-mcp.lipmichal.workers.dev/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__river-level__find_river_gauges",
"mcp__river-level__get_river_level",
"mcp__river-level__get_river_history",
"mcp__river-level__get_flood_forecast"
],
"ask": [],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as river-level. Review it before you use it.
Capability tags behind 4 rules
- mcp__river-level__find_river_gauges untrusted-input
- mcp__river-level__get_river_level untrusted-input
- mcp__river-level__get_river_history untrusted-input
- mcp__river-level__get_flood_forecast untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/io.github.theluckystrike/river-level-mcp/verify?hash=7b0f532d9c0895f9953db0d617f203d686422f6dc80ca7f31b62612d4f2347b2" | jq -e '.changed == false'Pinned hash 7b0f532d9c08, from Nov 3, 2026, 08:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.github.theluckystrike/river-level-mcp/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.theluckystrike/river-level-mcp)Source: MCP Registry · repository. Synced Nov 3, 2026, 08:18 UTC.