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River Water Watch MCP server

Which MCP servers are River Water Watch's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-19

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Whose server it is
  • Registry namecom.riverwaterwatch/river-water-watchverified in the MCP registry

The registry name sits under riverwaterwatch.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-19
  • Stateanswerschecked 2026-10-19
  • Tools4
  • Server calls itselfriver-water-watch
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 110 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.

Once connected

  • Parameters are untyped or undescribed in 3 of 4 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 10, the first on 2026-10-19
  • INITE MCP score91 of 100answers 100 · definitions 71 · context 100 · connects 100
  • Answered100% of days10 of 10 daily checks
  • Median first answer162 ms
  • Space in an agent's context≈ 491 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsC · 71 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 3 of 4
  • Not saying whether it only reads or can destroy: 4 of 4

What an agent can do with it

  • not sure · check water levels for a booked river cruise
  • not sure · decide whether to book cruise dates
  • not sure · monitor forecasts for an upcoming sailing

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-19
  • get_monthly_odds

    Current 12-month cruise-disruption odds for one of Europe's main cruise rivers (chance a sailing day hits low water, or high water on the Seine). Refreshed daily from official sources.

  • get_live_gauges

    Today's official water-level readings (cm) at the cruise-critical gauges on the Rhine, Danube, Elbe and Seine, with each station's state and its percentile against thirty years.

  • score_sailing

    Score a specific river cruise: the chance a sailing departing on a given date meets low water (high water on the Seine) at its river's tightest stretch. Uses the live daily forecast where it reaches (~7 months) and the thirty-year weekly…

  • get_month_detail

    Why a given month behaves the way it does on one of the four rivers: the seasonal hydrology, the thirty-year frequency, and the last five years' outcomes for that month.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "river-water-watch": {
      "type": "http",
      "url": "https://www.riverwaterwatch.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http riverwaterwatch https://www.riverwaterwatch.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://www.riverwaterwatch.com/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.