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# RainViewer: 3 WebMCP tools for AI agents

![](https://www.google.com/s2/favicons?domain=rainviewer.com&sz=96)

Other · rainviewer.com

## RainViewer

Weather radar app and site. Agents can open the live radar map, a country radar page or the severe weather alerts map.

[Open rainviewer.com](https://www.rainviewer.com/)

## Ask an agent to

-   Open the weather radar for Germany
-   Show the global severe weather alerts map
-   Open the live rain radar map with the 2-hour forecast

## 3 tools

When we loaded rainviewer.com again on Oct 24, 2026, it registered these through `navigator.modelContext` or `provideContext()`, from earlier WebMCP drafts. Chrome 154 only offers `document.modelContext`, so Chrome’s own agent support does not see them.

-   `open_live_weather_radar_map`
    
    Open the interactive live weather radar map with global precipitation tiles and a 2-hour forecast.
    
-   `open_severe_weather_alerts`
    
    Open the global live severe weather alerts map (tornado, flood, fire, etc.).
    
-   `open_weather_radar_for_country`
    
    Open the RainViewer weather radar page for a specific country. Use when the user asks to see radar, rain, or precipitation for a named country.
    
    countrySlug: string
    

Tools

3

Registered with

JavaScript

Older API

navigator.modelContext

Tranco rank

#27,961

Scan finished

Oct 19, 2026

Tool names and descriptions are what www.rainviewer.com/ registered when we loaded it in Chrome 154 on Browser Use Cloud. The summary and the “ask an agent” lines are AI-written from them. To call the tools yourself, see [Chrome’s WebMCP docs](https://developer.chrome.com/docs/ai/webmcp). [How we found it](https://browser-use.com/webmcp#method).

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