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# Our World in Data (WebMCP preview): 16 WebMCP tools for AI agents

![](https://www.google.com/s2/favicons?domain=webmcp-tools.owid.pages.dev&sz=96)

Public services · webmcp-tools.owid.pages.dev

## Our World in Data (WebMCP preview)

Preview of Our World in Data charts. Agents can find charts and articles, select countries, set time ranges and download data.

[Open webmcp-tools.owid.pages.dev](https://webmcp-tools.owid.pages.dev/grapher/life-expectancy)

## Ask an agent to

-   Compare life expectancy in Japan and Nigeria since 1950
-   Download the data behind this chart
-   Find an article about child mortality

## 16 tools

-   `add_entities`
    
    Add countries or regions to the chart's current selection, keeping what is already shown. Use this for requests like 'also show Poland' or 'add the EU average'.
    
    entities: array
    
-   `download_chart_data`
    
    Give the user a download link for this chart's data as a CSV file, covering the entities and time range currently shown. Use when the user asks to download, export, or save the data.
    
    scope: string?
    
-   `find_article`
    
    Search Our World in Data's articles and written research. Use this whenever the user asks what OWID has written about a topic, or for an article, explainer or piece of writing — chart search does not return prose, so…
    
    query: string
    
-   `find_chart`
    
    Search Our World in Data's charts and return candidates as paths. Pass the countries or regions the user asked about so charts that lack them are flagged. Many OWID topics have several charts whose titles differ in…
    
    query: string, entities: array?
    
-   `get_chart_data`
    
    Read the actual data values behind the chart on this page, as CSV, for the entities and time range currently shown. ALWAYS call this before stating any number, trend, or comparison — do not answer from memory, because…
    
-   `get_chart_image_url`
    
    Get a URL for a static PNG or SVG image of the chart as it is currently configured, for embedding in a reply or sharing. This returns a link only — it does NOT navigate the page. Never navigate the tab to an image…
    
    format: string?
    
-   `get_chart_metadata`
    
    Read this chart's sources, units, and Our World in Data's own curated notes about how the data should and should not be interpreted. Call this before explaining what a chart means or why values differ between…
    
-   `get_chart_state`
    
    Read the current state of the chart on this page: its title, which entities (countries/regions) are selected, the time range shown, and which view is active. Call this before making a relative change such as adding an…
    
-   `list_chart_entities`
    
    List the countries and regions available on this chart. Use the optional query to filter, and always use the exact names returned here when selecting entities.
    
    query: string?
    
-   `open_article`
    
    Open an Our World in Data article. Use an \`article:\` path from find\_article. This navigates the page; call read\_page afterwards to read it.
    
    article: string
    
-   `open_chart`
    
    Open an Our World in Data chart, optionally pre-configured with specific countries, a time range and a tab. Pass the \`chart:\` path from find\_chart verbatim — it carries the parameters that pick which view of a…
    
    chart: string, entities: array?, startYear: number?, endYear: number?, tab: string?
    
-   `open_search`
    
    Open Our World in Data's search results page for a topic, so the user can browse everything we have on it. Use this only when the user wants to browse for themselves — if they asked a question, find\_chart or…
    
    query: string, resultType: string?
    
-   `read_page`
    
    Read the text of the Our World in Data page currently open — the article body, including its footnotes and references. ALWAYS call this before answering any question about what this page says, what a number on it is…
    
-   `select_entities`
    
    Set which countries or regions the chart shows, replacing the current selection. Use exact names from list\_chart\_entities. To add to what is already shown without removing anything, use add\_entities instead.
    
    entities: array
    
-   `set_chart_view`
    
    Switch which view of the data is shown — a line chart, the world map, the data table, or any other view this chart offers. Use this for 'show it as a line chart' or 'show me the map': many OWID charts open on the map…
    
    view: string
    
-   `set_time_range`
    
    Set the time range the chart displays, e.g. for 'since 1990' or 'between 2000 and 2020'. Omit either bound to leave it unchanged.
    
    startYear: number?, endYear: number?
    

Tools

16

Registered with

JavaScript

Scan finished

Oct 19, 2026

Tool names and descriptions are what webmcp-tools.owid.pages.dev/grapher/life-expectancy 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).
