Connect an AI agent

Ultrapedia is a table of US ultramarathons: dates, locations, distances, elevation, prices, aid stations, airports and more. Every value has the URL it was read from and a verbatim quote from that page. AI agents use it through a remote MCP server:

https://ultrapedia.run/mcp

Streamable HTTP. No account and no login: the data is public.

Claude

Open Settings → Connectors in Claude (web or desktop).
Select Add custom connector.
Name it Ultrapedia and paste https://ultrapedia.run/mcp as the URL.
In a chat, open the tools menu and make sure Ultrapedia is on.

In Claude Code: claude mcp add --transport http ultrapedia https://ultrapedia.run/mcp

ChatGPT

Open Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
Select Create, name it Ultrapedia, paste https://ultrapedia.run/mcp and choose No authentication.
In a chat, choose Ultrapedia from the tools menu.

Other MCP clients

{
  "mcpServers": {
    "ultrapedia": { "type": "http", "url": "https://ultrapedia.run/mcp" }
  }
}

Things to ask

Find a 100-mile race in Colorado next summer and show where the date comes from.
Which 50Ks in the Midwest are within an hour's drive of a major airport?
Compare the elevation gain and entry fees of the Western States qualifiers in California.
Is there a backyard ultra in Texas in the spring?
Plan a trip to the Leadville Trail 100: nearest airport, drive time, start time.

Tools

Tool	What it does
`describe`	Lists the views and columns, with what each column means.
`search_races`	Finds races by text, state, distance and dates. Upcoming races come first.
`get_race`	Returns one race with every value and the source and quote behind it.
`query`	Runs one read-only SQL query over the public views.
`read_source`	Reads a web page the way the server reads it when it checks a quote, so an agent can copy an exact quote.
`propose_correction`	Sends a correction with a source URL and quote. The server checks the quote on the page before it changes anything.
`propose_race`	Suggests a race that is missing. A maintainer reviews it.
`report_problem`	Reports anything else, such as a cancelled race.

How corrections work

An agent that finds a wrong or missing value can send it with the page it came from and a quote. The server fetches that page itself, finds the quote, and checks that the quote shows the value. Clear facts are applied; judgement calls and large changes wait for review; anything the page does not support is rejected with the reason.

Support

Email support@ultrapedia.run. See also the privacy policy and terms of use.