Tutorial · 8 min · endpoints verified 2026-09-17

How to build an NCAAF conditions analytics tool

Attach kickoff weather to a real college game, preserve source timestamps, and keep missing venue geometry visible instead of manufacturing a forecast.

API coverage and endpoint overview: Explore the NCAAF API

Why this is hard

The join is the product

Weather is keyed by place and time; a college game is keyed by match id. A conditions tool is trustworthy only when that join is explicit and an unresolvable venue stays unavailable.

  • Kickoff time must remain UTC through the join.
  • Forecast and observed conditions are different evidence.
  • Venue geometry can be missing.
  • Weather should supplement, not overwrite, the game status.

Path 1 · recommended

Have your AI agent build it

Use MCP to find the game, then REST for match weather.

1. Connect the MCP server

Add the server in your MCP client and sign in with your Big Balls account. Your client registers itself and handles the token exchange — there is no key to copy.

MCP client configjson
{
  "mcpServers": {
    "bigballs-sports-data": {
      "url": "https://mcp.bigballsdata.com/mcp"
    }
  }
}

2. Tools your agent gets

  • get_matches

    Live, upcoming or historical matches for a sport or league.

  • get_coverage

    Machine-readable map of what we hold and what we do not.

3. Ask for what you want

Paste this at your agent. It is written to make the model check coverage before it designs anything, which is what stops it inventing a field we do not serve.

Prompttext
Find the NCAAF game I name and call its weather endpoint. Show temperature, wind, precipitation and the source timestamp when present. If unavailable_reason is returned, render that reason and do not substitute a nearby venue.

What the agent cannot reach

The MCP match tool does not include the dedicated weather response. Coverage depends on resolving the game venue to usable geometry.

Path 2 · hand-coded

Build it yourself

Resolve one game first, then request conditions by its stable match id.

  1. 01

    Find the college game

    Use the NCAAF league filter and retain kickoff_utc exactly as served.

    NCAAF match lookupbash
    curl -s "https://api.bigballsdata.com/v1/matches?sport=american_football&league=ncaaf&limit=20" \
  -H "x-api-key: $BBS_API_KEY"
  2. 02

    Request match conditions

    A valid match can still return an unavailable reason when the venue cannot be resolved. Treat that as a successful, honest empty state.

    Match weatherbash
    curl -s "https://api.bigballsdata.com/v1/matches/$MATCH_ID/weather" \
  -H "x-api-key: $BBS_API_KEY"
  3. 03

    Separate freshness from kickoff

    Display the condition timestamp independently from the scheduled kickoff so users can tell forecast age.

    Conditions view modeltypescript
    const view = {
  kickoff: match.kickoff_utc,
  measuredAt: weather.observed_at ?? weather.forecast_at ?? null,
  unavailableReason: response.meta?.unavailable_reason ?? null,
};

Reference

Every endpoint this tutorial uses

All on the gateway at api.bigballsdata.com. Verified against production on 2026-09-17.

MethodPathReturnsWhy you need itPlan
GET/v1/matches?sport=american_football&league=ncaafCollege game id, teams, kickoff and statusProvides the stable subject and time for the conditions request.Free
GET/v1/matches/:id/weatherKickoff conditions or a machine-readable unavailable reasonKeeps weather and its provenance attached to one match.Free

Pricing, honestly

This conditions join is Free

The weather call is not the paid boundary. Productive scale, history and other advanced capabilities can change the commercial fit, but an upgrade does not make unresolved venue geometry appear.

Free key

jsonjson
Match lookup and match weather response.

Solo

jsonjson
Higher request volume and the wider paid capability set; the weather shape is unchanged.
  • Unavailable venue geometry is a data gap, not a tier gate.
  • Cache finished-game observations.
  • Do not promise roof state from the unified NCAAF match row.
See the full plan ladder →

More tutorials

Other build guides

Known gaps

What still needs evidence

Conditions coverage should be measured before a broad product claim.

  • Report the share of NCAAF games with resolved venue geometry.
  • Distinguish forecast from observation in any aggregate study.
  • The unified NCAAF match row does not provide the NFL schedule route’s roof field.

Questions

Does every NCAAF game have weather?
No. The venue must resolve to usable geometry; otherwise render the machine-readable unavailable reason.
Does this include stadium roof state?
No. The NFL-specific schedule route carries roof, while the unified NCAAF match surface does not.
What timestamp should the UI show?
Show kickoff and the weather observation or forecast timestamp separately so freshness is visible.

Related APIs

Other APIs you can build with:

NCAAF API: FBS/FCS Scores & OddsAmerican Football APINFL API: Play-by-Play & Stats

Stats reference

NFL Player Stats API

Build the conditions panel

Use one real match id and make missing geometry as visible as the weather itself.