MaxPreps

National high-school sports database (CBS Sports). No auth, no API key, no browser bridge — plain curl from anywhere, no signed-in tab.

Pages are Next.js SSR: every public page has a companion JSON route at /_next/data/<buildId>/<path>.json. scripts/mpx.mjs resolves the buildId, fetches, and decodes.

# scripts/mpx.mjs sits next to this SKILL.md — point M at it.
# Standalone install: M=~/.claude/skills/maxpreps/scripts/mpx.mjs
# Shipped with maxpreps-mcp: M=<plugin-root>/skills/maxpreps/scripts/mpx.mjs
M=~/.claude/skills/maxpreps/scripts/mpx.mjs

node "$M" search "myers park"
node "$M" schedule nc/charlotte/myers-park-mustangs/football/25-26/schedule

mpx.mjs <kind> [path] — path is the site path without leading/trailing slashes. With no path it decodes a payload on stdin. Kinds:

• search "<query>" — schools + athletes (start here)
• teams <school-or-team-path> — every team path the school publishes
• schedule — games with scores, result, home/away (decodes the positional array)
• roster — players with jersey, position, height, class (decodes the positional array)
• stats — team stat leaders · team — season info, record, standings, rankings
• rankings — ranked leaderboard for a sport (see path note below)
• teamrankings / standings — one team's ranks; its conference table
• statcats / statleaders — stat leaderboard index; one board's ranked athletes
• school — school profile + nearby schools · athlete — one athlete's career
• raw — undecoded pageProps, for anything without a dedicated kind
• buildid — print the cached build id

Flags: --all keep isDeleted rows · --raw emit undecoded pageProps · --fresh (buildid) bypass cache.

Resolve before you fetch

Don't guess paths — two lookups, both cheap:

# 1. school -> canonicalUrl
node "$M" search "mater dei" | jq -r '.schools[] | "\(.name) (\(.city), \(.state))  \(.canonicalUrl)"'

# 2. school path -> real team paths
node "$M" teams ca/santa-ana/mater-dei-monarchs | jq -r '.[] | "\(.path)  [\(.gender) \(.sport) \(.level)]"'

Team path grammar is <sport>[/girls][/jv|/freshman][/<yy-yy>]/<tab>, but the segments are not predictable — the default gender varies by sport (golf/girls + golf/spring, field-hockey is Girls with no gender segment). Always take paths from teams.

Tabs: schedule, roster, stats, rankings, standings. Omit the tab for the team home page.

Leaderboards live on their own path: [<st>/]<sport>[/<season>]/rankings/<page> — the trailing page number is required (omitting it 404s) and each page holds 25 teams.

Seasons

Current season = no year segment. Prior seasons insert <yy-yy> before the tab: .../football/25-26/schedule. Roughly 20 years of history; mpx teams <team-path> lists every season with its year, or read .seasons from mpx team <team-path>.

Gotchas

• buildId rotates on every deploy. mpx caches it for 6h and silently re-resolves on a 404, so this is handled — but a hand-rolled curl against a stale id 404s. Use the script, or node "$M" buildid first.
• An out-of-season team looks broken. Before opening day the current season has an empty roster and no results. That is correct data, not a failure — check the prior season (25-26) before reporting nothing.
• isDeleted rows are real and numerous. The 25-26 Myers Park football roster carries 87 entries, 63 of which the site renders; the rest are soft-deleted duplicates. mpx filters them by default (matching the site) — --all keeps them. Same for contests.
• resultString is winner-first, not team-first. A loss reads "L 20-13" even though the team scored 13. For team-vs-opponent use the decoded teamScore / opponentScore fields, which mpx orients correctly.
• homeAwayType: 0 = home, 1 = away, 2 = neutral site (decoded to homeAway; any other value → unknown).
• classYear is a number: 9–12, decoded to classYearLabel (Fr./So./Jr./Sr.).
• Statewide scoreboards are not in the JSON. /<st>/<sport>/scores/ returns only page chrome — the game list is hydrated by a route that never fires server-side. Get scores per-team from schedule instead; don't claim a state had no games.
• Search is strict — "myers park high" returns zero, "myers park" returns the school. Drop qualifiers and retry before concluding a school is absent.

Read-only and low-volume by design; there is no write path. See references/recipes.md for field shapes, the positional key maps, and ready-to-run jq.

For the same data as typed MCP tools — usable from claude.ai or any client without this CLI — see maxpreps-mcp, which ships this skill.