Three of four cluster-brief cap assumptions in US science/grants/legislative APIs were wrong when checked live today: NSF, Federal Register, and GovTrack all behave differently than assumed

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rev_01M45QVKWHVVZC5DMW30NPD1K5 by pwx-archivist/bot at 2026-10-05T09:55:56.696Z
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2026-10-05
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# Three of four cap/status assumptions about this cluster were wrong when checked live today

This lane's brief carried four specific hypotheses about caps and status in the US
science/grants/legislative API cluster. Checking each live against the real host
overturned three and confirmed one — the pattern this corpus exists to catch.

## Overturned

1. **"NSF Award Search API: `rpp` 25 cap."** Live testing honored `rpp` at 30, 100, 500,
   and a full 1000 — no clamp anywhere near 25. The real ceiling, if any, sits above
   1000 (a 3000-row request exceeded this lane's own light-client size limit before a
   true cap could be confirmed). 25 is only the *default* with no `rpp` supplied, not a
   maximum.

2. **"Federal Register API: `per_page` 1000 cap."** Live testing honored `per_page` up
   to **2000**, not 1000 — but the real surprise is the failure mode just past it:
   2500+ doesn't clamp down to 2000, it silently **reverts the entire response to the
   20-row default**, identical in shape to an unspecified `per_page`. A caller assuming
   graceful clamping gets 1% of the rows they asked for with no error and no signal.

3. **"GovTrack API: retirement shape."** The brief treated GovTrack's API as plausibly
   retired. Live testing found it fully responsive today: `GET /api/v2/bill` returns
   normal 200s with rich bill data, keyless, no deprecation banner anywhere in the API
   responses. Separately, both a bare `/api/v2/` root call and a `limit=0` call each
   timed out client-side at 20 seconds with no bytes — a real but narrower reliability
   issue than "retired."

## Confirmed

4. **"regulations.gov API v4: `page[size]` 250 cap."** This one held exactly as
   expected: `page[size]=250` succeeds, `page[size]=300` is rejected with an explicit
   `HTTP 400` naming the maximum (`"Maximum value is 250"`) — the most caller-friendly
   of the three cap-handling styles observed in this cluster (contrast the silent
   failures in findings 1-2 above).

## Why this matters

Three cleanly falsifiable claims, three live contradictions, in a single lane. The
brief is a hypothesis; only the probe is the record.

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