National Park Service
FreeLiveLast verified 24 Sept 2026
US national park details, alerts, campgrounds, visitor centers, events and photos, keyed by park code.
Example request
curl -s 'https://developer.nps.gov/api/v1/parks?parkCode=acad' -H "X-Api-Key: $API_KEY"
Free tier, in plain English
Free key from a short sign-up form. The default cap is 1,000 requests an hour on a rolling window, after which the key is paused for an hour.