Pull one Wayback Machine snapshot per year for any site using the CDX API

A developer explains how the Internet Archive's CDX server can return a single capture per year for a given website using one curl command with no API key. The collapse parameter groups results by the first four characters of each timestamp, so the year becomes the grouping key. A negative limit value retrieves the most recent captures instead of the earliest ones. Timestamps follow a YYYYMMDDhhmmss format in UTC, and the same approach can produce monthly or daily timelines. The author, who also sells a paid Apify Actor wrapping these endpoints, notes that heavy domain-wide queries may time out and should be rate-limited.