Wikimedia Commons

Wikipedia's whole front page for one calendar date in one language: the featured article with extract and image, the picture of the day, the most-read articles with view counts, and the In The News items.

Everything about one Commons file: its canonical title, description page URL, uploader and timestamp of the latest version, and direct URLs plus pixel dimensions, duration and byte size for the thumbnail, preview and original renditions.

A single integer counting one class of activity on a page - total edits, distinct editors, bot edits, anonymous edits, minor edits or reverted edits - plus a flag saying whether the server's counting limit was hit.

Historical events tied to one calendar day - selected anniversaries, births, deaths, general events and holidays - each with a year, a text summary and the linked Wikipedia pages with extracts and thumbnails.

The lightweight record for one wiki page: id, key, title, content model, licence, the latest revision id and timestamp, and an html_url pointing at the rendered page, with no article body.

The one-line short description of a page, the same string that appears under the title in the mobile apps and in search suggestions.

A segment of 20 revisions of one page, newest first, each with revision id, timestamp, editor, byte size, delta, comment and minor flag, plus older/newer links for paging.

The page metadata together with the fully rendered Parsoid HTML of the article in a JSON envelope, so templates, infoboxes and tables arrive already expanded.

Every other-language version of one page, each with its language code, autonym, localised title and full URL.

Every image, video and audio file used on one page, each with its title, media type, original and thumbnail URLs, dimensions, byte size and the structured artist, credit and licence fields from its Commons description.

The full raw wikitext of one wiki page plus its metadata: id, key, title, latest revision, content model and licence.

A time series of how many times one article was viewed, one data point per day or month, filtered by platform and by human-versus-bot traffic.

A time series of total pageviews for an entire wiki, one point per hour, day or month, split by platform and traffic type.

The thousand most viewed articles on one wiki for a given day or month, ranked, with each article's title, rank and view count.

One specific revision of a page: its wikitext as it stood at that moment, plus the editor, timestamp, comment, byte size, delta and the id of the revision it replaced.

The record for one revision without its content: page id and title, editor, timestamp, comment, byte size, delta, minor flag and a link to the HTML.

A structured diff between two revisions of the same page: an array of changed ranges with the old and new text, change type, line numbers and character offsets, plus both revisions' metadata.

Full-text search of Wikimedia Commons file and category pages, returning page id, key, title, a highlighted excerpt, the short description and a thumbnail URL for each hit.

Full-text search across the content of one wiki, returning page id, key, title, a highlighted excerpt, the short description and a thumbnail for each hit.

Pages whose titles start with the given prefix, each with id, key, title, short description and thumbnail - the typeahead index rather than a content search.