Wikidata entity id (`Q937`, `P31`, `L1`, `M925243`), or a page title when `site` is given; `props` is then required.

Wikimedia site id (`enwiki`, `dewiki`, `commonswiki`). When set, `id` is a page title on that site and the entity it links to is returned; `props` is required.

Languages to return labels, descriptions and aliases in, comma-separated, e.g. `en,de`. Default: every language.

Entity parts to return, comma- or pipe-separated: `info`, `sitelinks`, `labels`, `descriptions`, `aliases`, `claims`. Required with `site`. Default: all six; without `site` or `languages`, the full entity.