Use when you need a short, sourced explanation of a topic, place, organization, product or concept: returns the Wikipedia article's lead section as plain text plus title, short description, thumbnail and original image, page URL, Wikidata ID and last-modified time, in any Wikipedia language (redirects followed). Every response carries the CC BY-SA 4.0 license, credit line and source link required for reuse. Articles about individual people are not served (non-personal data only). Paid tool: x402 USDC on Base, $0.001 per successful call; call without payment to receive the PaymentRequired object.