{"name":"topic-trend-brief","description":"Topic trend brief API to check whether interest in a topic is rising: send a topic and window, get back Wikipedia pageview trend, recent news mention volume, Hacker News mention volume, and X/Twitter mention volume in one call. Built for agents asking 'is this topic trending' or 'rising topic' without polling four separate signal sources by hand. Composite: one call runs wikipedia-pageviews + news-search + hn-search + x-search in parallel and reports interest over time plus a rising/flat verdict. hn-search is the required leg; wikipedia-pageviews (needs a matching article title), news-search, and x-search (needs an X bearer token configured) degrade the brief instead of failing the call when their upstream can't answer. Use it as a topic trend API, rising-topic detector, or mention-volume tracker for research and market-scouting agents.","price":"$0.05","method":"POST","input_schema":{"properties":{"topic":{"type":"string","description":"The topic to check, e.g. 'agentic commerce' or a Wikipedia article title for best pageview matching. Max 300 chars."},"window":{"type":"string","description":"Lookback window: '7d', '30d', or '90d'. Default '30d'."}},"required":["topic"]},"input_example":{"topic":"Artificial intelligence","window":"30d"},"output_example":{"topic":"Artificial intelligence","window":"30d","rising":true,"signals":{"pageview_trend_pct":12.4,"pageview_total":850000,"news_mentions":20,"hn_mentions":14,"x_mentions":9},"pageviews":{"trend_pct":12.4,"total":850000},"news":{"returned":20},"hn":{"total_hits":14},"x":{"result_count":9},"signals_available":4,"composed_of":["hn-search","wikipedia-pageviews","news-search","x-search"],"components":[{"name":"hn-search","ok":true,"ms":300},{"name":"x-search","ok":false,"ms":20,"error":"Server misconfigured: missing X_BEARER_TOKEN"}],"degraded":true},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}