{"uid":"cap_OAZQBHEPzRArjsiomRqsM","slug":"2s-knowledge-delta-recent-events-by-topic-50230377","name":"2s Knowledge Delta — Recent Events by Topic","description":"The (most) everything API: 575+ pay-per-call endpoints for AI agents — ground-truth data, a full AI gateway, and agent infrastructure (storage, queues, watchers). USDC via x402, no signup, no API keys, and upto billing: pay actual usage, not the quote.","url":"https://2s.io/api/agent/knowledge-delta","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"since":{"type":"string","description":"Earliest date (YYYY-MM-DD)."},"topic":{"type":"string","description":"Free-text domain of interest (2-200 chars)."},"until":{"type":"string","description":"Latest date (YYYY-MM-DD); default today."},"maxEvents":{"type":"integer","description":"Max events to return (1-50); default 20."}}},"responseSchema":null,"example":{"request":{"since":"2024-01-01","topic":"artificial intelligence","until":"2024-01-31","maxEvents":10},"response":{"data":{"ok":true,"meta":{"rawHits":29},"items":[{"query":{"since":"2024-01-01","topic":"artificial intelligence","until":"2024-01-31","maxEvents":10},"events":[{"date":"2024-01-29","title":"Safe, Secure, and Trustworthy AI Development","source":"federal-register","summary":"Executive order directing the 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Give me up to 10 events through June 2026.","exampleUseCases":null,"resultDescription":"A JSON object containing an array of structured events, each with a date, title, summary, significance score (1-5), source label, and source URL. Also includes metadata about raw hits and which data sources were queried (e.g. federal-register, court-cases).","failureModes":["Topic string too short or too long (outside 2-200 chars) — returns validation error","Date range yields no matching events — returns empty items array with ok:true","Invalid date format (not YYYY-MM-DD) — returns parsing error","maxEvents out of range (0 or >50) — returns validation error","Upstream data sources temporarily unavailable — may return partial results or 5xx error"],"whenToPreferThis":"Use this endpoint when an AI agent needs structured, time-bounded summaries of real-world events on a specific topic — especially regulatory, legal, or policy domains. 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