{"uid":"cap_Cm1nQolziAH-dChBQ2_fu","slug":"answerpool-significant-rule-tracker-f852d7e1","name":"AnswerPool Significant Rule Tracker","description":"AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.","url":"https://answerpool.io/v1/regs/significant","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","title":"SignificantIn","properties":{"limit":{"type":"integer","title":"Limit","default":25,"maximum":100,"minimum":1,"description":"Maximum significant documents returned, newest publication date first."},"since":{"anyOf":[{"type":"string","maxLength":40},{"type":"null"}],"title":"Since","default":null,"description":"publication_date >= this ISO date, e.g. 2026-06-01. Default: the last 90 days."},"types":{"type":"string","title":"Types","default":"rule,proposed_rule","description":"Comma-separated Federal Register document types: rule, proposed_rule, notice, presidential. An unlisted type is rejected. Default rule,proposed_rule."},"agency":{"anyOf":[{"type":"string","pattern":"^[a-z0-9-]+$","maxLength":120},{"type":"null"}],"title":"Agency","default":null,"description":"Federal Register agency slug from /v1/regs/agencies, e.g. securities-and-exchange-commission; an unknown slug fails the call. 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Each document includes title, document number, type, action, issuing agencies, publication date, effective date, comment close date, significance flag, abstract, docket IDs, regulation ID numbers, CFR references, topics, URL, and computed deadline flags (days_to_effective, days_to_comment_close, flags array such as 'effective_soon' or 'final_rule_pending_effect').","failureModes":["Invalid agency slug format returns a validation error","since date in wrong format returns a parse error","limit outside 1-100 range returns a validation error","No matching significant rules in the requested window returns count:0 and empty documents array","Upstream Federal Register API unavailability may cause stale or failed responses"],"whenToPreferThis":"Use this endpoint when you need only the high-signal subset of federal rulemaking — specifically E.O. 12866 significant rules that have undergone OIRA review — rather than scanning the entire Federal Register firehose. It is ideal for compliance teams, policy analysts, and regulatory monitoring agents who need to track economically major rules with upcoming deadlines. Prefer it over a general Federal Register feed when you want pre-filtered significance, deadline flags, and per-agency scoping in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:59:14.255Z","isFirstParty":false}