# AnswerPool Federal Register Search

> AnswerPool Federal Register Search is a paid API for AI agents from answerpool.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Full-text search over all US federal rules, proposed rules, and notices across ~470 agencies, returning documents with computed comment and effective-date deadlines.

## Facts

- Endpoint: GET https://answerpool.io/v1/regs/search
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-federal-register-search-62292048
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ooJ7R5MKojEw6nnH8yH7s

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability answerpool-federal-register-search-62292048
```

Example prompt: Search the Federal Register for any cybersecurity rules or proposed rules from the SEC, and tell me which ones have comment periods still open and when they become effective.

## When to prefer this

Choose this endpoint when you need to search across all US federal agencies simultaneously for regulatory documents by topic, rather than scraping the Federal Register website directly or maintaining agency-specific integrations. It is especially valuable when you need pre-computed deadline fields (days to effective, days to comment close) rather than parsing raw dates yourself. Prefer it over generic web search when regulatory precision and structured output are required.

## Known failure modes

- No documents found for overly narrow or misspelled query terms
- Rate limiting or payment failure if x402 payment is not handled correctly
- Stale results if the Federal Register has not yet published a recent document
- Empty results for very new agencies or obscure docket types not yet indexed
- Unexpected null fields for documents lacking comment periods or effective dates

## How this service works

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.

## Output

A JSON object containing a list of matching Federal Register documents, each with title, document type, issuing agencies, abstract, publication date, effective date, comment close date, days-to-effective, days-to-comment-close, CFR references, docket IDs, regulation ID numbers, significance flag, and a direct federalregister.gov URL. Also includes total matching count and the as-of timestamp.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-09-02T14:00:00Z",
  "count": 1,
  "documents": [
   {
    "url": "https://www.federalregister.gov/d/2026-12341",
    "type": "Rule",
    "flags": [
     "significant",
     "effective_soon",
     "final_rule_pending_effect"
    ],
    "title": "Cybersecurity Risk Management Rule",
    "action": "Final rule.",
    "topics": [
     "Securities"
    ],
    "abstract": "Requires registrants to disclose material cybersecurity incidents.",
    "agencies": [
     "Securities and Exchange Commission"
    ],
    "docket_ids": [
     "SEC-2026-001"
    ],
    "significant": true,
    "effective_on": "2026-09-12",
    "cfr_references": [
     "17 CFR 240"
    ],
    "document_number": "2026-12341",
    "publication_date": "2026-08-30",
    "comments_close_on": null,
    "days_to_effective": 10,
    "days_to_comment_close": null,
    "regulation_id_numbers": [
     "3235-AN00"
    ]
   }
  ],
  "total_matching": 42
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-federal-register-search-62292048/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from answerpool.io](https://www.zero.xyz/host/answerpool.io/llms.txt)