# AnswerPool Federal Register Rules Search

> AnswerPool Federal Register Rules 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).

Search and retrieve recent U.S. federal regulatory documents (rules, proposed rules, notices) from the Federal Register, filtered by agency, topic, date range, and significance

## Facts

- Endpoint: POST https://answerpool.io/v1/regs/rules
- 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-rules-search-82219719
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_81bZhylTfyfkThD4Dg2P3

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-rules-search-82219719 -d '<json body>'
```

Example prompt: Find me the latest significant proposed rules from the SEC published in the last 30 days — I need the title, abstract, comment deadline, and docket number for each one.

## When to prefer this

Choose this endpoint when you need machine-readable, structured federal regulatory intelligence — especially for compliance monitoring, regulatory tracking, or policy research — rather than scraping federalregister.gov directly. It is ideal for AI agents that need to filter by agency, significance level, or topic keyword and receive clean, schema-validated output with comment deadlines and CFR references pre-parsed. Prefer it over general web search when you need reliable structured data with provenance and consistent schema.

## Known failure modes

- Invalid agency slug returns empty results or 400 error
- Date strings in wrong format may cause 422 validation error
- Very broad term with no results returns count 0 and empty documents array
- Limit out of range (below 1 or above 100) causes validation error
- Payment not provided or insufficient USDC triggers 402 Payment Required response

## 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 an as_of timestamp, total matching document count, and an array of regulatory documents each with: document number, title, type (rule/proposed rule/notice), action description, publishing agencies, publication date, effective date, comment close date, significance flag, abstract, docket IDs, regulation ID numbers, CFR references, topic tags, Federal Register URL, status flags (e.g. 'significant', 'comments_close_soon'), and days until comment close or effective date.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-08-30T18:00:00Z",
  "count": 1,
  "documents": [
   {
    "url": "https://www.federalregister.gov/documents/2026/08/21/2026-15872",
    "type": "Proposed Rule",
    "flags": [
     "significant",
     "comments_close_soon"
    ],
    "title": "Regulation Crypto Assets",
    "action": "Proposed rule",
    "topics": [
     "securities"
    ],
    "abstract": "The Commission proposes a framework for crypto asset securities...",
    "agencies": [
     "Securities and Exchange Commission"
    ],
    "docket_ids": [
     "S7-12-26"
    ],
    "significant": true,
    "effective_on": null,
    "cfr_references": [
     "17 CFR 230"
    ],
    "document_number": "2026-15872",
    "publication_date": "2026-08-21",
    "comments_close_on": "2026-10-20",
    "days_to_effective": null,
    "days_to_comment_close": 51,
    "regulation_id_numbers": [
     "3235-AN70"
    ]
   }
  ],
  "total_matching": 14
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-federal-register-rules-search-82219719/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)