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2s.io Federal Register Search
x402
2s.io Federal Register Search is a paid API for AI agents from 2s.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Search US Federal Register documents — rules, proposed rules, notices, and presidential documents — by keyword, type, agency, and date range
Price / call$0.001
Success—
StatusUnknown
How this service works
Search the US Federal Register — proposed rules, final rules, notices, and presidential documents. Filter by free-text term, document type (RULE/PRORULE/NOTICE/PRESDOCU), agency slug (e.g., epa, fda, sec), and publication date range. Returns document_number, type, title, abstract, FR citation, agencies, publication_date, effective_on, comments_close_on, htmlUrl, pdfUrl, rawTextUrl. Public-domain US government data. Real-time — published daily, past LLM training cutoff.
Output
Returns a list of Federal Register documents each containing: document_number, type (RULE/PRORULE/NOTICE/PRESDOCU), title, abstract, FR citation, list of agencies, publication_date, effective_on date, comments_close_on date, htmlUrl, pdfUrl, and rawTextUrl. Results are filtered by the provided query parameters and limited to the requested count (default 10, max 20).
Example use cases
Example prompt
“Search the Federal Register for proposed rules from the EPA about clean air standards published since 2024-01-01 — show me up to 10 results with their titles, abstracts, and links.”
Technical details
Endpoint
GEThttps://2s.io/api/law/federal-registerWhen to prefer
Use this endpoint when you need real-time, post-training-cutoff US federal regulatory data — proposed rules, final rules, agency notices, or presidential documents — especially when filtering by agency (e.g. epa, fda, sec) or document type matters. Prefer this over general web search when you need structured metadata like effective dates, comment deadlines, FR citations, and direct PDF links from official government sources.
Side effects
- Missing required 'q' parameter returns 400 Bad Request
- Invalid document type value (not RULE/PRORULE/NOTICE/PRESDOCU) returns 400
- Invalid agency slug format returns 400
- Invalid date format (not YYYY-MM-DD) returns 400
- No matching documents returns empty results array
- Limit exceeding 20 returns 400
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"q": "artificial intelligence",
"type": "RULE",
"limit": 10
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"_truncated": true,
"_originalSize": 11722
}Tags
x402
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