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Federal Register Search API
x402
Federal Register Search API is a paid API for AI agents from apiacre.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Search U.S. Federal Register documents by topic, agency, document type, and date, returning regulatory notices, rules, proposed rules, and presidential documents with links to official sources.
Price / call$0.02
Success—
StatusUnknown
How this service works
Search newest U.S. Federal Register document metadata by topic, agency, type, and publication date, returning bounded regulatory notices, rules, proposed rules, presidential documents, and links to FederalRegister.gov and official govinfo.gov PDFs.
Output
Returns structured metadata for matching Federal Register documents including document title, agency, document type (notice, rule, proposed rule, presidential document), publication date, abstract, and direct links to FederalRegister.gov pages and official GovInfo.gov PDFs. Results are bounded to the newest matching documents within the specified filters.
Example use cases
Compliance monitoring for regulated industry
“Find all final rules and notices published by the FDA in the last 60 days related to pharmaceutical manufacturing — I need the titles, document types, publication dates, and links to the official PDFs on GovInfo.”
Policy research on new executive orders
“Search the Federal Register for presidential documents published this month — specifically executive orders — and give me a summary of what was published with links to FederalRegister.gov.”
Legal research on proposed financial regulations
“Look up the newest proposed rules from the SEC and CFTC related to cryptocurrency or digital assets published in 2024, and return the document titles, agencies, dates, and links so I can review them.”
Technical details
Endpoint
POSThttps://apiacre.com/v1/research/federal-register-searchWhen to prefer
Choose this endpoint when you need structured, machine-readable metadata about U.S. Federal Register documents including regulatory notices, rules, proposed rules, or presidential documents, especially when you need direct links to official government sources. Prefer this over general web search when you need authoritative regulatory data filtered by agency, document type, or date, and when compliance, legal research, or policy monitoring is the goal.
Side effects
- No matching documents found for the given query or date range — returns empty result set
- Invalid document type or agency name causes filter to return no results
- Overly broad query with no filters may return truncated result set
- Federal Register upstream API unavailability causing timeout or error response
- Date range too narrow returning zero results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | — | |
| max_results | integer | |
| agency_slugs | array | |
| published_to | — | |
| document_types | array | |
| published_from | — |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"query": {
"term": "artificial intelligence",
"agencySlugs": [
"commerce-department"
],
"publishedTo": null,
"documentTypes": [
"NOTICE",
"PRORULE"
],
"publishedFrom": "2026-01-01"
},
"source": "https://www.federalregister.gov/api/v1/documents.json",
"documents": [
{
"type": "Notice",
"title": "Request for Information (RFI) on Modernizing the National Vulnerability Datab...",
"citation": "91 FR 52042",
"documentNumber": "2026-16371",
"publicationDate": "2026-08-12"
}
],
"disclaimer": "Public regulatory-document discovery for research only; verify the linked off...",
"description": "Documents matching 'artificial intelligence', published on or after 01/01/202...",
"limitations": [
"Results are newest-first and bounded by max_results; totalMatches may exceed ...",
"FederalRegister.gov is an unofficial informational display and does not repla...",
"Search results, abstracts, dates text, agency metadata, and significance flag..."
],
"retrievedAt": "2026-08-13T00:00:00Z",
"totalMatches": 12,
"documentation": "https://www.federalregister.gov/developers/documentation/api/v1",
"documentsReturned": 1,
"documentsTruncated": true
},
"meta": {
"cached": false,
"sources": [],
"warnings": [],
"duration_ms": 42,
"next_actions": []
},
"service": "research.federal-register-search",
"version": "1",
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"
}
}Tags
x402
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