# US Federal Register Document Search

> US Federal Register Document Search is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-15).

Search and retrieve official US Federal Register documents (rules, proposals, warnings, presidential documents) by topic and date range

## Facts

- Endpoint: POST https://api.vextorium.com/v1/us-federal-register?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-federal-register-document-search-41c2bba7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j4osD0hN9TGGo9gcK8R9F

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 us-federal-register-document-search-41c2bba7 -d '<json body>'
```

Example prompt: Search the US Federal Register for the 20 most recent rules or proposals about artificial intelligence from the last 90 days, and give me the title, date, issuing agency, and a summary for each.

## When to prefer this

Use this endpoint when you need structured, machine-readable access to official US Federal Register content — rules, regulatory proposals, warnings, and presidential documents — searchable by topic and recency. It is ideal for compliance monitoring, regulatory research, policy tracking, and legal analysis workflows where sourcing from the authoritative US government record is required. Prefer this over general web search when you need clean structured data (title, agency, date, summary, link) rather than raw HTML, and when you specifically need to search within the Federal Register corpus rather than the broader web.

## Known failure modes

- No documents found for obscure or misspelled search terms — returns empty documents array with total_matches of 0
- Rate limiting or upstream Federal Register API unavailability may cause timeout errors
- Invalid document type enum value causes request validation failure
- Limit parameter out of range (below 1 or above 50) causes validation error
- Very broad search terms may return noisy or irrelevant results within the 50-document cap

## How this service works

Search the US Federal Register (official public-domain government record) by topic: proposed rules, final rules, notices and presidential documents, with agency, publication date, abstract and official link. Filter by type and recency. Complements SEC/CFTC RSS tracking.

## Output

Returns a JSON object with a topic label, data source attribution, total number of matching documents, and an array of matching documents each containing: title, publication date, document type (Rule/Proposal/Warning/Presidential), URL link to the full text on federalregister.gov, plain-language summary, and list of issuing agencies.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "days": {
   "type": "integer",
   "description": "Only documents from the last N days (default 180)"
  },
  "term": {
   "type": "string",
   "description": "Topic, e.g. cryptocurrency, digital asset, stablecoin, artificial intelligence"
  },
  "type": {
   "enum": [
    "rule",
    "proposal",
    "warning",
    "presidential"
   ],
   "type": "string",
   "description": "Document type"
  },
  "limit": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "description": "Results (1-50, default 10)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "type": "todos",
  "topic": "digital asset",
  "source": "Federal Register (federalregister.gov, US public domain)",
  "documents": [
   {
    "date": "2026-09-30",
    "link": "https://www.federalregister.gov/documents/2026/09/30/2026-20009/publication-of-venezuela-sanctions-regulations-web-general-licenses-46d-47b-48c-50c-51c-52b-54b-and",
    "type": "Rule",
    "title": "Publication of Venezuela Sanctions Regulations Web General Licenses 46D, 47B, 48C, 50C, 51C, 52B, 54B, and 61A",
    "summary": "The Department of the Treasury's Office of Foreign Assets Control (OFAC) is publishing eight general licenses (GLs) issued pursuant to the Venezuela Sanctions Regulations: GLs 46D, 47B, 48C, 50C, 51C, 52B, 54B, and 61A, each of which was previously made available on OFAC's website.",
    "agencies": [
     "Treasury Department",
     "Foreign Assets Control Office"
    ]
   },
   {
    "date": "2026-09-30",
    "link": "https://www.federalregister.gov/documents/2026/09/30/2026-20008/publication-of-venezuela-sanctions-regulations-web-general-licenses-52-53-54-55-56-57-and-58",
    "type": "Rule",
    "title": "Publication of Venezuela Sanctions Regulations Web General Licenses 52, 53, 54, 55, 56, 57, and 58",
    "summary": "The Department of the Treasury's Office of Foreign Assets Control (OFAC) is publishing seven general licenses (GLs) issued pursuant to the Venezuela Sanctions Regulations: GLs 52, 53, 54, 55, 56, 57, and 58, each of which was previously made available on OFAC's website.",
    "agencies": [
     "Treasury Department",
     "Foreign Assets Control Office"
    ]
   }
  ],
  "total_matches": 308
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-federal-register-document-search-41c2bba7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)