# Federal Register Search

> Federal Register Search is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.034/call, status unknown (last checked 2026-09-13).

Searches the U.S. Federal Register for recent rules, proposed rules, notices, and presidential documents matching a keyword or phrase.

## Facts

- Endpoint: GET https://the-stall.intuitek.ai/cap/federal-register-search
- Price: $0.034/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/federal-register-search-4f66582d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Nn4xi7WRB_-WGjEoDkXQg

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 federal-register-search-4f66582d
```

Example prompt: Search the Federal Register for any rules or proposed rules about 'artificial intelligence' published in the last 180 days — limit to 15 results and only show significant documents.

## When to prefer this

Use this endpoint when you need to search U.S. federal government regulatory documents — rules, proposed rules, notices, or presidential documents — by keyword, filtered by recency, type, or significance. Prefer this over general web search when you need structured, authoritative regulatory data with metadata. Ideal for compliance monitoring, legal research, policy tracking, and regulatory intelligence tasks.

## Known failure modes

- Missing required 'q' parameter returns a 400 validation error
- Query returns zero results if no matching documents exist in the specified date range
- 'days' parameter exceeding 730 is rejected with a validation error
- Unavailable upstream Federal Register API may result in a 502 or timeout
- Payment failure via x402/USDC returns a 402 Payment Required response

## How this service works

Search the Federal Register for Rules, Proposed Rules, and Notices matching a keyword — returns title, abstract, document type, agencies, significance, effective date, and links. No API key. $0.002/call.

## Output

Returns a list of up to 20 Federal Register documents matching the search query, each with metadata such as title, document type (Rule, Proposed Rule, Notice, Presidential Document), publication date, issuing agency, and a link or abstract. Filtered optionally by date range, document type, and significance flag.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/federal-register-search-4f66582d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from the-stall.intuitek.ai](https://www.zero.xyz/host/the-stall.intuitek.ai/llms.txt)