Federal Register search: US rules and notices

$0.01 per call · failed calls are never charged · no account or API key needed

Search the US Federal Register: final rules, proposed rules, notices and presidential documents, newest first, with title, type, agencies, abstract, publication date, comment deadline, effective date and links. Filter by type and agency. From the Federal Register API (US government work). Use to track new regulations or open comment periods on a topic.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Try it with your own inputs

Search words, e.g. artificial intelligence

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
q (required)stringSearch words, e.g. artificial intelligence
typestringrule, proposed_rule, notice or presidential (default all)
agencystringAgency slug, e.g. securities-and-exchange-commission (optional)
limitstringDocuments to return, 1-20 (default 10)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/gov/federal-register?q=artificial%20intelligence"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/gov/federal-register?q=artificial%20intelligence&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "query": "artificial intelligence",
  "total": 1605,
  "count": 1,
  "documents": [
    {
      "title": "Outbound Investment Security Program Regulations",
      "type": "Rule",
      "agencies": [
        "Treasury Department"
      ],
      "abstract": "…",
      "published": "2026-10-24",
      "commentsClose": null,
      "effective": "2026-11-24",
      "documentNumber": "2026-21001",
      "url": "https://www.federalregister.gov/documents/2026/10/24/2026-21001/…",
      "pdf": "https://www.govinfo.gov/…"
    }
  ],
  "source": "Federal Register API (federalregister.gov)"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is gov_federal_register, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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