Federal Register

liveGovernmentLegalLegislature

US Federal Register API — search and retrieve proposed rules, final rules, notices, and presidential documents from the Federal Register (no auth).

3tools
0msauth
free tier50 calls/day

Tools

search_documents

Search the US Federal Register by topic / keyword for proposed rules, final rules, notices, and presidential documents. **Use this whenever the question mentions a SUBJECT** ("EV tax credits", "AI exp

No parameters required.

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get_document

Get full details for a Federal Register document by its document number (e.g., "2024-12345"). Returns title, abstract, full text link, agencies, dates, and docket information. For a presidential docum

No parameters required.

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recent_rules

Browse the most recently published final rules and regulations from the Federal Register, **with no topic filter** — returns whatever was published most recently across every agency (FAA airworthiness

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash
curl -X POST https://gateway.pipeworx.io/federal-register/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash
curl -X POST https://gateway.pipeworx.io/federal-register/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"search_documents","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("search_documents", {});
ask_pipeworx
// Or ask in plain English:
const answer = await px.ask("us federal register api — search and retrieve proposed rules, final rules, notices, and presidential documents from the federal register (no auth)");