United States Federal Register Documents
Every rule, proposed rule and notice published by US federal agencies, updated daily.
The Federal Register is the official daily journal of the United States government, containing proposed rules, final rules, presidential documents and public notices from every federal agency. This feed returns the most recent published documents with title, type, abstract, publication date and links to the official HTML and PDF versions. Compliance teams, legal tech products and regulatory-monitoring AI agents use it to detect rule changes the day they are published.
Source: Federal Register API (Office of the Federal Register / GPO) · Public Domain (U.S. Government work, 17 U.S.C. 105) · Source: Federal Register, Office of the Federal Register, U.S. National Archives and Records Administration.
Endpoints
Every request is authenticated with your X-API-Key and counted against your plan.
- GET /v1/data/united-states-federal-register-documents
- GET /v1/data/united-states-federal-register-documents/search?q=...
- GET /v1/data/united-states-federal-register-documents/{key}
Base path /v1/data/united-states-federal-register-documents · full reference in the interactive docs. Also exposed as an MCP tool for AI agents.
Fields
| Field | Type | Description |
|---|---|---|
| document_number | str | Unique Federal Register document number, e.g. 2026-01234 |
| title | str | Official title of the document |
| document_type | str | Rule, Proposed Rule, Notice or Presidential Document |
| abstract | str | Agency-written summary of the document |
| publication_date | date | Date the document was published in the Federal Register |
| html_url | str | Link to the official web version |
| pdf_url | str | Link to the official PDF version |
What you get
FAQ
- How far back does the data go?
- This API serves the most recent publications from the official feed, refreshed on our ingest schedule. It is designed for change monitoring rather than deep historical archives.
- Does it include the full text of each rule?
- It includes the agency abstract plus links to the official full text. The complete rule body stays at the government source of record.
- Can I use this commercially?
- Yes. Federal Register content is a U.S. Government work in the public domain.
Pricing
Simple, transparent pricing
Start free, upgrade when you need more. All plans include full API access.
Free
Get started and explore the API
- 100 API requests per day
- All endpoints included
- Community support
Pro
For production apps and AI agents
- 10,000 API requests per day
- All endpoints included
- Priority support
- Usage dashboard
Enterprise
Unlimited access for high-volume use
- Unlimited API requests
- All endpoints included
- Priority support
- Usage dashboard
- Dedicated support channel
Getting Started
Start building in minutes
Register for a free API key, make your first request, and upgrade when you're ready.
Register
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curl -X POST https://api.aristocles.com.au/v1/auth/register \
-H "Content-Type: application/json" \
-d '{"email": "you@example.com", "name": "Your Name"}'Make a request
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curl https://api.aristocles.com.au/v1/data/asx \
-H "X-API-Key: your_api_key_here"Upgrade
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curl -X POST "https://api.aristocles.com.au/v1/billing/checkout?tier=pro" \
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curl https://api.aristocles.com.au/v1/usage \
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