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API · /fedregister-api

US Federal Register API

healthy 4,452 Subscribers

The US Federal Register as an API — the official daily journal of the United States government, live from federalregister.gov. Search the full record of federal rules, proposed rules, public notices and presidential documents (including executive orders) by keyword, document type, issuing agency and publication-date range; fetch any document by its number with title, abstract, agencies, publication and signing dates, executive-order number and links to the official HTML and PDF; and list the 470+ federal agencies. Ideal for legal-tech, compliance, regulatory-monitoring, government-transparency, policy-research and news applications. Public-domain US government data.

#federal-register #government #regulations #executive-orders #law #usa
api.oanor.com/fedregister-api
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Machine-readable spec so AI agents can integrate this API.

/api/fedregister-api/openapi.json
/api/fedregister-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
251 ms
Server probes · 24h
Subscribers
4,452
active
Total calls
232
last 7 days
status Full status page → · 232 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,600 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,600 calls/month
  • 2 req/sec
  • Search + document + agencies
  • No credit card
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Starter

€5.20 /month

  • 49,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 49k calls/month
  • 8 req/sec
  • Type / agency / date filters
  • Email support
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Pro

€14.80 /month

  • 255,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 255k calls/month
  • 20 req/sec
  • Compliance / regulatory monitoring
  • Priority support
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Mega

€37.50 /month

  • 1,230,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.23M calls/month
  • 50 req/sec
  • Legal-tech / policy platform
  • Dedicated SLA
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api.oanor.com/ukparliament-api

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api.oanor.com/treasury-api

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api.oanor.com/usaspending-api

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Every member of the United States Congress as an API — all 12,766 legislators, current and historical, from 1789 to today. Look up any member by Bioguide or GovTrack id, or search and filter the full roster by name, US state, party and chamber (Senate / House), and list the current members of Congress. Each record carries the member's name, gender, birthday, party, state and district, chamber, the number of terms served and the complete term-by-term history with start and end dates, plus cross-reference ids (GovTrack, OpenSecrets, FEC, Wikipedia, Wikidata). Ideal for civic-tech, news, government-transparency, lobbying and political-research apps. Data from the public-domain @unitedstates project.

api.oanor.com/congress-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for US Federal Register API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call US Federal Register API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for US Federal Register API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does US Federal Register API cost?
US Federal Register API has a free tier with 100 calls / month. Paid plans start at €5.20 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is US Federal Register API GDPR-compliant?
All requests to US Federal Register API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/fedregister-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/fedregister-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/fedregister-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/fedregister-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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