Federal Register API

Overview

Measurement Record

What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.

Request

GET https://www.federalregister.gov/api/v1/documents.json?conditions%5Bterm%5D=climate&per_page=5&order=newest

Result

HTTP 200 · application/json · 13,788 bytes · compressed

Response time

236 ms (median of 3) · fastest 185 ms

Transport

TLSv1.3 · TLS_AES_128_GCM_SHA256 · certificate issued by Amazon

Browser CORS

Allowed — Access-Control-Allow-Origin: *

Recorded

2026-08-10

Fields Returned

Top-level fields present in the response we captured, with the type and value we actually received.

Captured Response

Captured from a real request to https://www.federalregister.gov/api/v1/documents.json?conditions%5Bterm%5D=climate&per_page=5&order=newest on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.

{
  "description": "Documents matching 'climate'",
  "count": 10000,
  "total_pages": 50,
  "next_page_url": "https://www.federalregister.gov/api/v1/documents?conditions%5Bterm%5D=climate&format=json&order=newest&page=2&per_page=5",
  "results": [
    {
      "title": "Oil and Gas and Sulfur Operations on the Outer Continental Shelf-Revisions to the Requirements for Exploratory Drilling on the Arctic Outer Continental Shelf",
      "type": "Proposed Rule",
      "abstract": "The Department of the Interior (DOI or Department), acting through BSEE and BOEM (collectively, \"the Bureaus\"), is proposing to revise its existing regulatio…",
      "document_number": "2026-15953",
      "html_url": "https://www.federalregister.gov/documents/2026/08/06/2026-15953/oil-and-gas-and-sulfur-operations-on-the-outer-continental-shelf-revisions-to-the-requirement…",
      "pdf_url": "https://www.govinfo.gov/content/pkg/FR-2026-08-06/pdf/2026-15953.pdf",
      "public_inspection_pdf_url": "https://public-inspection.federalregister.gov/2026-15953.pdf?1785933913",
      "publication_date": "2026-08-06",
      "agencies": [
        {
          "…": "(7 more fields)"
        }
      ],
      "excerpts": "safety and environmental protection. On June 29, 2021, the Bureaus withdrew the proposed rule (\n see \n 86 FR 34172) due to a change in administration and pol…"
    }
  ]
}

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

const url = "https://www.federalregister.gov/api/v1/documents.json?conditions%5Bterm%5D=climate&per_page=5&order=newest";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

import requests

url = "https://www.federalregister.gov/api/v1/documents.json?conditions%5Bterm%5D=climate&per_page=5&order=newest"
headers = {}

response = requests.get(url, headers=headers, timeout=30)
response.raise_for_status()
data = response.json()
print(data)

curl "https://www.federalregister.gov/api/v1/documents.json?conditions%5Bterm%5D=climate&per_page=5&order=newest"

What Can You Build?

// Fetch government/public data
const response = await fetch(`https://www.federalregister.gov/reader-aids/developer-resources/rest-api`);
const data = await response.json();
const records = data.results || data.data || data.records || [];
const items = Array.isArray(records) ? records : [records];
items.slice(0, 5).forEach(item => {
  console.log('Record:', item.title || item.name || JSON.stringify(item));
});

// Visualize government data
const response = await fetch(`https://www.federalregister.gov/reader-aids/developer-resources/rest-api`);
const data = await response.json();
console.log('Data source: Federal Register');
const stats = data.statistics || data.data || data;
document.getElementById('gov-dashboard').innerHTML =
  `<pre>${JSON.stringify(stats, null, 2)}</pre>`;

// Query government datasets
const response = await fetch(`https://www.federalregister.gov/reader-aids/developer-resources/rest-api`);
const data = await response.json();
const results = data.results || data.items || [];
console.log(`Found ${results.length || 'N/A'} records`);
results.slice(0, 3).forEach(r => {
  console.log(`📋 ${r.title || r.name}: ${r.description || ''}`);
});

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

How This API Fails

We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.

Common Errors & Troubleshooting

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.