federalregister.latest

stable Advanced

Latest Federal Register documents.

GET /v1/federalregister/latest

What you get#

A list of Federalregister results in Onekey's unified shape, in data (an array). An empty array is a normal, successful answer and is charged like any other; a source that reports "nothing found" as an error returns a free 404 not_found instead.

What it costs#

Advanced · 5 credits for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`per_page`	string	no	`20`	Rows (1-100)	max 3 chars; must match `[1-9]\d?\|100`; trimmed

Request#

curl "https://api.onekey.dev/v1/federalregister/latest?per_page=5" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Federalregister response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": [
    {
      "content": {
        "id": "C1-2026-18574",
        "title": "Information Reporting Regarding Qualified Opportunity Zones and Updated Qualified Opportunity Fund Certification and Decertification Procedures",
        "text": null,
        "url": "https://www.federalregister.gov/documents/2026/09/28/C1-2026-18574/information-reporting-regarding-qualified-opportunity-zones-and-updated-qualified-opportunity-fund",
        "createdAt": "2026-09-28T00:00:00Z"
      },
      "entity": {
        "category": "Proposed Rule"
      },
      "author": {
        "displayName": "Treasury Department",
        "username": "treasury-department"
      },
      "media": {
        "url": "https://www.govinfo.gov/content/pkg/FR-2026-09-28/pdf/C1-2026-18574.pdf"
      },
      "ext": {
        "pages": null
      }
    },
    {
      "content": {
        "id": "2026-19843",
        "title": "Notice of Policy Change and Rescission of Single-Pilot Training Exemptions for Certain Cessna Aircraft",
        "text": "Based on safety concerns and a review that revealed widespread non-compliance with the exemptions, the FAA is announcing its decision to cease issuing exemptions that allow certain Cessna aircraft that require two pilots to operate as a single-pilot operation, and notifying current exemption holders that their exemptions will be rescinded by separate action. This notice also serves to inform pilot",
        "url": "https://www.federalregister.gov/documents/2026/09/28/2026-19843/notice-of-policy-change-and-rescission-of-single-pilot-training-exemptions-for-certain-cessna",
        "createdAt": "2026-09-28T00:00:00Z"
      },
      "entity": {
        "category": "Rule"
      },
      "author": {
        "displayName": "Transportation Department",
        "username": "transportation-department"
      },
      "media": {
        "url": "https://www.govinfo.gov/content/pkg/FR-2026-09-28/pdf/2026-19843.pdf"
      },
      "ext": {
        "pages": null
      }
    }
  ],
  "metadata": {
    "platform": "federalregister",
    "endpoint": "latest",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 5,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`document_number`	`content.id`	-
`title`	`content.title`	-
`abstract`	`content.text`	-
`html_url`	`content.url`	`safeUrl`
`publication_date`	`content.createdAt`	`toIsoDate`
`type`	`entity.category`	-
`agencies.0.name`	`author.displayName`	-
`agencies.0.slug`	`author.username`	-
`pdf_url`	`media.url`	`safeUrl`
`page_length`	`ext.pages`	`toNumber`

Caching and freshness#

Fresh for about 2 minutes. Repeat calls in that window are served from cache and are free.
Between 2 minutes and 15 minutes the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 1 hour more (marked stale).
A "not found" is remembered for 1 minute and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	Unknown endpoint path.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).