Code of Federal Regulations title currency status

At a glance

Publisher

Office of the Federal Register (National Archives) · homepage

Category

Regulation & rulemaking

Jurisdiction

United States (federal)

Publisher updates

Each federal business day as the eCFR incorporates Federal Register amendments

SourceFinch checks

Daily by default

Records per run

50 in the latest run

Record key

title_number

Acquired from

Publisher's public API: https://www.ecfr.gov/api/versioner/v1/titles.json

Recipe

v1.0.0, approved October 12, 2026

Verified since

October 12, 2026

Last green run

October 12, 2026

What the data contains

The Electronic Code of Federal Regulations (eCFR) is the continuously updated editorial compilation of the Code of Federal Regulations maintained by the Office of the Federal Register and the Government Publishing Office. Its titles endpoint lists all 50 CFR titles with the date each was last amended, the latest Federal Register issue incorporated into it and the date it is up to date through. This source reads that one small document (about 8 KB) each run and makes one record per title keyed by the title number, so a monitor reports the day any title's latest_amended_on moves, which is the earliest structured signal that a regulation in that title changed. Title 35 is reserved and carries no dates. The eCFR is not the official legal edition of the CFR; the annual edition on govinfo.gov is. The full-text and rendering endpoints of the eCFR API are disallowed by robots.txt and are not used; only the titles summary is read. The records describe regulatory titles and contain no personal data.

Fields and types

Every record has these fields. The key field title_number identifies a record across runs, so changes are reported field by field.

Sample output

The first 5 of 50 records from SourceFinch's own run on October 12, 2026, exactly as delivered.

[
  {
    "name": "General Provisions",
    "reserved": false,
    "title_number": "1",
    "up_to_date_as_of": "2026-10-08",
    "latest_amended_on": "2022-12-29",
    "latest_issue_date": "2026-08-10"
  },
  {
    "name": "Federal Financial Assistance",
    "reserved": false,
    "title_number": "2",
    "up_to_date_as_of": "2026-10-08",
    "latest_amended_on": "2026-08-17",
    "latest_issue_date": "2026-08-18"
  },
  {
    "name": "The President",
    "reserved": false,
    "title_number": "3",
    "up_to_date_as_of": "2026-10-08",
    "latest_amended_on": "2015-03-17",
    "latest_issue_date": "2024-05-17"
  },
  {
    "name": "Accounts",
    "reserved": false,
    "title_number": "4",
    "up_to_date_as_of": "2026-10-08",
    "latest_amended_on": "2024-07-18",
    "latest_issue_date": "2024-07-18"
  },
  {
    "name": "Administrative Personnel",
    "reserved": false,
    "title_number": "5",
    "up_to_date_as_of": "2026-10-08",
    "latest_amended_on": "2026-10-05",
    "latest_issue_date": "2026-10-05"
  }
]

Evidence behind every value

• Each run keeps the publisher's exact response, hashed with SHA-256. This sample came from a response with hash 52b783ba376191aa1a49df716665503787669300f72c6dcf7e11bb5d8375d6e0.
• Every value records where it came from in that response: a JSON Pointer into the retained capture.
• Each run gets a signed manifest (Ed25519) timestamped by an RFC 3161 authority: this run's manifest hash is 730b9ac0137a142003534172fde4c31ef99b951f81678834cb64a76f88089469, timestamped October 12, 2026.
• The compliance state at capture is recorded with the evidence: robots.txt hash and verdict, AI-preference signals, crawler identity and the usage rights below.
• Download any run as an evidence bundle (WACZ) and check it offline, without trusting SourceFinch: sourcefinch verify-bundle run.wacz.

Terms posture and usage rights

The eCFR publishes a documented public REST API (versioner, search and renderer services) that needs no key or registration. The Code of Federal Regulations is a work of the U.S. government (17 U.S.C. 105). eCFR's robots.txt disallows only the full-text (/api/versioner/v1/full/) and renderer (/api/renderer/) endpoints; the titles summary endpoint used here is allowed. The eCFR is an editorial compilation and not the official legal edition. Like FederalRegister.gov, the HTML site challenges unidentified automated clients, so SourceFinch uses only the API, which answered SourceFinch's declared crawler at review.

Usage rights travel with every record SourceFinch delivers (API, exports, webhooks and evidence bundles). They are our documented understanding of the publisher's stated terms, not legal advice.

Reliability

Runs, last 30 days

1

Green

100%

Failed

0

Median run time

0.7 s

Latest run

success, October 12, 2026

Measured on completed runs of this recipe version across SourceFinch, anonymized, within a rolling 30-day window. First successful observation: October 12, 2026. A new recipe has only the history collected since that date; this is not a 30-day uptime guarantee.

Use it

Every surface creates the same monitor from this Verified recipe. Monitors keep record history, report field-level changes and deliver by webhook, export or email. You confirm you have the right to collect the source (rights: true).

{
  "schema": "sourcefinch/source@1",
  "name": "Code of Federal Regulations title currency status",
  "url": "https://www.ecfr.gov/api/versioner/v1/titles.json",
  "recipe": {
    "mode": "http",
    "format": "json",
    "items": "titles[*]",
    "fields": {
      "name": "name",
      "reserved": "reserved",
      "title_number": "number",
      "up_to_date_as_of": "up_to_date_as_of",
      "latest_amended_on": "latest_amended_on",
      "latest_issue_date": "latest_issue_date"
    },
    "required": [
      "title_number",
      "name"
    ],
    "types": {
      "latest_amended_on": "date",
      "latest_issue_date": "date",
      "reserved": "boolean",
      "title_number": "string",
      "up_to_date_as_of": "date"
    }
  },
  "schedule": "daily",
  "key_field": "title_number"
}

{
  "name": "Code of Federal Regulations title currency status",
  "url": "https://www.ecfr.gov/api/versioner/v1/titles.json",
  "recipe": {
    "mode": "http",
    "format": "json",
    "items": "titles[*]",
    "fields": {
      "name": "name",
      "reserved": "reserved",
      "title_number": "number",
      "up_to_date_as_of": "up_to_date_as_of",
      "latest_amended_on": "latest_amended_on",
      "latest_issue_date": "latest_issue_date"
    },
    "required": [
      "title_number",
      "name"
    ],
    "types": {
      "reserved": "boolean",
      "title_number": "string",
      "up_to_date_as_of": "date",
      "latest_amended_on": "date",
      "latest_issue_date": "date"
    }
  },
  "key_field": "title_number",
  "schedule": "daily",
  "rights": true,
  "catalog": {
    "slug": "ecfr-title-status",
    "version_id": "159ddf66-7adf-4cab-8469-51f2b7c326f6"
  }
}

# the Verified entry (fields, recipe, sample, terms) as JSON
curl https://sourcefinch.com/v1/catalog/ecfr-title-status -H "Authorization: Bearer $SOURCEFINCH_API_KEY"

# create the monitor from source.json (below)
curl -X POST https://sourcefinch.com/v1/sources \
  -H "Authorization: Bearer $SOURCEFINCH_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d @source.json

# then run it now (later runs follow the schedule)
curl -X POST https://sourcefinch.com/v1/sources/$SOURCE_ID/runs \
  -H "Authorization: Bearer $SOURCEFINCH_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)"

sourcefinch login
sourcefinch catalog get ecfr-title-status --source-json > source.json
sourcefinch sources create --file source.json
sourcefinch runs create $SOURCE_ID --wait
sourcefinch records $SOURCE_ID

import { SourceFinch } from "@sourcefinch/sdk";

const sf = new SourceFinch({ apiKey: process.env.SOURCEFINCH_API_KEY });
const entry = await sf.catalog.get("ecfr-title-status");
const source = await sf.sources.create({
  catalog: { slug: entry.slug, version_id: entry.recipe.version_id },
  name: entry.name.slice(0, 100),
  url: entry.acquisition_path.endpoint,
  recipe: entry.recipe.definition,
  key_field: entry.recipe.key_field,
  schedule: entry.recipe.schedule,
  rights: true, // you confirm you have the right to collect this source
});
const run = await sf.runs.wait((await sf.runs.create(source.id)).id);
console.log(run.status);

claude mcp add --transport http sourcefinch https://sourcefinch.com/mcp

# then ask your agent:
"Use SourceFinch to monitor Code of Federal Regulations title currency status: get_catalog_source ecfr-title-status,
then create_source with its create_source_args (dry run first), then run_source."

Pricing

Each check is one run, whatever the number of records, and failed runs are free. On its default daily schedule this source uses about 30 runs a month, which fits the Free plan's 300 runs. It uses HTTP acquisition, so no browser runs are needed. See plans.

Guides using this source

• Follow new federal rules and Code of Federal Regulations changes

All guides

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