npm changelog between two versions: the full release notes of every version in the range (newest first, up to 100), from the package CHANGELOG and GitHub releases, with publish dates, bump type (major, minor, patch), npm deprecations, extracted breaking changes and package.json manifest changes. Covers a whole package upgrade or dependency upgrade in one call instead of reading dozens of release pages.

US federal agency directory — the Federal Register's agency slugs, names, short names and parent-child links, searchable by substring. Use to find the slug an agency filter needs, e.g. environmental-protection-agency for the EPA.

US overnight interest rates — latest SOFR and effective federal funds rate (EFFR), transaction volumes and policy target bounds. Compare secured and unsecured dollar funding costs and track monetary policy. x402Atlas is not affiliated with the New York Fed. The New York Fed does not sanction, endorse, or recommend any products or services offered by x402Atlas.

Look up a US federal contractor in SAM.gov by UEI or legal business name: registration status and expiration, CAGE code, exclusion flag, NAICS codes and business types.

skypeek (Tanod) METAR / TAF decoder. Not for flight planning or navigation. Use when an agent holds a raw METAR or TAF string and needs it decoded into fields.

Digest of a public company's latest SEC filings (10-K, 10-Q, 8-K), recent insider filings and key annual financials. Source: SEC EDGAR.

skypeek (Tanod) METAR reports, raw and decoded, for 1-20 stations (NOAA aviationweather.gov). Not for flight planning or navigation. Use when an agent needs the current METAR weather observation for 1-20 airports.

US national debt — latest total federal debt, debt held by the public and intragovernmental holdings in US dollars. Track government borrowing and build fiscal monitoring dashboards.

US federal regulation counts — how many Federal Register documents match a search, grouped by agency, document type, year, quarter, month, topic or section, with the same filters as the search. Use to see which agencies regulate a subject, how rulemaking activity moved over time, or which topics a term touches.

Argentina central bank (BCRA) statistics: one page of monetary variables or dated observations of a series (interest rates, reserves, exchange rate, inflation indicators) from BCRA's public API v4.0, with source URL and read time. Use this when an agent needs official Argentine macro data with provenance. JSON, no model inference. Free sample at /api/bcra-indicadores/sample.

US federal regulations in the pipeline — documents on public inspection at the Federal Register, filed by agencies and scheduled to publish, with type, agencies, filing time and the scheduled date. Use to see tomorrow's rules, notices and executive orders before they are published.

US Treasury interest rates — latest monthly average rates on outstanding government debt, including Treasury bills, notes, bonds, TIPS, floating-rate notes and savings securities. Track federal borrowing costs and compare rates across security classes.

PyPI breaking changes between two versions of a Python package, before a pip package upgrade: the documented breaking changes per version from the project's CHANGELOG, HISTORY or CHANGES file and GitHub release notes (alpha/beta/rc folded into the major), plus Requires-Python and required dependency changes, yanked versions, migration guide links and a verdict. PEP 440 versions ('1.10.13', '2.0') or a major ('1'); a source URL for every item.

Recent news headlines for any company, topic or query: deduplicated titles with source, link and publish date from a broad news index. Window configurable 1-30 days. JSON response. $0.01 USDC per call, pay via x402, no API key.

Encode or decode text: base64, base64url, hex, URL (percent) encoding and HTML escaping.

US federal regulation updates feed — Federal Register documents an agency published in the last N days, newest first, with type, abstract, effective date and comment deadline. Use to monitor the EPA, SEC, FDA or any agency for new rules, proposed rules and notices.

UUID inspector — parses any UUID (canonical, braces, URN or 32-hex form) and returns its version, variant, embedded timestamp for v1/v6/v7, nil/max flags, hex and URN forms. Use to validate identifiers or recover the creation time of UUIDv7 keys.

Compare two texts by lines, words or characters: what was added and removed, and a unified diff for lines.

Generates standards-compliant UUIDs from a cryptographic random source: version 4 (random) or version 7 (time-ordered, sorts by creation time, good for database keys), one or up to 100 per call. Useful for idempotency keys, record IDs, and correlation IDs. Not charged for invalid options.

Current time from a reliable server clock: UTC ISO timestamp, Unix seconds and milliseconds, and optionally the local date, time, weekday, and UTC offset in any IANA time zone (daylight saving handled). Useful because language models don't know the current date or time. Not charged for an unknown time zone.