usaref

North American government reference data for AI agents: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays across 10 countries. Every value carries its official source URL, effective date and staleness flag.

Skills

• List available series
  Catalog of 14 series types across 10 North American countries
  catalogdiscovery
• Public holidays
  Official public holidays for a country and year
  holidayscalendar
• Change and freshness feed
  Free, unmetered feed of series whose current value moved, plus how recently the served set was re-verified. Poll this instead of re-buying a series.
  changesfreshnessdiscovery
• Re-verification calendar
  Free, unmetered re-verification window for this brand. reverify_by is derived from last_confirmed + update_cycle_days. status unknown omits any next date. Notes are not parsed. Not an MPC, budget, or wage-review date.
  calendarfreshnessdiscovery
• Get a reference value
  One cited reference value (policy rate, VAT, minimum wage, CPI, corporate or personal income tax) with source URL and effective date
  reference-datagovernment
• Series history
  Historical values for a series over a date range
  historytime-series
• Regional snapshot
  Every current series value for every country in the region
  bulksnapshot
• Country brief
  Every series for one country in one call, each cited
  bundlecountry-profile
• Validate a tax ID / VAT number
  Format and (where published) official check-digit validation of a tax ID or VAT number: valid/invalid, normalised form, id type, failure reason, cited
  tax-idvat-numbervalidation
• Compare across countries
  One series across up to 10 countries in one call, each row cited
  bundlecompare
• Cross-border VAT determination (for x402/API sellers)
  For a seller making a cross-border digital sale: which jurisdiction's VAT applies, who accounts for it, the registration trigger and rate basis — each cited to the statute (EU, UK & South Africa; defined supply pairs). Handles the wallet-only, unidentified-buyer case that x402 settlements produce.
  vattaxcompliancex402-sellerscross-border
• Statutory interest
  Simple interest on a principal at the cited statutory-interest series rate (Actual/365). A series with no numeric rate is refused free. Optional receipt:true on the paid HTTP 200, included in this answer's price. Verify with verify_answer_receipt (free).
  intereststatutory-interest
• Verify an answer receipt
  Free check of an answer receipt (kind answer_receipt) against the public key at /certified/public-key. Confirms this service signed that receipt. Not a series certified extract and not legal advice.
  receiptverification

How to call

https://usaref.dev/mcp

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