Ausref Compare — Oceania Government Reference Data Cross-Country Comparison

Use this endpoint when you need to compare a single government reference series (VAT, policy rate, minimum wage, CPI, corporate tax, etc.) across multiple Australasian/Pacific nations in a single call with official citations and dates. Prefer this over the per-country single-series endpoints when you need cross-country comparison rather than a single country's value, and over the full snapshot endpoint when you only need one specific series rather than all series for all countries.

• Invalid or unsupported series ID — returns error indicating valid series from /catalog
• Invalid ISO 3166-1 alpha-2 country code in the countries parameter
• More than 10 countries requested — returns validation error
• Country not covered by Ausref (non-Australasian country code) — returns not-found or empty result for that entry
• Payment not provided or insufficient — 402 Payment Required
• Stale data — last_confirmed date may lag if official government sources have not been recently scraped