# Services from usaref.dev on Zero

> usaref.dev serves 11 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/usaref.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/usaref.dev/health.json

## Services

- [usaref Working Days / Government Reference Data Series](https://www.zero.xyz/c/usaref-working-days-government-reference-data-series-00426c0b/llms.txt): $0.001/call via x402. Returns a specific North American government reference data series (e.g. public holidays, minimum wage, VAT, policy rate) for a given country
- [usaref North American Government Reference Data – History Series](https://www.zero.xyz/c/usaref-north-american-government-reference-data-history-series-5f834f9b/llms.txt): $0.005/call via x402. Returns the full historical time-series for a specific government reference data series (e.g. policy rates, VAT rates, minimum wages, public holidays) for a given North American country (CA or US), with citations to official primary sources.
- [usaref Wage Check – North American Minimum Wage Reference](https://www.zero.xyz/c/usaref-wage-check-north-american-minimum-wage-reference-cf151042/llms.txt): $0.001/call via x402. Returns the current official minimum wage for Canada or the United States as authoritative JSON with a citation to the primary government source, effective date, last-confirmed date, and staleness flag.
- [usaref VAT Rate Lookup](https://www.zero.xyz/c/usaref-vat-rate-lookup-ff469115/llms.txt): $0.001/call via x402. Returns the current VAT/sales-tax rate for Canada or the United States as a clean JSON value with an official government citation, effective date, and staleness flag.
- [usaref North American Government Reference Data](https://www.zero.xyz/c/usaref-north-american-government-reference-data-9e1b085a/llms.txt): $0.005/call via x402. Returns authoritative, cited government reference values (policy rates, VAT rates, minimum wages, public holidays) for Canada and the US as clean JSON with official source citations and freshness metadata.
- [usaref Government Reference Data Series](https://www.zero.xyz/c/usaref-government-reference-data-series-e88400d0/llms.txt): $0.005/call via x402. Returns a single government reference data series (e.g. policy rate, VAT, minimum wage, CPI, corporate tax, income tax, or public holidays) for a specified North American country
- [usaref Changes Feed – North American Government Reference Data](https://www.zero.xyz/c/usaref-changes-feed-north-american-government-reference-data-b844e70d/llms.txt): $0.005/call via x402. Returns a list of government reference data series (policy rates, VAT, minimum wages, public holidays) that have changed since a given date for Canada and/or the US.
- [usaref Webhook Alert Registration](https://www.zero.xyz/c/usaref-webhook-alert-registration-b36d7860/llms.txt): $0.1/call via x402. Registers a webhook endpoint to receive real-time notifications when North American government reference data series (policy rates, VAT rates, minimum wages, public holidays) change
- [usaref Income Tax Rate Lookup](https://www.zero.xyz/c/usaref-income-tax-rate-lookup-672d6f96/llms.txt): $0.001/call via x402. Returns authoritative North American income tax reference data for Canada or the United States as clean JSON with official citations and staleness flags
- [usaref All Series Snapshot](https://www.zero.xyz/c/usaref-all-series-snapshot-89dbd87a/llms.txt): $0.02/call via x402. Returns a complete snapshot of every government reference data series (tax rates, wages, holidays, etc.) for all countries tracked by usaref
- [usaref Government Reference Data History](https://www.zero.xyz/c/usaref-government-reference-data-history-f05f690d/llms.txt): $0.005/call via x402. Returns the historical time-series of a specific government reference data series (e.g. policy rate, VAT, minimum wage) for a given North American country

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)