Preview endpoint
This static endpoint is suitable for exploration and prototypes. It has no stability, uptime or support guarantee. Do not use it for payroll or filing.
Countries
Returns 114 jurisdictions with identifiers, currency, tax year, model quality, headline bands and source links.
Example
{
"updated": "2026-09-04",
"count": 114,
"countries": [
{
"slug": "united-kingdom",
"currency": "GBP",
"taxYear": "2026/27",
"quality": "detailed"
}
]
}Calculation access
The current endpoint publishes reference metadata only. A supported calculation API would need versioned model releases, request validation, jurisdiction-specific test fixtures and a service-level policy. We will not market a thin wrapper around an unversioned browser function as payroll infrastructure.
Discuss an integration