Seventeen endpoints. That's it.

Calculate tax

GET/calculate-tax

Exact GST, PST, HST, and QST for any amount in any province, including BC's split tax and the federal luxury tax on new vehicles.

Validate address

POST/validate-address

Verify, normalize, and geocode Canadian addresses with postal-code precision.

Shipping check

GET/shipping-check

Check whether a postal code is shippable and flag remote-surcharge areas.

Tax categories

GET/tax-categories

List product tax categories so every cart line gets the right provincial rules.

Classify product

GET/classify-product

Send a product description and get back the right tax category with a confidence score.

Payroll calculator

GET/payroll

Federal and provincial tax, CPP or QPP, and EI for an annual salary or a single pay cheque in any province, with net pay and the employer's total cost. Per period runs take year to date amounts, so CPP and EI stop at the yearly maximums.

Statutory holidays

GET/holidays

Statutory holidays for every province and territory and the federal government, for any year.

Business days

GET/business-days

Ask whether a date is a business day in a province, or count business days between two dates, skipping weekends and statutory holidays.

Postal code intelligence

GET/postal-code

Province, community, time zone, and census population for any Canadian postal code area.

Business number validation

GET/business-number

Check a business number and its GST/HST or payroll account format, and look the company up in the federal corporations registry.

Payroll calculator (Australia)

GET/au-payroll

PAYG withholding for one pay in Australia, calculated with the ATO Schedule 1 formulas for weekly, fortnightly, or monthly pay, with HELP debt withholding, the Medicare levy estimate, super guarantee, and the employer's total cost. Financial years 2025-26 and 2026-27.

Public holidays (Australia)

GET/au-holidays

Public holidays for every Australian state and territory and the national list, computed from the governing rules and verified against the published state lists.

Business days (Australia)

GET/au-business-days

Ask whether a date is a business day in an Australian state, add business days to a date, or count them over a range, skipping weekends and public holidays.

Postcode intelligence (Australia)

GET/au-postal-code

Suburbs, state, centroid coordinates, and time zone for any Australian postcode, from G-NAF derived open data covering more than 3,100 postcodes.

ABN validation (Australia)

GET/au-business-number

Validate an Australian business number against the live register for ABN status, entity name, and GST registration, and recognise an ACN when nine digits arrive instead.

GST categories (Australia)

GET/au-tax-categories

The Australian GST treatments explained: taxable at 10 percent, GST free with credits still claimable, and input taxed with no credits, category by category with the law for each.

Classify product (Australia)

GET/au-classify-product

Send a product or service description and get its Australian GST treatment, the rate, and whether input credits are claimable. Food is decided against the ATO Detailed Food List, item by item.