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24K Labs Sales Tax & VAT Calculator
x402
24K Labs Sales Tax & VAT Calculator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Calculates sales tax or VAT for a given net amount, returning the tax amount, gross total, and applicable rate percentage.
Price / call$0.003
Success—
StatusUnknown
How this service works
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Output
A JSON object containing the original net amount, the calculated tax amount, the gross total (net + tax), and the tax rate as a percentage (e.g. {"net":100,"tax":20,"gross":120,"rate_pct":20}).
Example use cases
E-commerce checkout tax display
“I need to show a customer their total before checkout — the cart subtotal is $89.99 and I need to add 8.5% sales tax. What are the net, tax amount, and gross total?”
EU VAT invoice line item
“Generate a VAT breakdown for an invoice line item with a net price of €500 at the standard 20% UK VAT rate — I need the tax amount and gross total to put on the invoice.”
SaaS pricing page tax estimate
“A user in Germany wants to know what they'll actually pay for a $49 subscription — calculate the gross price including 19% German VAT and show me the tax amount separately.”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/sales-tax-vat-calculatorWhen to prefer
Use this endpoint when you need a quick, reliable computation of tax-inclusive pricing for invoices, checkout flows, or financial summaries and you want a structured JSON response with net, tax, and gross fields. Prefer this over building the arithmetic inline when you need auditable, consistent tax calculations in an agent workflow, especially when chaining with invoice generation or payment processing steps.
Side effects
- Missing or invalid net amount returns an error
- Invalid or missing tax rate causes calculation failure
- Non-numeric inputs rejected with validation error
- Negative net amounts may return an error or unexpected results
- Rate expressed as decimal vs percentage may cause incorrect output if format is mismatched
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mode | string | |
| amount | number | |
| region | string |
Output
Schema · Response
{
"type": "json",
"example": {
"net": 100,
"tax": 20,
"gross": 120,
"rate_pct": 20
}
}Tags
x402
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