# Freelancer Invoice Total Calculator

> Freelancer Invoice Total Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Calculates a line-item subtotal, applies a user-supplied tax rate, and returns the final invoice total — optimized for freelancer billing workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/invoice-total-freelancer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/freelancer-invoice-total-calculator-76c6c683
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7Ro6LWSGi11FqP1nGQ_hp

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

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability freelancer-invoice-total-calculator-76c6c683 -d '<json body>'
```

Example prompt: Can you calculate my freelance invoice total? I have two line items: 2 units at $12.50 each and 1 unit at $8.00, and I need to apply a 10% tax rate.

## When to prefer this

Choose this endpoint when you need a quick, structured computation of invoice totals specifically for freelance billing scenarios — particularly when you have multiple line items with varying quantities and prices and need tax applied at a flat rate. It is ideal for agents automating freelance invoicing workflows, generating client-ready totals, or verifying billing math without building custom logic.

## Known failure modes

- Missing or empty items array — calculation cannot proceed without at least one line item
- Negative quantity or unit_price values — may produce incorrect or negative subtotals
- Tax rate outside reasonable bounds (e.g. >100%) — accepted but produces unintuitive results
- Malformed item objects missing quantity or unit_price fields — may result in NaN or zero values
- Non-numeric tax_rate_percent — likely causes a validation or computation error

## How this service works

Freelancer Invoice total calculator: Calculate a line-item subtotal, user-supplied tax rate, and total. Tailored for freelancer workflows.

## Output

Returns a computed breakdown including the line-item subtotal (sum of quantity × unit_price for each item), the calculated tax amount based on the supplied tax_rate_percent, and the final total (subtotal + tax). Enables freelancers to produce accurate client-facing invoice amounts without manual math.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "items": {
   "type": "array",
   "items": {
    "type": "object"
   },
   "default": [
    {
     "quantity": 2,
     "unit_price": 12.5
    },
    {
     "quantity": 1,
     "unit_price": 8
    }
   ]
  },
  "tax_rate_percent": {
   "type": "number",
   "default": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/freelancer-invoice-total-calculator-76c6c683/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)