# x402toll.com Tax Estimate

> x402toll.com Tax Estimate is a paid API for AI agents from x402toll.com, paid per call via x402, $1/call, status unknown (last checked 2026-09-14).

Calculates a comprehensive 2026 US tax estimate in one call, covering federal income tax, self-employment tax, employee FICA, and state income tax, with full component breakdown, effective/marginal rates, and after-tax income.

## Facts

- Endpoint: POST https://x402toll.com/v1/reports/tax-estimate
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402toll-com-tax-estimate-ed765e66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pz0eU1ttwe08T465aeMra

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 x402toll-com-tax-estimate-ed765e66 -d '<json body>'
```

Example prompt: Can you estimate my total 2026 tax bill? I'm a single filer in California with $90,000 in wages and $30,000 in self-employment income, taking the standard deduction, with no credits or adjustments — I need the federal, self-employment, FICA, and state income tax broken out with my effective and marginal rates.

## When to prefer this

Use this endpoint when you need a single-call comprehensive US tax estimate for 2026 that covers all major tax components — federal income, SE tax, FICA, and state — with breakdown and rate data. Prefer this over generic tax calculators when you need structured JSON output with component-level detail suitable for downstream financial planning, or when you need to handle mixed income types (wages + self-employment + other) in one shot.

## Known failure modes

- Invalid state code returns an error — must be a valid 2-letter US state abbreviation or DC
- Invalid filing status (only 'single' or 'mfj' accepted)
- Invalid deduction type (only 'standard' or 'itemized' accepted)
- Negative income or deduction values may produce unexpected results
- Payment failure (x402 protocol) if USDC balance is insufficient or wallet not configured
- Missing required fields may return a validation error

## How this service works

Full 2026 tax estimate in one call: federal income tax + self-employment tax + employee FICA + state income tax, from wages, self-employment income, and other income — with the component breakdown, effective and marginal rates, and after-tax income.

## Output

Returns a full 2026 tax estimate with itemized components: federal income tax, self-employment tax, employee FICA, and state income tax amounts; effective and marginal tax rates; and after-tax (net) income — all computed from the provided wages, self-employment income, other income, filing status, state, deduction type, adjustments, and credits.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "state": {
   "type": "string",
   "default": "TX"
  },
  "wages": {
   "type": "number",
   "default": 0
  },
  "credits": {
   "type": "number",
   "default": 0
  },
  "adjustments": {
   "type": "number",
   "default": 0
  },
  "filingStatus": {
   "enum": [
    "single",
    "mfj"
   ],
   "type": "string",
   "default": "single"
  },
  "deductionType": {
   "enum": [
    "standard",
    "itemized"
   ],
   "type": "string",
   "default": "standard"
  },
  "itemizedDeductions": {
   "type": "number",
   "default": 0
  },
  "otherOrdinaryIncome": {
   "type": "number",
   "default": 0
  },
  "selfEmploymentIncome": {
   "type": "number",
   "default": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402toll-com-tax-estimate-ed765e66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402toll.com](https://www.zero.xyz/host/x402toll.com/llms.txt)