# Numora Tax Computation API

> Numora Tax Computation API is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Computes progressive tax liability given income and tax brackets, returning the total tax owed and effective tax rate

## Facts

- Endpoint: POST https://numomo.vercel.app/api/financial/tax
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-tax-computation-api-fd1794c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vuYhbD1wnRU0kFsBPKhdU

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 numora-tax-computation-api-fd1794c0 -d '<json body>'
```

Example prompt: Calculate the tax owed on a $95,000 income using US federal 2024 brackets: 10% up to $11,600, 12% from $11,600 to $47,150, 22% from $47,150 to $100,525.

## When to prefer this

Choose this endpoint when you need a fast, self-contained, server-side progressive tax computation without relying on external tax databases or jurisdiction-specific APIs. It is ideal for custom bracket structures, hypothetical tax scenarios, financial planning tools, or when you want pure deterministic math with no external dependencies. Prefer it over full tax-filing APIs when you only need the computation, not filing or compliance workflows.

## Known failure modes

- Missing required field 'income' returns a validation error
- Missing or malformed 'brackets' array causes a 400-level error
- Non-numeric income value causes schema validation failure
- Empty brackets array may return zero tax or an error
- Payment failure via x402 micropayment returns a 402 Payment Required response

## How this service works

100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.

## Output

Returns a JSON object with success flag, a result object containing total tax owed, effective tax rate, and a per-bracket breakdown, plus a human-readable computation string describing what was calculated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "income",
  "brackets"
 ],
 "properties": {
  "income": {
   "type": "number"
  },
  "brackets": {
   "type": "array"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success",
  "result",
  "computation"
 ],
 "properties": {
  "result": {
   "type": "object",
   "description": "Computation result varies by endpoint"
  },
  "success": {
   "type": "boolean",
   "description": "Always true on success"
  },
  "computation": {
   "type": "string",
   "description": "Human-readable description of what was computed"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numora-tax-computation-api-fd1794c0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numomo.vercel.app](https://www.zero.xyz/host/numomo.vercel.app/llms.txt)