# FICA Tax Calculator

> FICA Tax Calculator is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-31).

Computes US FICA (Social Security and Medicare) tax obligations for a given wage amount, tax year, filing status, and employment type.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/tax/fica?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fica-tax-calculator-2b4ca905
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qblpgKjNzt2yLhl2GuzXi

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 fica-tax-calculator-2b4ca905
```

Example prompt: What's my total FICA tax burden for 2026 if I earned $95,000 in wages and I'm filing as single — and I'm not self-employed?

## When to prefer this

Use this endpoint when you need a quick, programmatic FICA tax computation without building your own tax-rate logic. It's particularly useful for financial planning agents, payroll tools, and tax estimation workflows where you need accurate Social Security and Medicare tax figures for a given income level, filing status, and tax year — including both W-2 employees and self-employed individuals.

## Known failure modes

- Missing required 'wages' parameter returns validation error
- Negative wages value rejected with 400-level error
- Invalid filing_status enum value returns schema validation error
- Unsupported tax_year may return an error or fall back to default
- Network or payment failure prevents response delivery

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

Returns a JSON object with computed FICA tax breakdown including Social Security tax, Medicare tax, and (if self-employed) the self-employment tax equivalent, along with a success flag and the input parameters used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "wages"
     ],
     "properties": {
      "wages": {
       "type": "number",
       "default": null,
       "description": "Annual wages or net self-employment earnings (>= 0)"
      },
      "tax_year": {
       "type": "integer",
       "default": null,
       "description": "Tax year, default 2026"
      },
      "filing_status": {
       "enum": [
        "single",
        "married_jointly",
        "married_separately",
        "head_of_household"
       ],
       "type": "string",
       "default": null,
       "description": "Filing status, default single"
      },
      "self_employed": {
       "type": "boolean",
       "default": null,
       "description": "True computes self-employment tax, default false"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fica-tax-calculator-2b4ca905/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)