# calculateIncomeTax

Calculates income tax for the United States or Canada from income, location, and filing status, including state or provincial tax. Requires country, region, income.

Agent View of the PolicyLayer registry record for `calculateIncomeTax`. HTML page: https://policylayer.com/tools/com-api-ninjas-mcp/calculateincometax

## Facts

- Tool: `calculateIncomeTax`
- Server: API Ninjas (`https://mcp.api-ninjas.com/mcp`) — https://policylayer.com/tools/com-api-ninjas-mcp.md
- Homepage: https://github.com/https://mcp.api-ninjas.com/mcp
- Risk category: Read (Low risk)
- Registry record: grade D, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 8 (3 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `income` | integer | yes | Annual income amount |
| `region` | string | yes | State/province code (e.g., CA, NY, ON) |
| `country` | string | yes | 2-letter country code (e.g., US, CA) |
| `credits` | integer | no | Total tax credits amount |
| `tax_year` | string | no | Tax year in YYYY format (e.g., 2024). If not specified, the latest year will be used. |
| `deductions` | integer | no | Total tax deductions amount |
| `filing_status` | string | no | Tax filing status. Possible values: single, married (married filing jointly), married_separate (married filing separately), or head_of_household |
| `self_employed` | boolean | no | Set to true for self-employed tax calculations (US only) |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "calculateIncomeTax",
    "arguments": {
      "income": 0,
      "region": "<region>",
      "country": "<country>"
    }
  }
}
```

## Why calculateIncomeTax is rated Low

Even though calculateIncomeTax only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

## Use case

AI agents call calculateIncomeTax to retrieve information from API Ninjas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches API Ninjas:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "calculateIncomeTax": {}
  }
}
```

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- `calculateSalesTax` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/calculatesalestax.md
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- `extractTextFromImage` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/extracttextfromimage.md
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- `getAirports` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/getairports.md
- `getAirportsList` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/getairportslist.md
- `getAirQuality` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/getairquality.md
- `getAllCatNames` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/getallcatnames.md
- `getAllCountries` — Read — https://policylayer.com/tools/com-api-ninjas-mcp/getallcountries.md
- …and 213 more: https://policylayer.com/tools/com-api-ninjas-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-api-ninjas-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-api-ninjas-mcp