# Business Loan Calculator API

> For the complete documentation index, see [llms.txt](/llms.txt).

Estimate business loan payments, fees, payoff time, and interest.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `business-loan-calculator`
- Category: `finance`
- Version: `2026-04-22`
- Credits per successful call: 2
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/business-loan-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/business-loan-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `loan_amount` | `float` | yes |  |
| `interest_rate_percent` | `float` | yes |  |
| `loan_term_years` | `str` | no | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 15 | 20 | 25 Choices: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, 20, 25 |
| `origination_fee_percent` | `float` | no |  |
| `extra_payment` | `float` | no |  |
| `precision` | `int` | no |  |

## Example request

```json
{
  "loan_amount": 100000,
  "interest_rate_percent": 7,
  "loan_term_years": "5",
  "origination_fee_percent": 2,
  "extra_payment": 100
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/business-loan-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"loan_amount":100000,"interest_rate_percent":7,"loan_term_years":"5","origination_fee_percent":2,"extra_payment":100}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "business-loan-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 2,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Business Loan Calculator API do?

Estimate business loan payments, fees, payoff time, and interest. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

2 credits per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: loan_amount, interest_rate_percent. Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.