# Billable Utilization Calculator API

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

Calculate billable utilization, target gap, revenue and gross margin for a work period.

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

- Slug: `billable-utilization-calculator`
- Category: `business`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/billable-utilization-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `available_hours` | `float` | no | total workable hours in the period |
| `billable_hours` | `float` | no | client-billable hours in the period |
| `target_percent` | `float` | no | target utilization percent |
| `billing_rate` | `float` | no | optional revenue per billable hour |
| `labor_cost` | `float` | no | optional labor cost per available hour |

## Example request

```json
{
  "available_hours": 160,
  "billable_hours": 120,
  "target_percent": 75,
  "billing_rate": 150,
  "labor_cost": 60
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/billable-utilization-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"available_hours":160,"billable_hours":120,"target_percent":75,"billing_rate":150,"labor_cost":60}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "billable-utilization-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "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 Billable Utilization Calculator API do?

Calculate billable utilization, target gap, revenue and gross margin for a work period. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

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