# On Base Percentage Calculator API

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

Calculate on-base percentage with batting average and optional OPS.

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

- Slug: `on-base-percentage-calculator`
- Category: `sports`
- 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
- Browser tool: https://miniwebtool.com/on-base-percentage-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/on-base-percentage-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `hits` | `int` | no |  |
| `walks` | `int` | no |  |
| `hit_by_pitch` | `int` | no |  |
| `at_bats` | `int` | no |  |
| `sacrifice_flies` | `int` | no |  |
| `total_bases` | `int | None` | no |  |
| `precision` | `int` | no |  |

## Example request

```json
{
  "hits": 20,
  "walks": 10,
  "hit_by_pitch": 2,
  "at_bats": 100,
  "sacrifice_flies": 2,
  "total_bases": 35
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/on-base-percentage-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"hits":20,"walks":10,"hit_by_pitch":2,"at_bats":100,"sacrifice_flies":2,"total_bases":35}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "on-base-percentage-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 On Base Percentage Calculator API do?

Calculate on-base percentage with batting average and optional OPS. 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.