# Sharpe Ratio Calculator API

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

Sharpe ratio from summary statistics or a series of periodic returns (annualized), with performance rating.

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

- Slug: `sharpe-ratio-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/sharpe-ratio-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/sharpe-ratio-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `mode` | `str` | no | simple | returns Choices: simple, returns |
| `portfolio_return_pct` | `float | None` | no |  |
| `risk_free_rate_pct` | `float | None` | no |  |
| `std_deviation_pct` | `float | None` | no |  |
| `returns` | `str | None` | no | Periodic returns in percent, comma/space/newline separated (returns mode) |
| `period` | `str` | no | monthly | quarterly | annual Choices: monthly, quarterly, annual |
| `precision` | `int` | no |  |

## Example request

```json
{
  "mode": "simple",
  "portfolio_return_pct": 12.5,
  "risk_free_rate_pct": 4.5,
  "std_deviation_pct": 18
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/sharpe-ratio-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"mode":"simple","portfolio_return_pct":12.5,"risk_free_rate_pct":4.5,"std_deviation_pct":18}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "sharpe-ratio-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 Sharpe Ratio Calculator API do?

Sharpe ratio from summary statistics or a series of periodic returns (annualized), with performance rating. 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: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

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