StatisticsCalculator.xyz

Free Online Statistical Tools

Statistics Calculator API

API Overview

Our Statistics Calculator API allows developers to integrate statistical calculations directly into their applications. The API provides endpoints for various statistical operations, including descriptive statistics, probability distributions, hypothesis testing, and more.

Base URL

https://api.statisticscalculator.xyz/v1/

Authentication

All API requests require an API key sent in the header:

Authorization: Bearer YOUR_API_KEY

Rate Limits

  • Free tier: 100 requests per hour
  • Basic tier: 1,000 requests per hour
  • Pro tier: 10,000 requests per hour

Response Format

All responses are in JSON format and include:

  • success: boolean indicating success/failure
  • data: the requested data or results
  • error: error message if success is false

API Endpoints

Descriptive Statistics

POST /descriptive

Request body: 

{
    "data": [array of numbers],
    "options": {
        "precision": 4
    }
}

Normal Distribution

POST /normal

Request body: 

{
    "mean": 0,
    "std_dev": 1,
    "x": 1.96,
    "type": "cdf" // "cdf", "pdf", or "inv"
}

t-Test

POST /ttest

Request body: 

{
    "sample_mean": 102.5,
    "pop_mean": 100,
    "sample_std_dev": 15,
    "sample_size": 25,
    "alpha": 0.05,
    "alternative": "two-sided" // "two-sided", "less", or "greater"
}

Example Response

{
    "success": true,
    "data": {
        "test_statistic": 2.0412,
        "p_value": 0.0253,
        "reject_null": true,
        "confidence_interval": [100.32, 104.68]
    }
}

Getting Started

  1. Sign up for an API key
  2. Review the documentation for your desired endpoint
  3. Make requests to the API with your key
  4. Handle the JSON responses in your application

Code Examples

Python

import requests

url = "https://api.statisticscalculator.xyz/v1/descriptive"
headers = {"Authorization": "Bearer YOUR_API_KEY"}
data = {
    "data": [12, 15, 18, 22, 25, 28, 28, 30],
    "options": {"precision": 4}
}

response = requests.post(url, json=data, headers=headers)
print(response.json())

JavaScript

fetch("https://api.statisticscalculator.xyz/v1/descriptive", {
    method: "POST",
    headers: {
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json"
    },
    body: JSON.stringify({
        data: [12, 15, 18, 22, 25, 28, 28, 30],
        options: {precision: 4}
    })
})
.then(response => response.json())
.then(data => console.log(data));

API Status

All systems operational

Last updated: 2025-06-16 11:04:38

Support

For API support, please contact:

contact@statisticscalculator.xyz