Permutation & Combination Calculator API

Calculate permutations (P(n,r)) and combinations (C(n,r)) for any given values of n and r.

The Permutation & Combination Calculator API provides a simple, reliable way to integrate permutation & combination calculator functionality into your applications. Built for developers who need production-ready permutation & combination calculator capabilities without the complexity of building from scratch.

View API Details →

Available on:

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Quick Start

Using JavaScript

async function callPermutation&CombinationCalculatorAPI() {
    try {
        const response = await fetch('https://api.apiverve.com/v1/permutationcombination', {
            method: 'GET',
            headers: {
                'x-api-key': 'YOUR_API_KEY_HERE'
            }
        });

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

callPermutation&CombinationCalculatorAPI();

Using cURL

curl -X GET "https://api.apiverve.com/v1/permutationcombination?param=value" \
  -H "x-api-key: YOUR_API_KEY_HERE"

Get your API key: https://apiverve.com

📁 For more examples, see the examples folder

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Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/permutationcombination

View NPM Package → | Package Code →

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🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.Permutation&CombinationCalculator

View NuGet Package → | Package Code →

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🐍 Python (PyPI)

pip install apiverve-permutationcombination

View PyPI Package → | Package Code →

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💎 Ruby (RubyGems)

gem install apiverve_permutationcombination

View RubyGems Package → | Package Code →

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🐘 PHP (Packagist)

composer require apiverve/permutationcombination

View Packagist Package → | Package Code →

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🎯 Dart (pub.dev)

dart pub add apiverve_permutationcombination

View pub.dev Package → | Package Code →

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🤖 Android (JitPack)

implementation 'com.github.apiverve:permutationcombination-api:1.0.0'

Package Code →

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🐹 Go

go get github.com/apiverve/permutationcombination-api/go

Package Code →

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Why Use This API?

Feature	Benefit
Multi-language SDKs	Native packages for JavaScript, Python, C#, Go, and Android
Simple Integration	Single API key authentication, consistent response format
Production Ready	99.9% uptime, fast response times, used by thousands of developers
Comprehensive Docs	Full examples, OpenAPI spec, and dedicated support

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Documentation

• 🏠 API Home: Permutation & Combination Calculator API
• 📚 API Reference: docs.apiverve.com/ref/permutationcombination
• 📖 OpenAPI Spec: openapi.yaml
• 💡 Examples: examples/

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What Can You Build?

The Permutation & Combination Calculator API is commonly used for:

• Web Applications - Add permutation & combination calculator features to your frontend or backend
• Mobile Apps - Native SDKs for iOS and Android development
• Automation - Integrate with n8n, Zapier, or custom workflows
• SaaS Products - Enhance your product with permutation & combination calculator capabilities
• Data Pipelines - Process and analyze data at scale

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API Reference

Authentication

All requests require an API key in the header:

x-api-key: YOUR_API_KEY_HERE

Get your API key: https://apiverve.com

Response Format

All responses are JSON with this structure:

{
  "status": "ok",
  "data": { ... }
}

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Support & Community

• 🏠 API Home: Permutation & Combination Calculator API
• 💬 Support: https://apiverve.com/contact
• 🐛 Issues: GitHub Issues
• 📖 Documentation: https://docs.apiverve.com
• 🌐 Website: https://apiverve.com

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Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

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Security

For security concerns, please review our Security Policy.

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License

This project is licensed under the MIT License - see the LICENSE file for details.

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Acknowledgments

Built with ❤️ by APIVerve

Copyright © 2026 APIVerve. All rights reserved.