Permutation & Combination Calculator

Permutation & Combination Calculator API

Math/CalculationsIncluded in Subscription

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

Online
1 credit/call
99.9% uptime
Docs
avg: 123ms|p50: 119ms|p75: 126ms|p90: 135ms|p99: 153ms
Start for Free
Online
1 credit/call
99.9% uptime
Docs
avg: 123ms|p50: 119ms|p90: 135ms|p99: 153ms

Live Test API

Try out the Permutation & Combination Calculator with a live request and see the response in real-time.

API Request

GET
https://api.apiverve.com
Parameters

API Response

200 OK
1234567891011121314
{
  "status": "ok",
  "error": null,
  "data": {
    "n": 10,
    "r": 3,
    "permutation": 720,
    "combination": 120,
    "formulas": {
      "permutation": "P(n,r) = n! / (n-r)!",
      "combination": "C(n,r) = n! / (r! × (n-r)!)"
    }
  }
}

Multiple Access Methods

REST API with multiple response formats, GraphQL, and MCP for AI agents

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JSON

JavaScript Object Notation

XML

Extensible Markup Language

YAML

Human-readable data format

CSV

Comma-separated values

BETA

GraphQL

Query language for APIs

NEW

MCP

AI agent integration

Zero-Code Integration

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Developer SDKs

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NuGet

.NET / C#
Ready
NuGetDocs

PyPI

Python
Ready
PyPIDocs

NPM

Node.js / JavaScript
Ready
NPMDocs
Need a different language?Our REST API works with any programming language. Examples available for PHP, Ruby, Go, and more.
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Frequently Asked Questions

Get answers to common questions about the Permutation & Combination Calculator API

What does the Permutation & Combination Calculator API do?

Calculate permutations (P(n,r)) and combinations (C(n,r)) for any given values of n and r. The API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.

How fast is the Permutation & Combination Calculator API?

The Permutation & Combination Calculator API has an average response time of 123ms, with a median (p50) of 119ms and 99th percentile of 153ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.

How much does the Permutation & Combination Calculator API cost?

Each call to the Permutation & Combination Calculator API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.

How do I authenticate Permutation & Combination Calculator API requests?

Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.

What HTTP methods does Permutation & Combination Calculator support?

The Permutation & Combination Calculator API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.

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