Coin FlipperCoin Flipper API

OnlineCredit Usage:1 per callRefreshed 1 month ago
avg: 104ms|p50: 100ms|p75: 106ms|p90: 114ms|p99: 129ms

Coin Flipper is a tool for simulating coin flips. It can flip multiple coins at once and provides statistics including heads/tails counts, percentages, streaks, and fairness analysis for probability experiments and gaming.

The Coin Flipper API provides reliable and fast access to coin flipper data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.

To use Coin Flipper, you need an API key. You can get one by creating a free account and visiting your dashboard.

GET Endpoint

URL
https://api.apiverve.com/v1/coinflipper

Code Examples

Here are examples of how to call the Coin Flipper API in different programming languages:

cURL Request
curl -X GET \
  "https://api.apiverve.com/v1/coinflipper?flips=10" \
  -H "X-API-Key: your_api_key_here"
JavaScript (Fetch API)
const response = await fetch('https://api.apiverve.com/v1/coinflipper?flips=10', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);
Python (Requests)
import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/coinflipper?flips=10', headers=headers)

data = response.json()
print(data)
Node.js (Native HTTPS)
const https = require('https');
const url = require('url');

const options = {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
};

const req = https.request('https://api.apiverve.com/v1/coinflipper?flips=10', options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(JSON.parse(data)));
});

req.end();
PHP (cURL)
<?php

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/coinflipper?flips=10');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-API-Key: your_api_key_here',
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

?>
Go (net/http)
package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/coinflipper?flips=10", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}
Ruby (Net::HTTP)
require 'net/http'
require 'json'

uri = URI('https://api.apiverve.com/v1/coinflipper?flips=10')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'

response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))
C# (HttpClient)
using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");

        var response = await client.GetAsync("https://api.apiverve.com/v1/coinflipper?flips=10");
        response.EnsureSuccessStatusCode();

        var responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
    }
}

Authentication

The Coin Flipper API requires authentication via API key. Include your API key in the request header:

Required Header
X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Coin Flipper API directly in your browser with live requests and responses.

Parameters

The following parameters are available for the Coin Flipper API:

Some Coin Flipper parameters marked with Premium are available exclusively on paid plans.View pricing

Flip Coins

ParameterTypeRequiredDescriptionDefaultExample
flipsPremiumintegeroptional
Number of coins to flip
Range: 1 - 10000
110

Response

The Coin Flipper API returns responses in JSON, XML, YAML, and CSV formats:

Example Responses

JSON Response
200 OK
{
  "status": "ok",
  "error": null,
  "data": {
    "total_flips": 10,
    "flips": [
      "Tails",
      "Heads",
      "Heads",
      "Tails",
      "Tails",
      "Heads",
      "Tails",
      "Tails",
      "Tails",
      "Tails"
    ],
    "heads_count": 3,
    "tails_count": 7,
    "heads_percentage": 30,
    "tails_percentage": 70,
    "longest_streak": {
      "length": 4,
      "type": "Tails"
    },
    "first_flip": "Tails",
    "last_flip": "Tails",
    "is_fair": false
  }
}
XML Response
200 OK
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <total_flips>10</total_flips>
    <flips>
      <flip>Tails</flip>
      <flip>Heads</flip>
      <flip>Heads</flip>
      <flip>Tails</flip>
      <flip>Tails</flip>
      <flip>Heads</flip>
      <flip>Tails</flip>
      <flip>Tails</flip>
      <flip>Tails</flip>
      <flip>Tails</flip>
    </flips>
    <heads_count>3</heads_count>
    <tails_count>7</tails_count>
    <heads_percentage>30</heads_percentage>
    <tails_percentage>70</tails_percentage>
    <longest_streak>
      <length>4</length>
      <type>Tails</type>
    </longest_streak>
    <first_flip>Tails</first_flip>
    <last_flip>Tails</last_flip>
    <is_fair>false</is_fair>
  </data>
</response>
YAML Response
200 OK
status: ok
error: null
data:
  total_flips: 10
  flips:
    - Tails
    - Heads
    - Heads
    - Tails
    - Tails
    - Heads
    - Tails
    - Tails
    - Tails
    - Tails
  heads_count: 3
  tails_count: 7
  heads_percentage: 30
  tails_percentage: 70
  longest_streak:
    length: 4
    type: Tails
  first_flip: Tails
  last_flip: Tails
  is_fair: false
CSV Response
200 OK
keyvalue
total_flips10
flips[Tails,Heads,Heads,Tails,Tails,Heads,Tails,Tails,Tails,Tails]
heads_count3
tails_count7
heads_percentage30
tails_percentage70
longest_streak{length:4,type:Tails}
first_flipTails
last_flipTails
is_fairfalse

Response Structure

All API responses follow a consistent structure with the following fields:

FieldTypeDescriptionExample
statusstringIndicates whether the request was successful ("ok") or failed ("error")ok
errorstring | nullContains error message if status is "error", otherwise nullnull
dataobject | nullContains the API response data if successful, otherwise null{...}

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Response fields marked with Premium are available exclusively on paid plans.View pricing
FieldTypeSample ValueDescription
total_flipsnumber10Total number of coin flips performed in simulation
flipsarray["Tails", ...]Array of individual flip results as Heads or Tails
heads_countnumber3Total count of heads outcomes from all flips
tails_countnumber7Total count of tails outcomes from all flips
heads_percentagePremiumnumber30Percentage of heads outcomes as decimal
tails_percentagePremiumnumber70Percentage of tails outcomes as decimal
longest_streakobject{...}-
â”” lengthPremiumnumber4Length of longest consecutive streak in results
â”” typePremiumstring"Tails"Outcome type of longest streak (Heads or Tails)
first_flipstring"Tails"Result of the first coin flip performed
last_flipstring"Tails"Result of the last coin flip performed
is_fairPremiumbooleanfalseStatistical indicator of fair coin flip distribution

Headers

Required and optional headers for Coin Flipper API requests:

Header NameRequiredExample ValueDescription
X-API-Keyrequiredyour_api_key_hereYour APIVerve API key. Found in your dashboard under API Keys.
Acceptoptionalapplication/jsonSpecify response format: application/json (default), application/xml, or application/yaml
User-AgentoptionalMyApp/1.0Identifies your application for analytics and debugging purposes
X-Request-IDoptionalreq_123456789Custom request identifier for tracking and debugging requests
Cache-Controloptionalno-cacheControl caching behavior for the request and response

Learn more about request headers →

GraphQL AccessALPHA

Access Coin Flipper through GraphQL to combine it with other API calls in a single request. Query only the coin flipper data you need with precise field selection, and orchestrate complex data fetching workflows.

Test Coin Flipper in the GraphQL Explorer to confirm availability and experiment with queries.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

GraphQL Endpoint
POST https://api.apiverve.com/v1/graphql
GraphQL Query Example
query {
  coinflipper(
    input: {
      flips: 10
    }
  ) {
    total_flips
    flips
    heads_count
    tails_count
    heads_percentage
    tails_percentage
    longest_streak {
      length
      type
    }
    first_flip
    last_flip
    is_fair
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The Coin Flipper API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Coin Flipper directly from browser-based applications without proxy servers.

CORS HeaderValueDescription
Access-Control-Allow-Origin*Accepts requests from any origin
Access-Control-Allow-Methods*Accepts any HTTP method
Access-Control-Allow-Headers*Accepts any request headers

Browser Usage: You can call Coin Flipper directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.

Learn more about CORS support →

Rate Limiting

Coin Flipper API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Coin Flipper users.

PlanRate LimitDescription
Free5 requests/minHard rate limit enforced - exceeding will return 429 errors
StarterNo LimitProduction ready - standard traffic priority
ProNo LimitProduction ready - preferred traffic priority
MegaNo LimitProduction ready - highest traffic priority

Learn more about rate limiting →

Rate Limit Headers

When rate limits apply, each Coin Flipper response includes headers to help you track your usage:

HeaderDescription
X-RateLimit-LimitMaximum number of requests allowed per time window
X-RateLimit-RemainingNumber of requests remaining in the current window
X-RateLimit-ResetUnix timestamp when the rate limit window resets

Handling Rate Limits

Free Plan: When you exceed your rate limit, Coin Flipper returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.

Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.

Best Practices for Coin Flipper:

  • Monitor the rate limit headers to track your Coin Flipper usage (Free plan only)
  • Cache coin flipper responses where appropriate to reduce API calls
  • Upgrade to Pro or Mega for guaranteed no-throttle Coin Flipper performance

Note: Coin Flipper rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Coin Flipper on Free tier.

Error Codes

The Coin Flipper API uses standard HTTP status codes to indicate success or failure:

CodeMessageDescriptionSolution
200OKRequest successful, data returnedNo action needed - request was successful
400Bad RequestInvalid request parameters or malformed requestCheck required parameters and ensure values match expected formats
401UnauthorizedMissing or invalid API keyInclude x-api-key header with valid API key from dashboard
403ForbiddenAPI key lacks permission or insufficient creditsCheck credit balance in dashboard or upgrade plan
429Too Many RequestsRate limit exceeded (Free: 5 req/min)Implement request throttling or upgrade to paid plan
500Internal Server ErrorServer error occurredRetry request after a few seconds, contact support if persists
503Service UnavailableAPI temporarily unavailableWait and retry, check status page for maintenance updates

Learn more about error handling →

Need help? Contact support with your X-Request-ID for assistance.

Integrate Coin Flipper with SDKs

Get started quickly with official Coin Flipper SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.

Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.

Integrate Coin Flipper with No-Code API Tools

Connect the Coin Flipper API to your favorite automation platform without writing code. Build workflows that leverage coin flipper data across thousands of apps.

All platforms use your same API key to access Coin Flipper. Visit our integrations hub for step-by-step setup guides.

Frequently Asked Questions

How do I get an API key for Coin Flipper?
Sign up for a free account at dashboard.apiverve.com. Your API key will be automatically generated and available in your dashboard. The same key works for Coin Flipper and all other APIVerve APIs. The free plan includes 1,000 credits plus a 500 credit bonus.
How many credits does Coin Flipper cost?

Each successful Coin Flipper API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful coin flipper lookups.

Can I use Coin Flipper in production?

The free plan is for testing and development only. For production use of Coin Flipper, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.

Can I use Coin Flipper from a browser?
Yes! The Coin Flipper API supports CORS with wildcard configuration, so you can call it directly from browser-based JavaScript without needing a proxy server. See the CORS section above for details.
What happens if I exceed my Coin Flipper credit limit?

When you reach your monthly credit limit, Coin Flipper API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.

What's Next?

Continue your journey with these recommended resources

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