Coin Flipper API
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
https://api.apiverve.com/v1/coinflipperCode Examples
Here are examples of how to call the Coin Flipper API in different programming languages:
curl -X GET \
"https://api.apiverve.com/v1/coinflipper?flips=10" \
-H "X-API-Key: your_api_key_here"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);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)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
$ch = curl_init();
curl_setopt($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);
?>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))
}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))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:
X-API-Key: your_api_key_hereInteractive 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:
Flip Coins
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
flipsPremium | integer | optional | Number of coins to flip Range: 1 - 10000 |
Response
The Coin Flipper API returns responses in JSON, XML, YAML, and CSV formats:
Example Responses
{
"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 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>
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
| key | value |
|---|---|
| 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 |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains 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:
| Field | Type | Sample Value | Description |
|---|---|---|---|
total_flips | number | Total number of coin flips performed in simulation | |
flips | array | Array of individual flip results as Heads or Tails | |
heads_count | number | Total count of heads outcomes from all flips | |
tails_count | number | Total count of tails outcomes from all flips | |
heads_percentagePremium | number | Percentage of heads outcomes as decimal | |
tails_percentagePremium | number | Percentage of tails outcomes as decimal | |
longest_streak | object | - | |
â”” lengthPremium | number | Length of longest consecutive streak in results | |
â”” typePremium | string | Outcome type of longest streak (Heads or Tails) | |
first_flip | string | Result of the first coin flip performed | |
last_flip | string | Result of the last coin flip performed | |
is_fairPremium | boolean | Statistical indicator of fair coin flip distribution |
Headers
Required and optional headers for Coin Flipper API requests:
| Header Name | Required | Example Value | Description |
|---|---|---|---|
X-API-Key | required | your_api_key_here | Your APIVerve API key. Found in your dashboard under API Keys. |
Accept | optional | application/json | Specify response format: application/json (default), application/xml, or application/yaml |
User-Agent | optional | MyApp/1.0 | Identifies your application for analytics and debugging purposes |
X-Request-ID | optional | req_123456789 | Custom request identifier for tracking and debugging requests |
Cache-Control | optional | no-cache | Control caching behavior for the request and response |
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.
Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.
POST https://api.apiverve.com/v1/graphqlquery {
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 Header | Value | Description |
|---|---|---|
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.
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.
| Plan | Rate Limit | Description |
|---|---|---|
| Free | 5 requests/min | Hard rate limit enforced - exceeding will return 429 errors |
| Starter | No Limit | Production ready - standard traffic priority |
| Pro | No Limit | Production ready - preferred traffic priority |
| Mega | No Limit | Production 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:
| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum number of requests allowed per time window |
X-RateLimit-Remaining | Number of requests remaining in the current window |
X-RateLimit-Reset | Unix 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:
| Code | Message | Description | Solution |
|---|---|---|---|
200 | OK | Request successful, data returned | No action needed - request was successful |
400 | Bad Request | Invalid request parameters or malformed request | Check required parameters and ensure values match expected formats |
401 | Unauthorized | Missing or invalid API key | Include x-api-key header with valid API key from dashboard |
403 | Forbidden | API key lacks permission or insufficient credits | Check credit balance in dashboard or upgrade plan |
429 | Too Many Requests | Rate limit exceeded (Free: 5 req/min) | Implement request throttling or upgrade to paid plan |
500 | Internal Server Error | Server error occurred | Retry request after a few seconds, contact support if persists |
503 | Service Unavailable | API temporarily unavailable | Wait 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?
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?
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.



