API Documentation — CapBlinker

Overview

CapBlinker is built for automation scripts that need a simple, fast and predictable CAPTCHA solving API.

Supported now

3-digit image CAPTCHA recognition.
Base64 image input through JSON.
Average solve time around 0.10–0.15 seconds.

Pricing

$0.10 per 1000 successful solves.
$0.0001 per solved CAPTCHA.
New users receive $0.10 free trial balance.

Authentication

Every request must include your API key inside the Authorization header.

Header Example

Authorization: Bearer YOUR_API_KEY
Accept: application/json
Content-Type: application/json

You can find your API key in your dashboard after registration.

Solve Request

Send a base64 encoded CAPTCHA image to the solve endpoint and receive the recognized number.

POST

https://capblinker.com/api/solve

JSON Request Body

{
  "image": "base64_encoded_image_here"
}

You can send plain base64 or a full data:image/png;base64 string. Both formats are accepted.

Response Example

Successful requests return the detected CAPTCHA answer, solving time, task ID and request cost.

Success Response

{
  "success": true,
  "task_id": 1428,
  "answer": "726",
  "cost": 0.0001,
  "solve_time": "0.12s"
}

Error Responses

The API returns JSON error messages for invalid requests, insufficient balance or solver failures.

401 Unauthorized

{
  "success": false,
  "message": "Invalid API key."
}

402 Payment Required

{
  "success": false,
  "message": "Insufficient balance."
}

422 Validation Error

{
  "success": false,
  "message": "Invalid base64 image."
}

422 Solver Error

{
  "success": false,
  "message": "Captcha solving failed.",
  "task_id": 1428
}

Code Examples

Copy-ready examples for integrating CapBlinker into automation scripts, bots and backend systems.

PHP / Laravel

$base64 = base64_encode(
    file_get_contents('captcha.png')
);

$response = Http::withHeaders([
    'Authorization' => 'Bearer YOUR_API_KEY',
    'Accept' => 'application/json',
])->post('https://capblinker.com/api/solve', [
    'image' => $base64,
]);

$data = $response->json();

if ($data['success']) {
    echo $data['answer'];
}

JavaScript

const imageBase64 = 'base64_encoded_image_here';

fetch('https://capblinker.com/api/solve', {
    method: 'POST',
    headers: {
        'Authorization': 'Bearer YOUR_API_KEY',
        'Accept': 'application/json',
        'Content-Type': 'application/json'
    },
    body: JSON.stringify({
        image: imageBase64
    })
})
.then(response => response.json())
.then(data => {
    if (data.success) {
        console.log(data.answer);
    }
});

Python

import base64
import requests

API_KEY = 'YOUR_API_KEY'

with open('captcha.png', 'rb') as f:
    image_base64 = base64.b64encode(f.read()).decode()

response = requests.post(
    'https://capblinker.com/api/solve',
    headers={
        'Authorization': f'Bearer {API_KEY}',
        'Accept': 'application/json',
    },
    json={
        'image': image_base64
    },
    timeout=30
)

data = response.json()

if data.get('success'):
    print(data['answer'])

cURL

curl -X POST https://capblinker.com/api/solve \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{"image":"base64_encoded_image_here"}'

Simple CAPTCHA solver API.