12/23/2025

Bypassing the Slide Programmatic Captcha Resolution

How to handle TikTok's slider captchas using ZOCAILMINE's resolve-captcha endpoint.

Introduction

One of the biggest blockers in scraping is the "Slider Captcha." When automated systems interact with TikTok, they are often presented with a puzzle piece that must be slid into place.

While most of our endpoints handle this internally, there are edge cases where you might need to solve a specific challenge. ZOCAILMINE offers a resolve-captcha endpoint specifically for this utility.

Concept: Image-Based Resolution

The logic requires two inputs:

  1. Image 1: The background image (the puzzle).
  2. Image 2: The slider piece.

The API processes these images and calculates the exact X/Y coordinates and trajectory needed to solve the puzzle, returning the solution payload.

The Problem vs. The Solution

MethodApproachDrawback
ManualHuman interventionCannot scale
HeuristicsSimple CV/Edge detectionHigh failure rate on modern captchas
ZOCAILMINEAI/ML ModelHigh accuracy, API-based

Code Example: Preparing the Payload

As seen in useTikTokApi.ts, files must be converted to Base64 before sending.

// Helper to convert File to Base64
const fileToBase64 = (file: File): Promise<string> =>
  new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result as string);
    reader.onerror = () => reject(new Error('Failed to read file'));
  });

// The execution logic
async function solveCaptcha(bgImage: File, pieceImage: File, apiKey: string) {
  const base64Bg = await fileToBase64(bgImage);
  const base64Piece = await fileToBase64(pieceImage);

  const payload = {
    image1: base64Bg,
    image2: base64Piece,
    type: 'slider' // Default type
  };

  const response = await axios.post('/api/v1/tiktok/resolve-captcha', payload, {
    headers: { 'x-api-key': apiKey }
  });

  return response.data; // Returns coordinates/solution
}

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