GeeTest v3 vs v4: Differences in Initialization, Parameters, Secondary Validation, and Automation Integration Architecture
GeeTest v3 and v4 are two independent architectures: v3 requires server-generated dynamic challenge, client initialization with gt and challenge, and returns validate and seccode; v4 removes request stickiness, uses static captcha_id, introduces adaptive verification, and returns lot_number, pass_token, captcha_output, and gen_time, with server-side HMAC-SHA256 validation.
Integrating a CAPTCHA Solving API in Node.js: Task Submission, Polling, Error Handling, and Result Injection
A practical guide for Node.js developers on the two-stage CAPTCHA solving REST API flow: constructing requests for image and token tasks, polling with timeout and backoff, classifying errors, and injecting results into Playwright/Puppeteer pages for a complete loop.
How to Integrate an hCaptcha Solving API: Parameters, Task Flow, Token Injection, and Rejection Troubleshooting
Explains how an hCaptcha solving API works: what parameters to prepare before submitting tasks, how to handle Enterprise rqdata, how to complete polling or callback within the ~120-second validity window, and how to inject tokens and trigger data-callback in Playwright, Puppeteer, or Selenium, plus the troubleshooting order when the service returns a token but the target site rejects it.
