API Changelog

Notable API and documentation changes. Breaking changes are announced here before they ship.

2026-08-30 — Documentation Expansion & Accuracy Corrections

Docs: new sections — Task Lifecycle, Troubleshooting, 2Captcha Migration, Security & Data Retention, SDKs, and Java examples.
Correction: GeeTest accuracy in documentation aligned with measured benchmarks — 97% (400 production samples, Jun–Aug 2026). Previous copy claimed 98%+.
Correction: text/image OCR examples now use the synchronous POST /api/process.php endpoint. Older copies referencing in.php?method=base64 for OCR were inaccurate — the legacy pair is xCaptcha-only.

2026-08-10 — xCaptcha Documentation

Docs: dedicated xCaptcha solver guide published, covering both the native endpoint and the 2Captcha-compatible in.php/res.php pair.

2026-01-25 — Initial API Documentation

Docs: first public release of the CaptchaKings API documentation: getting started, authentication, endpoints, errors, rate limits, pricing, and code examples for Python, PHP, Node.js, and cURL.

Staying Notified

Watch this page for changes, or email [email protected] to be added to the API announcement list. Platform status and solver-level updates also appear on the site changelog and AI updates pages.