Migrating reCAPTCHA solving off 2Captcha: the one-line swap
Most teams who solve reCAPTCHA at volume started on 2Captcha. What people don't realize is that the 2Captcha API has effectively become a shared interface — several providers implement the same in.php / res.php contract. So switching usually isn't a rewrite; it's a base-URL change.
This matters because the main reason to switch is cost at volume (per-1,000 scales linearly; thread-based flattens it). If migrating were a big refactor the savings wouldn't be worth it. It isn't, so they are.
The actual diff
Typical 2Captcha reCAPTCHA code:
