Not available on Predict.fun. The Copytrade API is Polymarket-only today. Predict.fun is supported through the Trade API; the Copytrade API is not part of that coverage.
Copytrade
Copytrade API on Predict.fun
Copytrade is not available on Predict.fun. It is a Polymarket-only part of the Trade API.
Mirroring a leader wallet’s fills is supported on Polymarket. For how this product behaves in general, see the Copytrade API product page.