November 2026

[November 2, 2026] FastAPI Signature Algorithm Upgrade

• Release date: November 3, 2026

The FastAPI request signature algorithm is being upgraded from MD5withRSA to SHA256withRSA. You only need to change the hash algorithm from MD5 to SHA-256 in both your request-signing code and your callback signature verification code. For example, in Java, replace Signature.getInstance("MD5withRSA") with Signature.getInstance("SHA256withRSA"); the same applies to other languages. The estimated effort is under one hour, plus sandbox testing.
For the detailed migration timeline, please refer to Bitget FastAPI Signature Algorithm Upgrade Notice