Python SPNEGO Authentication Library

pyspnego is a Python library designed to handle SPNEGO (Negotiate, NTLM, Kerberos) and CredSSP authentication, offering a unified interface across different operating systems. It leverages SSPI on Windows and GSSAPI on Linux, and also includes a utility for parsing raw NTLM/SPNEGO/Kerberos tokens. The library is actively maintained, with version 0.12.1 released on March 2, 2026, and follows a regular release cadence.