libssh2-1-dev - 1.9.0-2+deb11u1 main

libssh2 is a client-side C library implementing the SSH2 protocol.
It supports regular terminal, SCP and SFTP (v1-v5) sessions;
port forwarding, X11 forwarding; password, key-based and
keyboard-interactive authentication.
.
This package contains the development files.