Hi!
It's quite odd that Kerberos V5 API docs cannot be found on the MIT's Kerberos page:
The only thing that's being found on MIT servers by a Google query is documentation for Heimdal!
OTOH, the MIT's Krb5 API documentation can be found outside of MIT domain:
It's nice that this documentation is available on the web at all. Its existence solely outside MIT jurisdiction, however, may introduce doubt about recentness of that documentation.