A brief heads up note that with the release of VMware Cloud Director 10.5 and its corresponding API version 38.0 the legacy API endpoint POST /api/sessions has been removed.
It has been announced for deprecation for some time (actually it was initially planned to be removed in VCD 10.4) and I blogged in detail about the replacement /cloudapi/1.0.0/sessions and /cloudapi/1.0.0/sessions/provider endpoints in the Control System Admin Access blog post.
Any 3rd party tools that use the legacy endpoint and API version 38.0 will get HTTP response 405 – Method not found.
Note that the GET /api/session method will still work until all legacy APIs will be moved to /cloudapi.
Also due to backward compatibility API versions 37.2 – 35.2 still provide the legacy endpoint even with VCD 10.5.
Tom Fojta's Blog 