Helpdesk: https://publiceurope.eu/helpdesk

Start a conversation (use this file’s page token):
curl -X POST https://publiceurope.eu/helpdesk -H 'Content-Type: application/json' -d '{"action":"start","urlToken":"aHR0cHM6Ly9wdWJsaWNldXJvcGUuZXUvbGxtLnR4dA.BKIh_5PyDaaLqJOVMOjnuHCKvBCEVzJz6RQtrwa7I7I"}'

Keep the "token" value from the response. Send your question:
curl -X POST https://publiceurope.eu/helpdesk -H 'Content-Type: application/json' -H 'Authorization: Bearer YOUR_CONVERSATION_TOKEN' -d '{"message":"Your question"}'

Read replies with GET to the same URL and Authorization header.