I'm calling the IBM Bluemix Administration API for Message Hub (aka Kafka), as described here.
Calling the endpoint https://kafka-admin-prod02.messagehub.services.eu-gb.bluemix.net:443/topics (using an appropriate X-Auth-Token value corresponding to our API key, and a GET verb) seems to work - it returns a list of the topics we've manually configured in the Bluemix Message Hub admin screen.
However, calling the same URL with the verb POST and a body of {name: 'mynewtopicname'} and a Content-Type of application/json (this appears to be the correct syntax, according to the Swagger docs for the API) doesn't work - I get a result of "HTTP 405 Method Not Allowed". That seems to happen whether I use GET, PUT, POST or DELETE (which also means I cannot delete a topic).
Am I doing something wrong?
(I'm using Message Hub on the UK Bluemix instance, if it's relevant).
To create topics you need to do a POST to the URL /admin/topics, not /topics. Give it a try and let me know if it works.