Web services in Iguana can be served up either on the same HTTP(S) port as the main Iguana GUI or you can choose a separate dedicated web services port.
Which port does Iguana use for Web Services?
You can view and configure this in Settings>HTTP(S) Channels:
And this is the settings page — the port defaults to 6544 but you can change it as required:
Note: You can set up SSL security certificates if you select a dedicated port.