action stream_io_api_list_channel_types { label: "List channel types" description: "Lists all available channel types" provider: stream_io_api method: GET path: "/channeltypes" encoding: json output: { type: "object" required: ["channel_types", "duration"] properties: { channel_types: { type: "object" description: "Object with all channel types" } duration: { type: "string" } } } }