Add an API Connect node and configure it in Settings → API Management: define the API (URL, method, headers, query params, body, response type JSON/XML/PLAIN). You can use variables in params and headers via the variable picker. Optionally set Store output in variable to a Local or Global variable. The node has Success and Failed ports (no Continue). Use Test API in API Management to verify before saving. The workflow execution engine calls this API and branches on Success/Failed.
