Fusion API services are designed to be accessed via Fusion’s authentication proxy module which is part of the Fusion UI service (default port 8764). All applications should use this method to access the API service: 
https://FUSION_HOST:8764/api/<endpoint>

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List all Fusion component services

The Fusion introspect endpoint lists basic information about endpoints and parameters for all Fusion endpoints, including the Connectors services endpoints: 
curl -u USERNAME:PASSWORD https://FUSION_HOST:8764/api/introspect

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REST API Reference Pages