# Service functions
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| Action | Method | Description | 
| --- | --- | --- | 
| CreateServiceFunction | POST | Create a service function with criticality (PRIMARY/SUPPLEMENTAL). | 
| UpdateServiceFunction | POST | Update service function properties. | 
| ListServiceFunctions | GET | List service functions for a service. | 
| DeleteServiceFunction | POST | Delete a service function. | 
| AddServiceFunctionResources | POST | Associate resources with a service function (up to 10 per call). | 
| DeleteServiceFunctionResources | POST | Remove resource associations (up to 10 per call). |