[Home](./index.md) > [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) > [constructServiceUrl](./ibm-cloud-sdk-core.constructserviceurl.md) ## constructServiceUrl() function Constructs a service URL by formatting a parameterized URL. **Signature:** ```typescript export declare function constructServiceUrl(parameterizedUrl: string, defaultUrlVariables: Map, providedUrlVariables: Map | null): string; ``` ## Parameters

Parameter	Type	Description
parameterizedUrl	string	a URL that contains variable placeholders, e.g. '{scheme}://ibm.com'.
defaultUrlVariables	Map<string, string>	a Map of variable names to default values. Each variable in the parameterized URL must have a default value specified in this map.
providedUrlVariables	Map<string, string> \| null	a Map of variable names to desired values. If a variable is not provided in this map, the default variable value will be used instead.

**Returns:** string the formatted URL with all variable placeholders replaced by values.