[Home](./index) > [valkyrie-js](./valkyrie-js) > [api](./valkyrie-js.api) > [APIClient](./valkyrie-js.api.apiclient) > [(constructor)](./valkyrie-js.api.apiclient._constructor_) ## api.APIClient.(constructor) Constructs a new instance of the `APIClient` class **Signature:** ```typescript constructor(opts: { origin: APIClient["origin"]; credential?: APIClient["credential"]; fetch?: APIClient["fetch"] | null | undefined; }); ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | opts | { origin: [APIClient](./valkyrie-js.api.apiclient)\["origin"\]; credential?: [APIClient](./valkyrie-js.api.apiclient)\["credential"\]; fetch?: [APIClient](./valkyrie-js.api.apiclient)\["fetch"\] \| null \| undefined; } | |