[Home](./index.md) > [@xg-wang/openai-js](./openai-js.md) > [ClientOptions](./openai-js.clientoptions.md) > [apiKey](./openai-js.clientoptions.apikey.md) ## ClientOptions.apiKey property API key in an Authorization HTTP header https://beta.openai.com/docs/api-reference/authentication Signature: ```typescript apiKey?: string; ```