[Home](./index.md) > [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) > [BaseService](./ibm-cloud-sdk-core.baseservice.md) > [setDefaultHeaders](./ibm-cloud-sdk-core.baseservice.setdefaultheaders.md) ## BaseService.setDefaultHeaders() method Set the HTTP headers to be sent in every request. **Signature:** ```typescript setDefaultHeaders(headers: OutgoingHttpHeaders): void; ``` ## Parameters

Parameter	Type	Description
headers	OutgoingHttpHeaders	the map of headers to include in requests.

**Returns:** void