# nw_relay_hop_add_additional_http_header_field(_:_:_:) Adds an HTTP header name and value pair to send as part of `CONNECT` requests to the relay. ``` func nw_relay_hop_add_additional_http_header_field(_ relay_hop: nw_relay_hop_t, _ field_name: UnsafePointer, _ field_value: UnsafePointer) ``` ## Parameters `relay_hop` The relay hop to modify. `field_name` The HTTP header name. `field_value` The HTTP header value. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)