Hello, (answering to myself) it is working after moving it the last route before the t_relay(). So, one just need to be careful to not chain several async route executions, as the previous state gets lots apparently. Cheers, Henning From: Henning Westerholt Sent: Thursday, June 9, 2022 12:53 PM To: Kamailio (SER) - Users Mailing List &lt;sr-users(a)lists.kamailio.org&gt; Subject: remove header in async processing (e.g. by http_async_client) Hello, I'd like to remove headers during async processing e.g. in a route called from http_async_client(..). The usual textops functions are not working here. Adding headers could be done using something like rtjson, but it do not offer a remove header function. I could of course loop the request locally, but this is not that "nice". Any other suggestions for this case? Or just the rtjson module needs some extensions? Thank you, Henning -- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://gilawa.com<https://gilawa.com/>