I tried it once a year ago, message was delayed. Immediately switched to another App (QKSMS).

Maybe you should add OTLP support? I don’t know how you are ingesting from Fluentbit at the moment, but I think with OTLP basically any log source can be integrated either through the fluentbit OTLP plugin or an OTEL collector.

What? SMS is a proven standard that works reliably. Why do we need to replace that? I tried RCS twice, in both cases the other end did not receive my message or at a later time. Even if SMS needed replacement, RCS is not it.

Do you use fractional scaling? Because it is sharp on my machine on sway.

It is not out ot scope. Basic auth exists: https://username:password@example.com