support BYOL, custom runtimes or add in 3rd party libraries

We have been using browser checks as intended and also not as intended. We are using browser scripts to monitor some of observability endpoints /push routes but sending json payloads. However one of the /push endpoints needs its payload to be protobuf encoded and compressed with snappy (see here more info on that). Protobufjs and snappy are both 3rd party libraries and are not part of any runtimes.

Is there a way to support users defining their own runtimes, bringing their own libraries or own runners (VMs, containers, etc), or maybe another type of check more catered to this instead of a browser check.

ty 🙏