Can a!startProcess be used in an expression rule which is called from a web api?

We've been able to successfully start a process using a!startProcess within a Web API. We haven't successfully called a!startProcess as part of an expression rule called from a Web API. The documentation for a!startProcess does say it will only execute inside a saveinto or a Web API. We were hoping that included calling it as part of an expression from a Web API but that doesn't appear to be the case.

Can anyone confirm if you can call a!startProcess as part of an expression if the expression is called from a Web API?

Thanks!
Craig

OriginalPostID-255092