Recent research has yielded a paper describing how to detect AMT, but there are no screens yet available for AMT that don't require GC/MS or similar technical analysis. It is not one of the NIDA-5 standardly tested for in the basic drug test, nor is it included in the extended drug tests. It is not chemically similar to any of the drugs tested for, so should not trigger the tests as another substance.

Drug Testing Vault
Screening and Confirmation of designer tryptamines, Vorce 2004