Created I believe is the only (?) info parameter that is saved. I tried something similar to what you are doing and just couldn’t deal with the attention needed distractions. Creating the note with creation date was straight forward but the rest was simply untenable. However, I was tracking “note creation time” w/ assembling the data necessary, research, charts&graphs, rewrites etc; I tried for one project and went back to pricing on a per project basis which was best for me and the companies didn’t want to deal with the hourly stuff anyway. @drewmccormack mentioned Timing in a past post. They have become one of the best but I think now over priced.
PS: do they give a discount for posting Agenda as one of their integration?