API for creating, accepting contracts and sending ISK

how can you make a contract with an API that is delayed 1H ?
If you try to make the contract and the creation fails, because since last time you got the assets it changed (remember average time is 30 minute), you get an error for no visible reason. And since usually the contract has several items, you can’t even have a missing data type of error (which one(s) ?)

but I agree that creating contracts from clipboard would be nice. The issue is that contracts take items, not types, while parsing creates types references, not items references.