Claude Managed Agent offers programmatic Claude access with a ready-made harness that handles model-specific parameters and breaking changes for users.

“you wouldn't really get very far, and that's one of the things actually that, um, is part of the value prop with something like Claude Managed Agent, which is like still programmatic access to Claude in an API, but you get a harness out of the box where we do every time we're launching the model a lot of the work to go figure out like what are the new parameters, what are the breaking changes, how do we get the best out of Claude within our harness, so that for the people who are using it, um, you just kind of get that out of the box.”