SolidCraft is worth a serious look because it connects two interests that usually require awkward glue: dimensional CAD and AI automation. It offers constrained sketches, feature timelines, STEP and STL export, and an MCP server. The key distinction from a text-to-mesh toy is that it can create a model whose dimensions and features can be edited after generation.
The project describes a full progression from sketches and constraints to extrudes, fillets, assemblies, materials and measurement. It can import STEP solids and export STEP, IGES, 3MF and STL. There is a macOS desktop download and a browser trial, so an initial test does not require changing the existing Plasticity or Bambu setup.
The headline-grabbing example is a scientific rover modeled through the MCP interface with thousands of editable steps. That is a project demonstration, not proof that the software will replace a mature commercial CAD tool. The authors call the current status early but usable for simple parts and disclose a reference geometry test with one tracked failure.
The useful test is narrower than “replace Plasticity”: ask SolidCraft to make a 40 × 30 × 20 mm electronics enclosure with a 3 mm corner radius and mounting holes. Change the height to 32 mm, export STEP, then open that STEP in Plasticity and inspect the faces. This exercises the promised editable workflow and export quality.
Because the macOS downloads are currently unsigned, check the GitHub release and source before installing. The browser trial is the lower-friction first step. Treat the MCP server as a local automation experiment, not a reason to grant an agent unrestricted access to project folders.
What to do: Try the browser demo first; build a simple parametric enclosure, change one dimension, and verify a STEP export in Plasticity.