Adam vs Fusion MCP: why hardware teams choose Adam.

Fusion MCP is Autodesk's official Model Context Protocol integration for Autodesk Fusion, built with Anthropic. A local server runs on your machine and executes commands in the live Fusion desktop session. A separate, cloud-hosted Fusion Data MCP server answers questions about Fusion Team project data. Both are bridges. They hand a general-purpose chat model access to the Fusion API and let it improvise.

Setup means enabling the local MCP server in Fusion's preferences, installing the connector, and keeping Fusion and a local MCP client open at the same time. Autodesk built and markets this specifically around the Claude desktop app; the Claude web app can't reach it. Other MCP-compatible clients like Cursor can technically point at the same local server, but there's no in-product way to switch models the way a dedicated model picker would give you.

Because it's a general chat model rather than an engineering agent, it shows. Hands-on reviews find it handles simple shapes with explicit dimensions but struggles with organic or complex parts, and independent write-ups describe it as an automation layer rather than a design generator. It executes commands against an API; it doesn't bring engineering judgment of its own.

Adam is a dedicated mechanical-engineering agent for hardware teams, working across CAD platforms, including Onshape and Autodesk Fusion today, with more on the way. Unlike a general chat model routed at a CAD API, Adam runs on purpose-built skill modules for engineering work. It has dedicated tools for feature trees, parametrization, sketch constraints, BOM logic, and manufacturability, tuned for the job instead of improvised against documentation.

Adam also isn't locked to one AI vendor. Pick the model that powers your work: Anthropic, OpenAI, Google, and xAI are all available, matched to the task instead of whatever one connector happens to support. Adam edits parts with prompts, uses selected geometry as context, cleans up feature trees, and converts ad-hoc models into parametric ones, right inside the CAD tools you already use. And when you're starting from nothing, Adam's text-to-CAD workspace generates parametric 3D models from a prompt. No desktop install required to begin.

Beyond the modeling window, Adam connects to the PLM and suppliers your team already runs on. It builds and reconciles BOMs, produces render sets, and works with suppliers directly, reachable from email as well as the browser. That's the difference between a bridge and an agent. One gives an AI access to an API. The other gets the engineering work done.

There's a narrow case for Fusion MCP. If you already pay for both Fusion and Claude Desktop and only want occasional help with batch chores on files you already have open, the marginal cost is low. That's it. It doesn't generate parts from a blank page reliably, it gives you no in-product way to switch models, and it stops at the geometry. Nothing about the BOM or the supplier quote.

For everything else, Adam is the engineering agent built to do the job outright: modeling from scratch, editing existing designs, choosing the model that fits the task, and carrying the change through to the BOM, in whichever CAD platform you work in. And there's nothing to install to get started.