autodesk-fusion-mcp
MCP server that runs inside Autodesk Fusion and exposes its modeling API to AI agents.
What it does and how it connects
autodesk-fusion-mcp is a standalone MCP server that runs inside Autodesk Fusion, formerly Autodesk Fusion 360, as an add-in. AI agents connect over Streamable HTTP, the current MCP transport specification, with no external proxy, middleware or dependencies required. The server listens on http://127.0.0.1:8765/mcp and supports Windows and macOS.
The server exposes 14 dedicated MCP tools, including a generic Fusion API call tool, Python execution inside the live Fusion session, viewport capture and camera control, reading the active selection, session-only selection annotations, Fusion API documentation lookup, and saving and loading reusable Python scripts. It uses only Python's standard library and the Fusion SDK, and a thread-safe bridge relays HTTP requests to Fusion's main thread through a custom event and work-queue dispatcher to prevent crashes.
Installation is from a release zip or a source clone into the Fusion add-ins folder, followed by running the add-in from Fusion's Add-Ins tab. The README documents protocol compatibility with the 2026-07-28 stateless requests and the 2025-11-25, 2025-06-18 and 2025-03-26 clients on the same endpoint.
What engineers report
MCP Inspector CLI works fine (tools/list returns all tools). Claude Code (--transport http) fails: InvalidHTTPResponse fetching http://127.0.0.1:8765. Claude Desktop via supergateway / mcp-remote fails after initialize: HTTPParserError: Response does not match the HTTP/1.1 protocol (Invalid character in chunk size).
2026-09-28Read the original
Alternatives
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An open-source build package that hands Claude Code a master prompt to build a Fusion MCP system, rather than a finished add-in that runs inside Fusion.
- ipt-mcp
An MCP gateway that drives Autodesk Inventor 2022 to 2027 through a per-version add-in, rather than an add-in that runs inside Fusion.
Recurring errors it addresses
Error Index entries this tool is built to reduce or work around.
- Cloud-first file model makes local file control, rename/move/backup workflows feel alien and risky.Error Index
- General UI/UX is described as confusing and hostile for routine work.Error Index
- ChatGPT's Computer Use agent cannot drive Autodesk Fusion 360: selecting Always allow does not stick, a later window-state request fails with 'Computer Use was not approved to use fusion360', and the requested CAD design could not be created. Desktop logs recorded three allow-persist-always approvals with no persisted entry in the config.Error Index
Sources
Not verified
- Pricing: none stated on the repo.
- A named individual builder beyond the repository owner handle frankhommers
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.