Solidworks MCP

Only SolidWorks 2021 has been tested. Other versions may work since the COM API is largely stable, but no guarantees.

git clone https://github.com/haunchen/solidworks-mcp.git cd solidworks-mcp python -m venv .venv .venv\Scripts\pip install -r requirements.txt

pip download -d ./wheels -r requirements.txt

Copy the repo (includingwheels/) to the SolidWorks host, then:

.venv\Scripts\pip install --no-index --find-links wheels -r requirements.txt

Copy-Item .env.example .env # edit .env — see Configuration below

4. Connect from Claude Code (client machine)

claude mcp add --transport http solidworks http://<sw-host>:8080/mcp

Then just ask Claude:"Open bracket.sldprt and create a first-angle 3-view drawing with dimensions, then export it as PDF."

Any MCP client that supportsStreamable HTTPand runs on your machine (or inside the LAN) can connect. Verified examples:

Agent frameworks work too: OpenAI Agents SDK (MCPServerStreamableHttp), LangChain (langchain-mcp-adapters).

Cloud-brokered connectors cannot reach a LAN-only server: Claude Desktop / claude.ai custom connectors and the Anthropic Messages API MCP connector all connect from the vendor's cloud, which is exactly what the trusted-LAN security model blocks.

All settings are loaded from.env(see.env.example):

This server has no authentication.Anyone who can reach the port can drive your SolidWorks instance and read/write files through it.

- Deploy on atrusted LAN only— never expose the port to the internet
- Prefer bindingSW_MCP_HOSTto a specific LAN interface instead of0.0.0.0
- Consider OS-level firewall rules restricting access to known client IPs

# run all tests (no SolidWorks needed — the COM layer is fully mocked) .venv\Scripts\pytest tests/ -v

Behavior contracts live indocs/specs/— specs withstatus: activedescribe the expected behavior of shipped features. Design history is indocs/plans/.

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