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Pin Cyclopts to v4.0.0 + compliance note (#2354)

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* Pin cyclopts to v5.0.0a1+

* Document cyclopts/docutils licensing

* Update docs
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Jeremiah Lowin 2025-11-03 15:37:12 -08:00 • committed by GitHub
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docs/getting-started/installation.mdx
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@ -42,6 +42,20 @@ Python version: 3.12.2
Platform: macOS-15.3.1-arm64-arm-64bit
FastMCP root path: ~/Developer/fastmcp
```
### Dependency Licensing
<Info>
FastMCP depends on Cyclopts for CLI functionality. Cyclopts v4 includes docutils as a transitive dependency, which has complex licensing that may trigger compliance reviews in some organizations.
If this is a concern, you can install Cyclopts v5 alpha which removes this dependency:
```bash
pip install "cyclopts>=5.0.0a1"
```
Alternatively, wait for the stable v5 release. See [this issue](https://github.com/BrianPugh/cyclopts/issues/672) for details.
</Info>
## Upgrading from the Official MCP SDK
Upgrading from the official MCP SDK's FastMCP 1.0 to FastMCP 2.0 is generally straightforward. The core server API is highly compatible, and in many cases, changing your import statement from `from mcp.server.fastmcp import FastMCP` to `from fastmcp import FastMCP` will be sufficient.