Enhance FastMCP server with port override functionality #997
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Thank you for the contribution! The port can already be modified at runtime before calling mcp = FastMCP("My Server")
mcp.settings.port = 9000 # not a very nice way, but it works
mcp.run(transport="sse")The Settings class is mutable (not frozen). Thile adding it as a parameter is a cleaner approach, it adds complexity and might lead to the confusion which parameter to use. |
gspencergoog
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Jul 29, 2025
…delcontextprotocol#997) * Backport changes to `lifecycle.mdx` from `2025-06-18` to `draft`. In the PR releasing a new revision of the spec (modelcontextprotocol#783), commit e547813 changed a `SHOULD` to `MUST` in Lifecycle Operation section, but the change was not backported to the draft file. This PR backports the change avoiding potential regressions. * Update docs/specification/draft/changelog.mdx --------- Co-authored-by: Jonathan Hefner <[email protected]>
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Motivation and Context
Previously, the port could only be set during the initialization of the server. By allowing the port to be passed directly to run(), developers can now override the listening port at runtime. This change aligns with the ergonomics of popular Python web frameworks, enhancing the developer experience.
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