FastMCP Files

This is primarily a housekeeping release to remove or deprecate cruft that's accumulated since v1. Primarily, this release refactors FastMCP's internals in preparation for features planned in the next few major releases. However please note that as a result, this release has some minor breaking changes (which is why it's 2.7, not 2.6.2, in accordance with repo guidelines) though not to the core user-facing APIs. Examples include: - decorators return the objects they create, not the decorated function - websockets is an optional dependency - methods on the server for automatically converting functions into tools/resources/prompts have been deprecated in favor of using the decorators directly

Happily, this release DOES permit the use of "naked" decorators to align with Pythonic practice:

:::python
@mcp.tool
def my_tool():
    ...

What's Changed

New Features 🎉

• allow passing flags to servers by @zzstoatzz in https://github.com/jlowin/fastmcp/pull/690
• replace $ref pointing to #/components/schemas/ with #/$defs/ by @phateffect in https://github.com/jlowin/fastmcp/pull/697
• Split Tool into Tool and FunctionTool by @jlowin in https://github.com/jlowin/fastmcp/pull/700
• Use strict basemodel for Prompt; relax from_function deprecation by @jlowin in https://github.com/jlowin/fastmcp/pull/701
• Formalize resource/functionresource replationship by @jlowin in https://github.com/jlowin/fastmcp/pull/702
• Formalize template/functiontemplate split by @jlowin in https://github.com/jlowin/fastmcp/pull/703
• Support flexible @tool decorator call patterns by @jlowin in https://github.com/jlowin/fastmcp/pull/706
• Ensure deprecation warnings have stacklevel=2 by @jlowin in https://github.com/jlowin/fastmcp/pull/710
• Allow naked prompt decorator by @jlowin in https://github.com/jlowin/fastmcp/pull/711

Fixes 🐞

• Updates / Fixes for Tool Content Conversion by @strawgate in https://github.com/jlowin/fastmcp/pull/642
• Fix pr labeler permissions by @jlowin in https://github.com/jlowin/fastmcp/pull/708
• remove -n auto by @jlowin in https://github.com/jlowin/fastmcp/pull/709
• Fix links in README.md by @alainivars in https://github.com/jlowin/fastmcp/pull/723

Breaking Changes 🛫

• Deprecate passing functions to the server in favor of core objects by @jlowin in https://github.com/jlowin/fastmcp/pull/705
• Remove websockets dependency by @jlowin in https://github.com/jlowin/fastmcp/pull/726
• Return objects from FastMCP decorators by @jlowin in https://github.com/jlowin/fastmcp/pull/727

Docs 📚

• Add banner by @jlowin in https://github.com/jlowin/fastmcp/pull/712
• Allow clicking on banner by @jlowin in https://github.com/jlowin/fastmcp/pull/713
• Add empty parens to docs by @jlowin in https://github.com/jlowin/fastmcp/pull/714
• Update banner link by @jlowin in https://github.com/jlowin/fastmcp/pull/716
• Add updates by @jlowin in https://github.com/jlowin/fastmcp/pull/718
• Add tags by @jlowin in https://github.com/jlowin/fastmcp/pull/719
• Update docs.json by @jlowin in https://github.com/jlowin/fastmcp/pull/720
• Remove empty parens from decorators in docs by @jlowin in https://github.com/jlowin/fastmcp/pull/729

New Contributors

• @phateffect made their first contribution in https://github.com/jlowin/fastmcp/pull/697

Full Changelog: https://github.com/jlowin/fastmcp/compare/v2.6.1...v2.7.0