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deps(python): Bump fastmcp from 4.0.0b3 to 4.0.0b5 - #10820

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deps(python): Bump fastmcp from 4.0.0b3 to 4.0.0b5#10820
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Bumps fastmcp from 4.0.0b3 to 4.0.0b5.

Release notes

Sourced from fastmcp's releases.

v4.0.0b5: Group Effourt

FastMCP 4 beta 5 introduces ClientGroup — one managed client per server, each negotiating its own protocol era independently, with collision-checked tool namespacing and call routing and no proxy in the middle. It also aligns middleware response limits with output schemas.

What's Changed

Enhancements ✨

Fixes 🐞

Docs 📚

New Contributors

Full Changelog: PrefectHQ/fastmcp@v4.0.0b4...v4.0.0b5

v4.0.0b4: Calm Befour the Storm

FastMCP 4 beta 4 improves modern multi-server clients and adds Prefect Horizon account commands. It also tightens proxy and CIMD security boundaries and fixes Unicode search and MCP inspect output.

What's Changed

Enhancements ✨

Security 🔒

Fixes 🐞

Docs 📚

Other Changes 🦾

New Contributors

... (truncated)

Changelog

Sourced from fastmcp's changelog.


title: "Changelog" icon: "list-check" rss: true tag: NEW

v4.0.0: Four Real

FastMCP 4 is the FastMCP release for the new MCP: full support for the 2026-07-28 protocol revision and the rewritten Python SDK v2, with per-connection negotiation so old-protocol clients keep working against upgraded servers. Interactive tools, background tasks via the io.modelcontextprotocol/tasks extension, a first-class extension model, identity assertion, dependency injection with call-argument binding, and ClientGroup all land as stable surfaces. Most FastMCP 3 applications upgrade without code changes.

New Features 🎉

  • Migrate to MCP Python SDK v2 by @​jlowin in #4437
  • Teach fastmcp.Client the modern protocol: mode negotiation, MRTR driver, response cache by @​jlowin in #4450
  • Forward-port Hugging Face auth provider by @​jlowin in #4475
  • Add server-side identity assertion (SEP-990 ID-JAG) by @​jlowin in #4483
  • Add guard-mode multi-round-trip tools (SEP-2322) by @​jlowin in #4544
  • Add FastMCP-native server extension API (SEP-2133) by @​jlowin in #4602
  • Add stateless session state (UserSession / SessionId) by @​jlowin in #4604
  • Add background tasks via the io.modelcontextprotocol/tasks extension (SEP-2663) by @​jlowin in #4603

Breaking Changes ⚠️

Enhancements ✨

... (truncated)

Commits

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Bumps [fastmcp](https://github.com/PrefectHQ/fastmcp) from 4.0.0b3 to 4.0.0b5.
- [Release notes](https://github.com/PrefectHQ/fastmcp/releases)
- [Changelog](https://github.com/PrefectHQ/fastmcp/blob/main/docs/changelog.mdx)
- [Commits](PrefectHQ/fastmcp@v4.0.0b3...v4.0.0b5)

---
updated-dependencies:
- dependency-name: fastmcp
  dependency-version: 4.0.0b5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python labels Aug 31, 2026
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