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chore(deps): Bump fastmcp from 3.1.1 to 3.4.6 in /app - #24

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chore(deps): Bump fastmcp from 3.1.1 to 3.4.6 in /app#24
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Bumps fastmcp from 3.1.1 to 3.4.6.

Release notes

Sourced from fastmcp's releases.

v3.4.6: Trust, but Proxy

FastMCP 3.4.6 backports trusted-proxy support for SSRF-protected OAuth metadata and JWKS fetches. Deployments can now route these requests through a mandated corporate proxy while preserving custom CA certificates; FastMCP refuses the fetch when no proxy is configured instead of risking an unprotected direct request.

What's Changed

Fixes 🐞

Docs 📚

Full Changelog: PrefectHQ/fastmcp@v3.4.5...v3.4.6

v3.4.5: Key Change

FastMCP 3.4.5 collects five fixes for the 3.x line. The one that prompted it: a single Ed25519 key in a JWKS — which Rauthy, Ory Hydra, and some Keycloak configurations publish by default — made JWTVerifier reject every token, including ones correctly signed by supported keys in the same set.

What's Changed

Fixes 🐞

Docs 📚

New Contributors

Full Changelog: PrefectHQ/fastmcp@v3.4.4...v3.4.5

v3.4.4: Host in Translation

FastMCP 3.4.4 restores HTTP deployment compatibility after the 3.4.3 Host/Origin guard changed default behavior for existing ASGI, serverless, and reverse-proxy deployments. The guard implementation remains available for deployments that opt in with explicit trusted hosts and origins, while 3.x returns to accepting traffic that worked before the patch. This release also adds Hugging Face OAuth provider support, with docs and examples for public and private apps, PKCE, Dynamic Client Registration, and CIMD.

What's Changed

Enhancements ✨

Fixes 🐞

Docs 📚

New Contributors

... (truncated)

Changelog

Sourced from fastmcp's changelog.


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

v3.4.7: Know Your Audience

FastMCP 3.4.7 fixes CIMD private_key_jwt authentication on bare-origin OAuth proxy deployments by validating client assertions against the exact token endpoint advertised in OAuth metadata.

Security 🔒

Docs 📚

Full Changelog: v3.4.6...v3.4.7

v3.4.6: Trust, but Proxy

FastMCP 3.4.6 backports trusted-proxy support for SSRF-protected OAuth metadata and JWKS fetches. Deployments can now route these requests through a mandated corporate proxy while preserving custom CA certificates; FastMCP refuses the fetch when no proxy is configured instead of risking an unprotected direct request.

Fixes 🐞

Docs 📚

Full Changelog: v3.4.5...v3.4.6

v4.0.0b1: Fourgone Conclusion

FastMCP 4 makes stateful MCP applications work on the sessionless 2026-07-28 protocol while one deployment continues serving handshake-era clients. Tools can ask follow-up questions across requests, preserve authenticated user state, and move long-running work into background tasks without sticky sessions. Protocol extensions and enterprise identity become first-class surfaces, and most FastMCP 3 servers upgrade unchanged even though MCP Python SDK v2 rewrote the engine underneath them. Server-initiated sampling and roots are removed from the server API; the upgrade guide covers their replacements.

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

... (truncated)

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Bumps [fastmcp](https://github.com/PrefectHQ/fastmcp) from 3.1.1 to 3.4.6.
- [Release notes](https://github.com/PrefectHQ/fastmcp/releases)
- [Changelog](https://github.com/PrefectHQ/fastmcp/blob/main/docs/changelog.mdx)
- [Commits](PrefectHQ/fastmcp@v3.1.1...v3.4.6)

---
updated-dependencies:
- dependency-name: fastmcp
  dependency-version: 3.4.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Aug 12, 2026
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