chore(deps): Bump fastmcp from 2.14.7 to 3.2.0

[dependabot]

Bumps fastmcp from 2.14.7 to 3.2.0.

Release notes

Sourced from fastmcp's releases.

v3.2.0: Show Don't Tool

FastMCP 3.2 is the Apps release. The 3.0 architecture gave you providers and transforms; 3.1 shipped Code Mode for tool discovery. 3.2 puts a face on it: your tools can now return interactive UIs — charts, dashboards, forms, maps — rendered right inside the conversation.

FastMCPApp

FastMCPApp is a new provider class for building interactive applications inside MCP. It separates the tools the LLM sees (@app.ui()) from the backend tools the UI calls (@app.tool()), manages visibility automatically, and gives tool references stable identifiers that survive namespace transforms and server composition — without requiring host cooperation.

from fastmcp import FastMCP, FastMCPApp
from prefab_ui.actions.mcp import CallTool
from prefab_ui.components import Column, Form, Input, Button, ForEach, Text
app = FastMCPApp("Contacts")
@​app.tool()
def save_contact(name: str, email: str) -> list[dict]:
db.append({"name": name, "email": email})
return list(db)
@​app.ui()
def contact_manager() -> PrefabApp:
with PrefabApp(state={"contacts": list(db)}) as view:
with Column(gap=4):
ForEach("contacts", lambda c: Text(c.name))
with Form(on_submit=CallTool("save_contact")):
Input(name="name", required=True)
Input(name="email", required=True)
Button("Save")
return view
mcp = FastMCP("Server", providers=[app])

The UI is built with Prefab, a Python component library that compiles to interactive UIs. You write Python; the user sees charts, tables, forms, and dashboards. FastMCP handles the MCP Apps protocol machinery — renderer resources, CSP configuration, structured content serialization — so you don't have to.

For simpler cases where you just want to visualize data without server interaction, set app=True on any tool and return Prefab components directly:

@mcp.tool(app=True)
def revenue_chart(year: int) -> PrefabApp:
    with PrefabApp() as app:
        BarChart(data=revenue_data, series=[ChartSeries(data_key="revenue")])
    return app

Built-in Providers

Five ready-made providers you add with a single add_provider() call:

• FileUpload — drag-and-drop file upload with session-scoped storage

... (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 🔒

• Backport CIMD assertion audience fix to v3 by @​jlowin in #4799

Docs 📚

• Docs: add v3.4.7 changelog entries by @​jlowin in #4810

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 🐞

• Backport #4412 to 3.x: support trusted SSRF proxies by @​jlowin in #4755

Docs 📚

• Docs: add v3.4.6 changelog entries by @​jlowin in #4761

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)

Commits

• 665514e Add forward_resource flag to OAuthProxy (#3711)
• f189d1f Bump pydantic-monty to 0.0.9 (#3707)
• 6faa2d6 Remove hardcoded prefab-ui version from pinning warnings (#3708)
• dd8816c chore: Update SDK documentation (#3701)
• d274959 docs: note that custom routes are unauthenticated (#3706)
• 4a54be2 Add examples gallery page (#3705)
• 961dd50 Add interactive map example with geocoding (#3702)
• f01d0c5 Add quiz example app, fix dev server empty string args (#3700)
• 85b7efd chore: Update SDK documentation (#3694)
• 27abe3c Add sales dashboard and live system monitor examples, bump prefab-ui to 0.17 ...
• Additional commits viewable in compare view

[edward-ly]

@dependabot rebase