Bump fastmcp from 3.0.2 to 3.2.0

[dependabot]

Bumps fastmcp from 3.0.2 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

v3.1.1: 'Tis But a Patch

Pins pydantic-monty below 0.0.8 to fix a breaking change in Monty that affects code mode. Monty 0.0.8 removed the external_functions constructor parameter, causing MontySandboxProvider to fail. This patch caps the version so existing installs work correctly.

Fixes 🐞

• Pin pydantic-monty below 0.0.8 to fix code mode by @​jlowin in #3497

Full Changelog: v3.1.0...v3.1.1

v3.1.0: Code to Joy

FastMCP 3.1 is the Code Mode release. The 3.0 architecture introduced providers and transforms as the extensibility layer — 3.1 puts that architecture to work, shipping the most requested capability since launch: servers that can find and execute code on behalf of agents, without requiring clients to know what tools exist.

New Features 🎉

• feat: Search transforms for tool discovery by @​jlowin in #3154
• Add experimental CodeMode transform by @​aaazzam in #3297
• Add Prefab Apps integration for MCP tool UIs by @​jlowin in #3316

Enhancements 🔧

• Lazy-load heavy imports to reduce import time by @​jlowin in #3295
• Add http_client parameter to all token verifiers for connection pooling by @​jlowin in #3300
• Add in-memory caching for token introspection results by @​jlowin in #3298
• Add SessionStart hook to install gh CLI in cloud sessions by @​jlowin in #3308
• Fix ty 0.0.19 type errors by @​jlowin in #3310
• Code Mode: Add resource limits to MontySandboxProvider by @​jlowin in #3326
• Accept transforms as FastMCP init kwarg by @​jlowin in #3324
• Split large test files to comply with loq line limit by @​jlowin in #3328
• Add -m/--module flag to fastmcp run and dev inspector by @​dgenio in #3331
• Add search_result_serializer hook and serialize_tools_for_output_markdown by @​MagnusS0 in #3337
• Add MultiAuth for composing multiple token verification sources by @​jlowin in #3335
• Adds PropelAuth as an AuthProvider by @​andrew-propelauth in #3358
• Replace vendored DI with uncalled-for by @​chrisguidry in #3301
• Decompose CodeMode into composable discovery tools by @​jlowin in #3354
• feat(contrib): auto-sync MCPMixin decorators with from_function signatures by @​AnkeshThakur in #3323
• Add Google GenAI Sampling Handler by @​strawgate in #2977
• Add ListTools, search limit, and catalog size annotation to CodeMode by @​jlowin in #3359
• Allow configuring FastMCP transport setting in the same way as other configuration by @​jvdmr in #1796
• Add include_unversioned option to VersionFilter by @​yangbaechu in #3349

... (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

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