build(deps): bump fastmcp from 3.1.0 to 3.2.0 in /libs/python/cua-cli by dependabot[bot] · Pull Request #1252 · trycua/cua

dependabot · 2026-03-31T22:31:23Z

Bumps fastmcp from 3.1.0 to 3.2.0.

Release notes

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)

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 ...
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Bumps [fastmcp](https://github.com/PrefectHQ/fastmcp) from 3.1.0 to 3.2.0. - [Release notes](https://github.com/PrefectHQ/fastmcp/releases) - [Changelog](https://github.com/PrefectHQ/fastmcp/blob/main/docs/changelog.mdx) - [Commits](PrefectHQ/fastmcp@v3.1.0...v3.2.0) --- updated-dependencies: - dependency-name: fastmcp dependency-version: 3.2.0 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>

vercel · 2026-03-31T22:31:27Z

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github-actions · 2026-03-31T22:31:32Z