FastAPI + SyftBox
Project description
fastsyftbox
Build offline-first Python apps with FastAPI and SyftBox — FAST.
🚀 Features
- Build local admin UIs with FastAPI.
- Build delay-tolerant UIs/APIs using SyftEvents.
- Keep private data offline with SyftBox HTTP over RPC.
- Builtin JS SDK with
fetchcompatible syntax - Debug APIs with a built-in Postman-style interface.
🔧 Purpose
How can you build a web app that runs on your own device, without uploading data to the cloud?
With SyftBox, you can:
- Run a webserver anywhere that can go offline and keep functioning when it comes back online.
- Access your data even when offline or when your laptop lid is closed.
⚡ Quick Start
Install with uv and create your app:
uvx fastsyftbox version
uvx fastsyftbox create app test
To start in hot-reloading more:
cd test
./run.sh
This generates a sample FastAPI app in app.py:
app = FastAPI(title=app_name)
# add your fastapi app to the syftbox object
syftbox = Syftbox(app=app, name=app_name)
# normal fastapi
@app.get("/", response_class=HTMLResponse)
def root():
return HTMLResponse("<html><body><h1>Welcome to {app_name}</h1>")
# build a model with pydantic
class MessageModel(BaseModel):
message: str
name: str | None = None
# make syftbox rpc endpoints easily
# syft://{datasite}/app_data/{app_name}/rpc/hello
@syftbox.on_request("/hello")
def hello_handler(request: MessageModel):
response = MessageModel(message=f"Hi {request.name}", name="Bob")
return response.model_dump_json()
# Debug your RPC endpoints in the browser
syftbox.enable_debug_tool(
endpoint="/hello",
example_request=str(MessageModel(message="Hello!", name="Alice").model_dump_json()),
publish=True,
)
HTTP / JS
Vanilla JS fetch:
const url = "http://somewebsite.com/api"
const request = await fetch(url, {
method: 'POST',
headers,
body
});
Becomes syftFetch:
const syftUrl = "syft://madhava@openmined.org/app_data/fastsyftbox/rpc/hello"
const request = await syftFetch(syftUrl, {
method: 'POST',
headers,
body
});
Under the hood:
- Translates to the correct HTTP request
- Adds
syft-xheaders - Waits for queued response
- Polls future until completed
What is SyftBox?
SyftBox is a new platform for building privacy-preserving applications and experiences that work over the internet without uploading your data. Instead of sending your data to a server, SyftBox lets you run powerful AI and analytics locally or in trusted environments, so your personal information stays private and secure.
🧱 Your Dependencies
Add any Python dependencies to requirements.txt and run.sh will install them fresh every run.
🧪 RPC Debug Tool
Its like Postman but for SyftBox RPC.
A built-in HTML/JS tool helps you debug your HTTP over RPC endpoints. To enable:
syftbox.enable_debug_tool(
endpoint="/hello",
example_request=str(MessageModel(message="Hello!", name="Alice").model_dump_json()),
publish=True,
)
🧭 Construct syft:// RPC URLs
🎯 Configure custom headers
🔍 View real-time responses
Then visit either: http://localhost:${SYFTBOX_ASSIGNED_PORT}/rpc-debug or if you have publish=True https://syftboxdev.openmined.org/datasites/{{ email }}/public/{{ app_name }}/rpc-debug.html
📥 SyftBox App Install via GitHub
syftbox app install GITHUB_URL
This executes run.sh and binds your app to a random port: http://localhost:${SYFTBOX_ASSIGNED_PORT}
📚 Example fastsyftbox Apps
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