URL Prefill

Every function has its own URL. Pass query parameters to open the form with fields pre-filled:

http://127.0.0.1:8000/my-function?name=Alice&age=30

Parameter names must match the function's parameter names exactly. Values are coerced to the correct type automatically.

Use Cases

Link directly to a pre-configured form:

http://127.0.0.1:8000/send-report?format=pdf&recipient=admin@company.com

Embed in an existing web app via iframe:

<iframe src="http://127.0.0.1:8000/process-image?radius=5"></iframe>

Open from a script:

import webbrowser
webbrowser.open("http://127.0.0.1:8000/analyze?threshold=0.8&mode=strict")

How It Works

Prefill works for all scalar types (str, int, float, bool, date, time). File inputs cannot be prefilled via URL. Optional fields are enabled automatically when a value is provided.

This is the same mechanism ActionTable uses internally — clicking a row navigates to the destination function's URL with the row data as query params.