cmsdk 1.0.0

A modern Python SDK for generating dynamic JSON interfaces

JSONApp Python SDK

Note: This is the Python port of the JSONApp SDK. This repository is a monorepo containing multiple language implementations. See the root README for an overview.

A stateless backend library for building views that are sent to renderers (mobile or web). This is the Python port of the TypeScript JSONApp SDK.

Features

• Stateless Architecture: No internal state, perfect for serverless and microservices
• Ed25519 Signing: Secure view signing and verification using Ed25519 cryptography
• 12 View Types: Form, Reader, ActionList, ActionGrid, QRScan, QRDisplay, Message, Card, Carousel, Timeline, Media, Map
• Type Safety: Full type definitions using Python dataclasses and type hints
• Validation: Built-in field and form validation
• Security: XSS protection, URL validation, input sanitization

Installation

pip install -r requirements.txt

Quick Start

from jsonapp import JsonApp, JsonAppConfig
from jsonapp.views import FormView

# Initialize JsonApp
config = JsonAppConfig(
    app_id="my-app",
    view_expiration_minutes=60,
)
app = JsonApp(config)

# Create a form view
form = app.create_form_view("registration", "User Registration")
form.add_text_field("name", "Full Name", is_required=True)
form.add_email_field("email", "Email", is_required=True)
form.submit_button("Register")

# Serve with signature
response = app.serve(form)
print(response.view)  # The view JSON
print(response.signature)  # Ed25519 signature

View Types

FormView

Create forms with various field types (text, email, password, select, file, GPS, etc.)

ReaderView

Display rich content with paragraphs, images, markdown, tables, code blocks, etc.

ActionListView / ActionGridView

Display lists or grids of actions

QRScanView / QRDisplayView

QR code scanning and display

MessageView

Display messages with actions

CardView

Display card-based content with stats and sections

CarouselView

Display carousel slides

TimelineView

Display chronological events

MediaView

Display audio and video playlists

MapView

Display geographic data on maps

API Parity

The Python SDK maintains API parity with the TypeScript version:

• Same factory methods: app.create_form_view(), app.create_reader_view(), etc.
• Same fluent API: view.add_field().set_intro().submit_button() (or set_note() for backward compatibility)
• Same validation and security features
• Same Ed25519 signing and verification

Examples

See examples/basic_usage.py for a complete example.

Requirements

• Python 3.10+
• cryptography (for Ed25519)
• markdown (for ReaderView markdown support)
• bleach (for HTML sanitization)

Status

✅ Core classes (BaseView, JsonApp) ✅ All 12 view types ✅ Type definitions ✅ Error handling ✅ Validation utilities ✅ Ed25519 signing/verification ✅ Examples

License

Same as the TypeScript SDK.