clasp-to 4.0.0

CLASP client for Python - Creative Low-Latency Application Streaming Protocol

CLASP Python Client

A Python client for the CLASP protocol - Creative Low-Latency Application Streaming Protocol for creative tools communication.

Installation

pip install clasp-to

Quick Start

import asyncio
from clasp import Clasp

async def main():
    # Connect to a CLASP server
    sf = Clasp('ws://localhost:7330')
    await sf.connect()

    # Subscribe to parameter changes
    @sf.on('/lumen/layer/*/opacity')
    def on_opacity(value, address):
        print(f'{address} = {value}')

    # Set a parameter
    await sf.set('/lumen/layer/0/opacity', 0.75)

    # Get a parameter
    opacity = await sf.get('/lumen/layer/0/opacity')
    print(f'Current opacity: {opacity}')

    # Emit an event
    await sf.emit('/lumen/cue/fire', {'cue': 1})

    # Keep running
    sf.run()

asyncio.run(main())

Builder Pattern

from clasp import ClaspBuilder

async def main():
    client = await (
        ClaspBuilder('ws://localhost:7330')
        .with_name('My Python App')
        .with_features(['param', 'event'])
        .with_reconnect(True, interval=5.0)
        .connect()
    )

    # Use client...
    await client.close()

API Reference

Clasp

• connect() - Connect to server
• close() - Close connection
• subscribe(pattern, callback) - Subscribe to address pattern
• on(pattern) - Decorator for subscriptions
• set(address, value) - Set parameter value
• get(address) - Get parameter value
• emit(address, payload) - Emit event
• stream(address, value) - Send stream sample
• bundle(messages, at) - Send atomic bundle
• cached(address) - Get cached value
• time() - Get server time (microseconds)

Properties

• connected - Check if connected
• session_id - Get session ID

Callbacks

• on_connect(callback) - Register connect callback
• on_disconnect(callback) - Register disconnect callback
• on_error(callback) - Register error callback

Address Patterns

CLASP supports wildcard patterns:

• * - Match single path segment
• ** - Match multiple path segments

Examples:

• /lumen/layer/*/opacity - All layer opacities
• /lumen/**/enabled - All enabled properties

Documentation

Visit clasp.to for full documentation.

License

MIT

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Maintained by LumenCanvas | 2026