Arontel Messaging Python SDK

Send SMS and MMS with synchronous or asynchronous Python clients. Requires Python 3.9 or newer.

Install

Once version 0.1.0 is published to PyPI:

pip install arontel-messaging

Send an SMS

from arontel_messaging import Client

with Client(api_key="api_key_your_key") as client:
    result = client.send_sms(
        from_="+19015551212",
        to="+19015551213",
        text="Hello from Arontel!",
    )
    print(result.message_id)

Use E.164 numbers with a leading +. from_ maps to the API's from field. API keys resolve in this order: request → client instance → global setting → ARONTEL_API_KEY environment variable.

HTTP backends

Select a backend with Client(backend="requests"), Client(backend="urllib3"), or AsyncClient(backend="aiohttp"). All backends reuse HTTP connections.

Async example

import asyncio
from arontel_messaging import AsyncClient

async def main():
    async with AsyncClient() as client:  # reads ARONTEL_API_KEY
        result = await client.send_sms(
            from_="+19015551212", to="+19015551213", text="Hello",
        )
        print(result.message_id)

asyncio.run(main())

Usage documentation

See the customer usage guide for MMS, API-key settings, backend configuration, timeouts, errors, and webhooks. Sends do not retry automatically; an accepted send is not proof of delivery.

License

MIT. Copyright (c) 2026 Arontel.