---
id: signalwire
version: "2.1.1"
license: MIT
license_treatment: permissive
maintenance: active
---

# signalwire — Client library for connecting to SignalWire.

License: permissive · Maintenance: active · Downloads: 109.4K/mo

## What it is and what it does

SignalWire is a Python SDK for accessing SignalWire's Relay APIs, a platform for building communication applications. It wraps SignalWire's backend services to let developers add voice, messaging, and other communication features to their Python applications without building the infrastructure from scratch.

The package depends on twilio and aiohttp, suggesting it may support both synchronous and asynchronous patterns for handling communication events. It is actively maintained, marked as production-stable, and has been in development since 2018. The library is intended for developers building communication-heavy applications or integrating communication capabilities into existing systems.

Use it for:

- Build a Python application that sends and receives SMS or voice calls via SignalWire's infrastructure
- Add real-time communication features (voice, messaging, video) to an existing web or backend application
- Create a call center or customer communication platform using SignalWire's Relay APIs
- Integrate SignalWire's communication services into an async Python application using aiohttp
- Prototype or deploy a communication service without managing telephony infrastructure directly

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

SignalWire is a Python client library for connecting to SignalWire's Relay APIs, enabling developers to build communication services like voice, messaging, and video into their applications.

Yes, if you need to integrate SignalWire's communication services into a Python application. The package is actively maintained, has low install friction, carries a permissive MIT license, and has no known vulnerabilities. Install only if you have a SignalWire account or plan to use their Relay APIs; it is not a general-purpose communication library.

## Install

pip install signalwire
uv add signalwire
poetry add signalwire

## Installing signalwire

Before you install: Low install friction with a pure-Python wheel distribution. Maintained actively as of 2026-08-13 with production-stable status. Depends on twilio and aiohttp, both widely-used libraries.

License in practice: MIT license (permissive) means you can use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.

Quickstart:

pip install signalwire

from signalwire.relay import Client

client = Client()

Requires Python 3.6 or later; likely requires SignalWire account credentials (not specified in fact sheet)

Verify before relying:

- Whether the package requires SignalWire account credentials or API keys to function beyond import
- Specific communication features supported (voice, SMS, video, etc.) beyond the general 'robust communication services' claim
- Whether aiohttp dependency implies async-only operation or if synchronous APIs are also available

## Package facts

- License: MIT (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 109.4K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

signalwire relay sdk python, voice messaging api python, communication services sdk, twilio alternative python, relay api client library, signalwire python client, build communication apps python, communications-api, relay-sdk, async-capable

[View on SkillFed](https://skillfed.io/packages/signalwire) · [View on PyPI](https://pypi.org/project/signalwire/)